CUSTOMeR
CONNeCTION
GUIDe
CONTeNTS
1.0 CHOOSE YOUR CONNECTION
1.1Power Connection Process and Time Frames
1.2Clearance to Overhead and Underground Power Lines
1.3
Project Overview 1.4Select the Service Type that Works for You
1.5TABLES
1.6DRAWINGS
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2.1
General Introduction
2.2 Standard Supply Voltages
2.3 Permits and Inspections
2.4 Service Connection Agreement
2.5 Drawing Requirements
2.6 Horizontal Clearance to Other Utilities 2.7
Service Entry Point
2.8 Electrical Room
2.9Main Switch or Breaker Minimum Interrupting Capacity 2.10 Maximum Horsepower of Motors 2.11 General Service Requirements
2.12 Trenching and Backhoe 2.13 Service Ducts
2.14 Duct Bends
2.15 Ground-Mounted Pull Boxes
2.16 Equipment Access 2.17 Site Housekeeping
2.18Padmount Transformers and Switching Cubicles 2.19Ground Grids and Guardrails for Padmounted Equipment
2.20 Blast Walls
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2.21 Conductors 2.22 Cable Installation
2.23Multi-Family Developments and Mobile Home Parks
2.24 Duplex, Triplex, and Fourplex Units
2.25 Service Interruption
2.26 Next Steps
2.27TABLES
2.28DRAWINGS
3.0 AERIAL SERVICE
3.1
General Introduction
3.2 Standard Supply Voltages
3.3 Permits and Inspections
3.4 Service Connection Agreement
3.5 Drawing Requirements
3.6 Horizontal Clearance to Other Utilities 3.7
Service Pole Location
3.8 Electrical Room
3.9Main Switch or Breaker Minimum Interrupting Capacity 3.10 Maximum Horsepower of Motors 3.11 General Service Requirements
3.12 Equipment Access 3.13 Site Housekeeping
3.14 Poles on Private Property 3.15 Attachment Methods
3.16 Wire Installation
3.17 Duplex, Triplex, and Fourplex Units
3.18 Service Interruption
3.19 Next Steps
3.20TABLES
3.21DRAWINGS
4.0 UNDERGROUND SECONDARY SERVICE
4.1
General Introduction
4.2 Standard Supply Voltages
4.3 Permits and Inspections
4.4 Service Connection Agreement
4.5 Drawing Requirements
4.6 Horizontal Clearance to Other Utilities 4.7
Service Entry Point
4.8 Electrical Room
4.9Main Switch or Breaker Minimum Interrupting Capacity 4.10 Maximum Horsepower of Motors 4.11 General Service Requirements
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4.12 Trenching and Backhoe
4.13Four Party Joint-Use Trench for Single-Family Residential Installations
4.14 Service Ducts
4.15 Duct Bends
4.16 Site Housekeeping
4.17 Conductors 4.18 Cable Installation
4.19Underground Residential Distribution Areas
4.20Underground Secondary Service in an Aerial Area (Secondary Lateral)
4.21 Increased Services
4.22Multi-Family Developments and Mobile Home Parks
4.23 Duplex, Triplex, and Fourplex Units
4.24 Service Interruption
4.25 Next Steps
4.26TABLES
4.27DRAWINGS
5.0 PRIMARY METERED SERVICE
5.1
General Introduction
5.2 Time Frames
5.3 Standard Supply Voltages
5.4 Permits and Inspections
5.5 Service Connection Agreement
5.6 Basic Drawing Requirements
5.7
Switchgear Submission Drawings
5.8 Horizontal Clearance to Other Utilities 5.9 Service Entry Point
5.10 Electrical Room
5.11Main Switch or Breaker Minimum Interrupting Capacity 5.12 Maximum Horsepower of Motors 5.13 General Service Requirements
5.14 Trenching and Backhoe
5.15 Service Ducts
5.16 Duct Bends
5.17 Ground-Mounted Pull Boxes
5.18 Pull Boxes in Buildings
5.19 Equipment Access 5.20 Site Housekeeping
5.21 Switching Cubicles 5.22Ground Grids and Guardrails for Padmounted Equipment
5.23 Conductors 5.24 Cable Installation
5.25 Coordination Study
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5.26Switchgear
5.27 Breaker Specifications (Main Service)
5.28Protection and Control Requirements (Overcurrent Protection)
5.29 Protection with Pilot Wire Relaying
5.30 Aerial Services
5.31Commissioning
5.32 Service Interruption
5.33 Next Steps
5.34TABLES
5.35DRAWINGS
6.0 NETWORK SERVICE
6.1
General Introduction
6.2 Standard Supply Voltages
6.3 Permits and Inspections
6.4 Service Connection Agreement
6.5 Basic Drawing Requirements
6.6Main Distribution Panel Cable Termination Detail Drawing
6.7 Horizontal Clearance to Other Utilities 6.8 Service Entry Point
6.9 Electrical Room
6.10Main Switch or Breaker Minimum Interrupting Capacity 6.11 Maximum Horsepower of Motors 6.12 General Service Requirements
6.13 Trenching and Backhoe 6.14 Service Ducts
6.15 Duct Bends
6.16 Ground-Mounted Pull Boxes
6.17 Pull Boxes in Buildings
6.18 Equipment Access 6.19 Site Housekeeping
6.20 Conductors 6.21 Cable Installation
6.22Termination
6.23 Duplex, Triplex, and Fourplex Units
6.24 Service Interruption
6.25 Next Steps
6.26TABLES
6.27DRAWINGS
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7.0 UNMETERED SERVICE
7.1
General Introduction
7.2Availability of Unmetered Service Connections
7.3
Standard Supply Voltages
7.4
Permits and Inspections
7.5
Service Connection Agreement
7.6
Basic Drawing Requirements
7.7
As-Built Drawing Requirements
7.8
Horizontal Clearance to Other Utilities 7.9
Servicing Location
7.10Main Switch or Breaker Minimum Interrupting Capacity 7.11 General Service Requirements
7.12 Trenching and Backhoe
7.13 Service Ducts
7.14 Duct Bends
7.15 Equipment Access 7.16 Site Housekeeping
7.17 Conductors for Underground Services
7.18Cable Installation for Underground Services 7.19 Wire Installation for Overhead Services
7.20Attachment Methods for Overhead Services
7.21 Street Lighting
7.22 Lane Lighting (Back Alley Lighting)
7.23Security Lighting (Lighting of Public Areas)
7.24 Conversion to a Metered Service 7.25 Service Interruption
7.26 Next Steps
7.27TABLES
7.28DRAWINGS
8.0METERING
8.1Commercial Metering – 200 Amps and Less (Socket Style)
8.2Commercial Metering – Greater Than 200 Amps
8.3 Residential Metering – 200 Amps and Less 8.4Residential Metering – Greater Than 200 Amps 8.5Network Area Metering – 200 Amps and Less (Socket Style)
8.6Network Area Metering – Greater Than 200 Amps 8.7 Primary Metering 8.8TABLES
8.9DRAWINGS
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9.0 ADDITIONAL INFORMATION
9.1
Cable Faults
9.2Checklists
9.3Co-generation
9.4Demolition
9.5 Easement Agreement
9.6 Hydro Excavating Procedure (Hydrovac) Over Primary or
Secondary Cables on Private Property
9.7
Operations 9.8 Privacy Policy
9.9 Relocation of EDTI equipment
9.10Splicing Primary and Secondary Cables on Private Property 9.11 Temporary Connections 9.12 Tree Trimming
9.13TABLES
9.14DRAWINGS
10.0DEFINITIONS
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1.0
1.0
CHOOSE
YOUR
CONNECTION
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Before you choose your connection, it’s important to understand the process that
needs to be followed. Here’s what you need to know:
1.1Power Connection Process and
Time Frames
EPCOR Distribution and Transmission Inc. (EDTI) has an easy-to-follow brochure called Knowledge
Is Power that describes the power connection process and the length of time it typically takes to get
connected. If you are looking for a Primary Metered Service, please see the Time Frames Section
(5.2) for more information on timing. Depending on the type of connection you need, the entire
process can take months to complete. It’s important to plan this time frame into your schedule.
1.2Clearance to Overhead and
Underground Power Lines
It’s also important to be aware of any power lines in the area when planning your construction.
The required clearance for overhead power lines may be as much as 7.0 metres. You must
consider the proximity of planned structures to power lines, or there may be serious safety
issues. All costs associated with meeting the required code clearances are the owner’s
responsibility. If the site is deemed unsafe, a stop-work order may be issued. You can get more
information on building near overhead lines and learn more at Where’s the Line.
1.3 Project Overview
Table 1 is a valuable guide to help you with your planning and construction. It provides a
summary of the types of service connections, and outlines the customer’s responsibilities as
well as EDTI’s responsibilities when getting a new connection completed. The table includes
the service connection point and point of service.
1.4Select the Service Type that
Works for You
We’ve noticed that most new customers need information about specific connections, so
we are providing information in that format. Take special note of the maximum service limits.
EDTI Customer Engineering Services must confirm all services prior to construction approval.
The maximum service limits specified below apply only to dedicated transformers. If multiple
customers share a transformer, limits may need to be reduced or alternate servicing arrangements
made. Contact us to discuss your particular servicing details.
Maximum service limits apply to services within our 15 KV and 25 KV service areas. For any new
or increased services in the 5 KV distribution area, contact us for limits. Refer to Drawing 23 for
the primary voltage in your area, and contact us for confirmation.
Mutual heating can affect the number of secondary conductors required which in turn may
limit your choice of service type. See rule 4.004 (d) of the Canadian Electrical Code Part 1
for more information on mutual heating and Section 2.22 of this guide for information on the
maximum number of conductors allowed.
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SeRVICe TYPe
COMMERCIAL SERVICE LIMITS
RESIDENTIAL SERVICE LIMITS
PADMOUNT TRANSFORMeR
A ground-mounted transformer
located on private property. Typical
installations include medium to
large commercial applications, large
houses, and multi-family sites.
120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 3,000 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 3,000 A
347/600 V, 3 Ph, 4 W – 2,400 A
120/240 V, 1 Ph, 3 W – 600 A
120/208 V, 2 Ph, 3 W – N/A
AeRIAL
An overhead service run from a
power pole. Typical installations
include homes and small
commercial applications.
120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – by special
permission only
120/208 V, 3 Ph, 4 W – 400 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 150 A
347/600 V, 3 Ph, 4 W – 150 A
120/240 V, 1 Ph, 3 W – 600 A
120/208 V, 2 Ph, 3 W – N/A
UNDeRGROUND SeCONDARY
A secondary underground service
fed from an existing transformer,
new transformer, or pedestal
installed on City of Edmonton
property. Typical installations
include homes and small to
medium commercial applications.
Ground-Mounted Transformer
120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 3,000 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 3,000 A
347/600 V, 3 Ph, 4 W – 2,400 A
120/240 V, 1 Ph, 3 W – 600 A
120/208 V, 2 Ph, 3 W – N/A
PRIMARY MeTeReD
A service above 750 volts phase to
phase. Typical installations include
very large commercial applications
where the demand load will exceed
2,500 KVA to one building, an
industrial lot with one customer, or a
commercial lot with one customer.
Services larger than 100 A by
special permission only.
Services larger than 100 A by
special permission only.
Services larger than 100 A by
special permission only.
Pole-Mounted Transformer
120/240 V, 1 Ph, 3 W – 600 A
240 V, 3 Ph, 3 W – by special
permission only
120/208 V, 3 Ph, 4 W – 400 A
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – 150 A
347/600 V, 3 Ph, 4 W – 150 A
The service size allowed is governed by many factors.
Please contact EDTI Customer Engineering Services.
NeTWORK
A 120/208 volt or 347/600 volt
service connected to EDTI’s
network system. The network
area extends from 97 to 110 Street
and from 97 to 104A Avenue in
downtown Edmonton. Typical
installations include medium to
large commercial applications.
120/240 V, 1 Ph, 3 W – N/A
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph 4 W – 3,000 A
120/208 V, 2 Ph, 3 W – 100 A
277/480 V, 3 Ph, 4 W – N/A
347/600 V, 3 Ph, 4 W – 1,600 A
UNMeTeReD
An unmetered service only available
to the City of Edmonton and
communication utility companies.
Typical installations include
streetlights, traffic signals, and
small utility service.
120/240 V, 1 Ph, 3 W – 100 A*
240 V, 3 Ph, 3 W – N/A
120/208 V, 3 Ph, 4 W – 100 A*
120/208 V, 2 Ph, 3 W – N/A
277/480 V, 3 Ph, 4 W – N/A
347/600 V, 3 Ph, 4 W – 100 A*
120/240 V, 1 Ph, 3 W – N/A
120/208 V, 2 Ph, 3 W – 100 A
Please contact EDTI for
confirmation of the network
voltage available in your area.
Please contact EDTI for
confirmation of the network
voltage available in your area.
Not available.
* The actual demand load must be less than 60 amps.
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1.5TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 1B:
CONNECTION
AeRIAL SeRVICe
This is an overhead
service run from
a power pole.
Typical installations
include homes and
small commercial
applications.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
SERVICE
CONNECTION
POINT
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Complete all work on
the building, including
installation of the
weatherhead and service
attachment.
Complete all work on
public property.
Weatherhead
on the building
Weatherhead on
the building
SERVICE
CONNECTION
POINT
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Install CTs and PTs.
Install and maintain all
intermediate poles and
associated hardware,
including racks, anchors,
and downhauls with only
secondary conductors
attached.
NOTE: The customer
owns and maintains
poles and anchors with
only secondary wires
attached.
Supply and install overhead
secondary conductors and
make the final connection
at the transformer and
weatherhead.
Supply, install, and
maintain all high-voltage
utility equipment, including
conductors, transformers,
and switches.
Install and maintain all
intermediate poles, anchors,
and downhauls with highvoltage (primary) conductors
attached on the line side of
the point of service.
Supply CTs and PTs.
Supply and install revenue
metering equipment.
Note: EDTI owns and
maintains all poles,
anchors, and downhauls
on the line side of the
point of service with
primary wire attached,
overhead secondary
conductors, and revenue
metering equipment.
TABLE 1C:
CONNECTION
UNDERGROUND
SECONDARY
SeRVICe
This is a secondary
underground service
fed from an existing
transformer, new
transformer, or
pedestal installed on
City of Edmonton
property. Typical
installations include
homes and small to
medium commercial
applications.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, and grounding.
Complete all work on
public property.
Supply and install
secondary cable.
Install CTs and PTs.
Note: The customer
owns and maintains all
secondary works on
private property.
Property line
Transformer or
pedestal
Terminate all secondary
conductors at the
transformer or pedestal.
Supply CTs and PTs.
Supply and install revenue
metering equipment.
Note: EDTI owns and
maintains all revenue
metering equipment.
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TABLE 1D:
CONNECTION
PRIMARY
MeTeReD SeRVICe
(UNDeRGROUND)
This is an
underground service
above 750 volts phase
to phase. Typical
installations include
very large commercial
applications
where the demand
load will exceed 2,500
KVA to one building,
an industrial lot with a
single customer, or a
commercial lot with a
single customer.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Install CTs and PTs.
NOTE: The customer
owns and maintains all
switching cubicle bases,
ground grids, and
primary ducts.
SERVICE
CONNECTION
POINT
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line
Switchgear
SERVICE
CONNECTION
POINT
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Supply and install primary
cable to the line side of the
main switchgear.
Terminate our primary
cable at the customer’s
switchgear.
Supply CTs and PTs.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all primary cable
on the line side of the point
of service and revenue
metering equipment.
TABLE 1E:
CONNECTION
PRIMARY MeTeReD
SeRVICe (AeRIAL)
This is an overhead
service above
750 volts phase
to phase. Typical
installations include
very large commercial
applications
where the demand
load will exceed 2,500
KVA to one building,
an industrial lot with a
single customer, or a
commercial lot with a
single customer.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Install all poles, anchors,
and wire on the load side
of the service connection
point.
Install poles, anchors, and
wire on the line side of the
service connection point.
NOTE: The customer
owns and maintains all
poles, anchors, and wire
on the load side of the
service connection point.
Supply and install CTs and
PTs.
Second pole
past the load
side of the
primary meter
structure
First pole past
the load side of
the primary meter
structure (GI pole)
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all poles,
anchors, CTs, and PTs
on the line side of the
point of service.
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TABLE 1F:
CONNECTION
NeTWORK SeRVICe
This is a 120/208
volt or 347/600 volt
service located in
the network area
with the transformer
connected to EDTI’s
network system.
The network area
extends from 97 to
110 Street and from
97 to 104A Avenue in
downtown Edmonton.
Typical installations
include medium to
large commercial
applications.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching and ducts.
Complete all work on
public property.
Install CTs and PTs.
NOTE: The customer
owns and maintains all
secondary ducts on
private property.
SERVICE
CONNECTION
POINT
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line
Switchgear
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Supply and install
secondary conductors and
make the final connection
at the transformer or ring
bus and the customer’s
switchgear.
Supply CTs and PTs.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains the secondary
cable to the line side of the
switchgear and revenue
metering equipment.
TABLE 1G:
CONNECTION
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
SERVICE
CONNECTION
POINT
UNMeTeReD
SeRVICe
Complete trenching,
ducting, and grounding.
This is an unmetered
service only available
to the City of
Edmonton and utility
companies. Typical
installations include
streetlights and traffic
signals.
Supply and install
secondary cable up to
the EDTI agreed-upon
demarcation point.
Supply and install required
transformers, poles, and
other equipment on public
property.
EDTI
agreed-upon
demarcation
point
For installations installed
by EPCOR or one of its
designated agents, please
reference the Transportation
Electrical Systems Asset
Definition Agreement.
EDTI agreed- upon
demarcation point
NOTE: EDTI owns and
maintains all facilities on
the line side of the agreedupon demarcation point.
NOTE: The customer
owns and maintains all
secondary cable and
duct on the load side of
the agreed-upon
demarcation point.
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1.6DRAWINGS
DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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2.0
2.0
PADMOUNT
TRANSFORMER
SERVICE
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2.1 General Introduction
•A padmount transformer service refers to a ground-mounted transformer located on
private property.
•Typical installations include medium to large commercial applications, large houses, and
multi-family sites.
•Please see Table 1 for a summary of your responsibilities as the customer and EDTI’s
responsibilities.
•If you decide that you require a padmount transformer service, please complete the
Commercial or Single Family Residential Application Form and email it to ces@epcor.com.
•See the Additional Information Section (9.0) to learn about such topics as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find what you need, but
we strongly suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
2.2 Standard Supply Voltages
•To see the standard voltages available from EDTI for this type of service, please see the
Select the Service Type That Works for You Section (1.4).
•Maximum service limits apply to services within our 15 KV and 25 KV service areas. For
any new or increased services in the 5 KV distribution area, contact us for service limits
and for confirmation of the primary voltage in your area. You can also refer to Drawing 23
for primary voltage information.
•240 volt, 3-phase, 3-wire services are not available from padmount transformers.
•1-phase equipment cannot be connected to 240 volt, 3-phase, 3-wire services.
•Two or more services of the same voltage will not be supplied to the same premises. An
example would be a 120/240 volt, 1-phase, 3-wire service and a 120/208 volt, 3-phase,
4-wire service.
2.3 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for the installation and operation of the service connection. We are not required
to start or continue operation of a service connection unless the customer has complied
with the licensing requirements of EDTI and all other authorities.
•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
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•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must also be inspected before the trench is backfilled. Please contact the City of
Edmonton to arrange for inspections. A service connection will not be energized unless
you have inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
2.4 Service Connection Agreement
•We require the customer to sign the Customer Acceptance portion of the estimate letter
as confirmation of intent to proceed with construction. This must be done before we
finalize the design and issue work orders.
•We may require the customer to sign a Construction Commitment Agreement, Electric
Service Agreement, and/or Interconnection Operating and Maintenance Agreement.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
2.5 Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting a padmount transformer service must submit a copy of the
following:
-Commercial or Single-Family Residential Application Form.
-Architectural site plan.
-Engineer approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines on private property.
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI Customer Engineering Services’ record system and
must be submitted in PDF and AutoCAD or MicroStation format.
•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Locations of planned and existing buildings.
-Size and location of primary and secondary conductors on the line (source) side
of the meter.
-Size and location of pull boxes and pedestals.
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-Direction of door openings for padmount transformers and cubicles.
-Location and size of the main distribution panel within the building, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-A detail of the electrical room layout.
-Easements and rights-of-way located on customer’s property.
-Location and description of all other utilities crossing or located within 3.0 metres of
proposed power facilities and conductors.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets if necessary to meet the readability criteria as long as
each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned
from the building and property lines and given real-world coordinates. Curb lines may also be
included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
2.6 Horizontal Clearance to Other Utilities
The following horizontal clearances to other utilities from underground service lines and
equipment, including padmount transformers, switching cubicles, guardrails, and ground grids,
must be maintained:
COMMeRCIAL INSTALLATIONS
•
Primary and Secondary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The primary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
ReSIDeNTIAL INSTALLATIONS
(SINGLe-FAMILY AND MULTI-FAMILY UNITS)
•
Primary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The primary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
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•
Secondary Conductors
-3.0 metres to hydrants, catch basins, manholes, septic tanks, fields, and Minnesota
Mounds. Secondary cables cannot cross through septic fields or Minnesota Mounds.
-2.0 metres to sanitary and storm sewer lines.
-1.0 metre to water lines and cc valves.
-1.0 metre to gas lines when in separate trenches. On residential properties where
a four-party joint-use trench is used, there must be a minimum of 0.3 metres of
separation, and a marker tape must be installed 0.5 metres above the service cable.
2.7 Service Entry Point
•It is critical that you contact EDTI Customer Engineering Services for your site-specific
service entry point (the point where EDTI’s infrastructure meets your property line) prior
to beginning construction. The service entry point can differ, due to a number of factors.
2.8 Electrical Room
•If service capacity exceeds 200 amps, service equipment must be located in a separate
electrical room of adequate size. The electrical room can only contain electrical and/or
communication equipment and must not contain mechanical devices, such as gas or water
equipment.
•A detail of the electrical room layout must be submitted for EDTI approval.
•See the Metering Section (8.0) for more detail.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, please contact us for these details.
2.9Main Switch or Breaker Minimum
Interrupting Capacity
•The interrupting capacity of main switches and breakers must be sized according to Table 3.
•The minimum interrupting capacity applies to all service entrance equipment.
•The interrupting capacities indicated are for one service from one matching transformer.
•When a larger transformer is installed to feed several services, the interrupting capacity
must match the total capacity of all services.
•For temporary services supplied from a permanent transformer, interrupting ratings must
match the available fault currents at the transformer.
•Due to higher fault levels, services supplied from the network system require larger
interrupting capacities. Please see the Network Service Section (6.0) for more information.
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2.10 Maximum Horsepower of Motors
•The maximum horsepower of motors permitted is identified in Table 2.
•Special permission is required prior to construction approval for motors larger than those
specified in Table 2. Please contact EDTI Customer Engineering Services for more
information.
2.11 General Service Requirements
•The customer is responsible for the installation and maintenance of all civil work on
private property, including maintaining the level of equipment. Civil work typically includes
trenching, ducting, transformer or cubicle pads, ground grids, guardrails, and pull boxes.
See Table 1.
•The customer is responsible for installing meter bases on private property.
•The location of the meter socket in relation to the main disconnect depends on the voltage.
See the Metering Section (8.0).
•EDTI owns and installs all equipment on public property.
•EDTI retains ownership of transformers, switching cubicles, and primary cables on the line
side of the point of service.
•Only EDTI employees or their authorized agents can operate or maintain electrical facilities
owned by EDTI.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•125 amp underground services for residential purposes are not available.
•In Alberta, residential services are not designed for electric heating as the primary heat
source. If it is to be used as the primary heat source, contact EDTI Customer Engineering
Services prior to construction. The customer may be assessed additional costs based on
the type of upgrades required.
•Typical residential underground services are available at 100 amps. To make arrangements
for service connections greater than 100 amps, contact us.
•Voltage drop calculations are the customer’s responsibility and must be submitted upon
request.
•The customer must ensure loading is balanced across all three phases of the service.
•We will not connect any permanent or temporary services to the City of Edmonton’s
streetlight system.
•The customer must provide space and easements for utility equipment to maintain the
flexibility of the power system, if required by EDTI Customer Engineering Services. See
the Easement Agreement Section (9.5) for more information.
•Connections and disconnections must be done by EDTI or its authorized agents.
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•EDTI Customer Engineering Services will not permit the installation of service lines
crossing public property between private properties.
•EDTI must be notified prior to construction approval when neutral grounding devices are
incorporated into service equipment.
2.12 Trenching and Backhoe
•
All proposed cable routing and duct work is subject to written approval by EDTI
Customer Engineering Services prior to construction approval.
•As a customer, you cannot do any excavation work on City of Edmonton property, but must
complete all trenching on your property.
•Underground service lines must be kept a minimum of 1.0 metre from the edge of the
property line.
•The customer’s contractor must not trench within 1.0 metre of any EDTI wood pole,
anchor, transformer, switching cubicle ground grid (2.0 metres from the edge of the
concrete base), power pedestal, or energized cable. The facilities must be located
first using hydro excavating or hand digging before determining where the mechanical
excavation limits end.
•Ensure that the trench is a minimum of 1,000 millimetres to a maximum of 1,200
millimetres below finished grade and that the service cable is set on undisturbed soil that
is free from rocks, debris, and sudden grade changes. If large lumps of clay and soil have
hardened due to drying or freezing, and when a backhoe has been used for electrical
service installation, a 150 millimetre layer of sand must be placed below the cable. For all
service installations, a 300 millimetre layer of sand must be placed above the cable.
•A marker tape must be installed 0.5 metres above all underground electrical conductors.
•The customer must backfill all trenches with material that is free of stones and items with
sharp edges.
•Backfill must be placed in uniform lifts not exceeding 300 millimetres and compacted to
the City of Edmonton Design and Construction Standards, Volume 2 – Roadways.
•Backfill material over cable can be the material trenched with a mechanical trencher, if the
inspector deems it suitable. Soil with high thermal resistivity that contains large amounts of
organics, peat, black loam, sod, hardened clay, stones, straw, snow, or frozen material will
not be acceptable. All backfill material is subject to the inspector’s approval. Sand or clean
backfill material must be substituted for unsuitable backfill.
•The trench must take the most direct route to the meter base location.
•Some work may be required over energized primary or secondary cables. This may involve
crossing or over trenching the cables. Mechanical excavation is allowed up to 1.0 metre
from the energized facilities. The facilities must first be located using hydro excavation or
hand digging before determining where the mechanical excavation limits end.
•EDTI Customer Engineering Services will allow a contractor to over trench up to 5.0 metres
of energized facilities by hand or hydro excavation. Follow Alberta One-Call procedures and
contact us before starting work.
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•Exposed energized cables cannot be left unattended. If the excavation is narrow or small,
the primary cable must be covered with soil bags or some other suitable temporary
method. Contact us for more details.
•Under no circumstances can energized primary cables be moved or handled in any way.
•When a trench has been backhoed, cables must be shaded with 300 millimetres of sand.
Backhoed material cannot be placed over cable.
2.13 Service Ducts
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•
All permanent commercial services must be in duct.
•For residential installations, we highly recommend installing any cable that will ultimately
end up under driveways, decks, etc. in duct. See Drawing 2 for a typical underground
service installation.
•Duct must be installed where primary cable is deemed inaccessible by EDTI.
•Underground primary service cables must not be installed under buildings, unless they’re
in a conduit, with an additional spare conduit capped at both ends and placed next to the
cable at the 1,000 millimetre depth. On the building, mark where the cable and conduit
ends enter and exit under the building. Although this is a potential solution for work
under buildings, we highly recommend taking all necessary steps to avoid this form of
construction.
•The customer will provide all conduits (rigid PVC, DB2, Carlon Borguard, Terracon, or other
EDTI-approved ducts only), pull boxes, and manholes required for installing the electrical
services on the customer’s property.
•Conduit size requirements for primary (high-voltage) cables depend on cable size and
voltage. See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull
box standards.
•Contact EDTI Customer Engineering Services to confirm the primary voltage in your area.
•Service conduits installed by contractors working on behalf of other utilities or the City
of Edmonton must follow EDTI Customer Engineering Services’ construction standards.
Contractors must not work within 1.0 metre of any electrical equipment.
•When EDTI conduits have been stubbed to the property line, customers must first confirm
that the conduit exposed is the correct one, and then connect their supply conduit to
EDTI’s conduit. Contact us to arrange for conduit verification.
•If the pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed. See Section 2.15 for more information.
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2.14 Duct Bends
•All bends exiting transformers and cubicles must be made of rigid, thick-walled PVC
(schedule 40) with minimum wall thickness of 6.0 millimetres for 4 inch, 6.6 millimetres for
5 inch, and 7.1 millimetres for 6 inch. DB2 bends are not acceptable.
•An additional 10 foot horizontal section of rigid, thick-walled PVC must be attached to the
bend.
•The primary duct must be aligned directly underneath the primary transformer bushings
and centered within the base opening, as per Drawings 6 and 7. The conduit bends must
exit the earth at 90 degrees.
•The customer must ensure all secondary ducts are aligned directly under the secondary
bushings of the transformer and centered within the base opening.
•All bends that EDTI will supply conductors for must be equipped with bell collars to avoid
damaging the cable.
•All spare bends are to be covered (taped or covered by some other suitable method) to
prevent material falling into them.
•Primary ducts exiting switching cubicles must be identified (i.e. identify the piece of
equipment the pipe services).
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
2.15 Ground-Mounted Pull Boxes
•EDTI Customer Engineering Services reserves the right of final approval of the pull box size
and location prior to construction.
•If the pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed. See Drawing 1.
•The accumulative total of all bends between pulling points cannot exceed four 90 degree
bends, as per Canadian Electrical Code Rule 12-940.
•Contact us to perform a cable pulling calculation for your specific site.
•The size of the ground-mounted pull box required depends on the type of cable being
installed.
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
•Conduits must enter and leave the pull box at the same level.
•Communication cables cannot share the same pull box with primary cables.
•Customer-owned facilities cannot share the same pull box with EDTI facilities.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will own the cable. See the Equipment Access Section (2.16) for more
information.
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•Rigid, thick-walled PVC (schedule 40) with minimum wall thickness of 6.0 millimetres for 4
inch, 6.6 millimetres for 5 inch, and 7.1 millimetres for 6 inch must be installed for the first 10ft
when entering/ exiting any pull boxes, manholes, or vaults. DB2 bends are not acceptable.
2.16 Equipment Access
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will be installing the cable.
•Access to equipment must be provided on private property. Without special permission
from EDTI Customer Engineering Services, public roadways or laneways are not
acceptable for access to equipment on private property.
•Equipment must be placed beside a 4.6 metre wide access roadway, centred in an
unimpeded 6.5 metre area. The area must be capable of supporting an 18,000 kilogram
truck, plus a transformer weighing up to 6,900 kilograms (transformers must be unloaded
from the side of the vehicle). Outriggers on the truck must extend to a width of 6.07
metres.
•Any overhang or other obstruction over the access roadway, such as a sign, must have a
minimum of 5.0 metres of vertical clearance.
•If access is through a locked enclosure, the customer shall provide double lock capability
on the gate to accommodate an EDTI lock.
•Padmounted equipment must be placed in a location not to exceed maximum setbacks
from driving surfaces as outlined in Table 5.
•Equipment must be placed in a location where it will not create a line-of-sight concern for
traffic or pedestrians.
•Where the transformer is to be installed in an alcove, the size of the alcove required
depends on the size of the transformer and the setback distance of the transformer. Please
talk to EDTI Customer Engineering Services for exact requirements and refer to Drawing 3.
2.17 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI personnel, our
personnel will leave the site until the issues are rectified.
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2.18Padmount Transformers
and Switching Cubicles
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will be installing the cable. See the Equipment Access Section (2.16) for
more information.
•Padmounted equipment must be placed in a location that does not exceed maximum
setbacks from driving surfaces, as outlined in Table 5.
•Switching cubicles must be connected to EDTI’s main line in such a manner as to provide a
loop feed. No radial-fed cubicle installations will be allowed on private property.
•We will supply, install, and maintain required transformers and switching cubicles, and
perform all required primary and secondary conductor terminations at the transformer and
switching cubicle.
•Required clearances between transformers and buildings can be as high as 6.0 metres,
depending on the type of transformer used. This is especially true in our 5 KV service
area, where 347/600 volt or 277/480 volt transformers are required. See Drawing 23 for
the primary voltage in your area, and contact us to confirm the required clearance for your
specific installation.
•When a transformer or switching cubicle is required on the customer’s property, the
customer must provide the precast concrete bases with an appropriate ground grid and
guardrails. Please see the Ground Grids and Guardrails for Padmounted Equipment
Section (2.19).
•When the customer is required to install a cubicle base, we will provide a detailed drawing
showing how the base must be constructed. We will also confirm the type of cubicle base
to be installed. As an example, for a 200 amp cubicle with three-fused compartments, a
600 amp cubicle base is required. Please see Drawings 4 and 5.
•The fault indicator lights adjacent to the “B” compartment of switching cubicles must face
the main road. Exceptions to this rule must be approved by EDTI Customer Engineering
Services prior to construction approval.
•Excavation for bases should be stepped so that the native backfill is not disturbed under
the ground grid area. This will help prevent rods bending and deformation of the ground
grid during backfilling and compaction. The area where the ground grid and rods are
installed should not be dug as deep as the base excavation.
•The bottom of the excavation where the base will be installed requires 300 millimetres of
compacted three-quarter-inch road crush (20 millimetre crushed gravel).
•Proper tamping is crucial to ensure transformer and cubicle bases are installed correctly.
Ensure that three-quarter-inch road crush is tamped in one-foot lifts. See Drawings 4 and 7.
•EDTI reserves the right to request compaction tests from the customer.
•2 × 10-inch pressure-treated lumber is required under all switching cubicle bases and
1-phase transformer bases. See Drawings 4, 5 and 6.
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•If conditions do not support a precast base, piles must be poured. Engineered drawings
stamped by a civil engineer must be supplied to EDTI Customer Engineering Services prior
to approval.
•Within 3.0 metres of padmounted equipment, landscaping must slope away from the base
at a 2 percent grade (no more or less) to allow for proper drainage and safe operational
switching.
•3.0 metres of working space without obstructions that would interfere with high-voltage
switching—such as rocks, decorative boulders, trees, and fences—must be allowed
for on the door sides of transformers and switching cubicles. Examples of appropriate
landscaping are sod, asphalt, wood chips, and concrete. Please note that switching
cubicles have two sets of doors.
•Curbs within 3.0 metres of the door sides of transformers and switching cubicles require
approval from EDTI Customer Engineering Services prior to construction.
•Equipment must not be subject to flooding under runoff conditions.
•The height of the top of the concrete base must be between 250 millimetres and 300
millimetres above finished grade.
•When a switching cubicle base is installed, the customer must install a pull string between
the cubicle and transformer.
•Customers are responsible for maintaining (including levelling) all transformer and switching
cubicle bases installed on their property.
•When padmounted equipment is to be located on top of a parkade, detailed drawings
under the seal of a registered professional engineer practising structural engineering must
be submitted for EDTI approval. We highly recommended taking all necessary steps to
avoid this form of construction.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, please contact us for these details.
2.19Ground Grids and Guardrails for
Padmounted Equipment
•Transformers and switching cubicles must be protected from mechanical damage in
accordance with the Canadian Electrical Code, Part I, Rule 26-240(4). Customers are
required to provide guardrails for all installations of transformers and switching cubicles on
private property.
•Guardrails must have removable sections in front of the doors of equipment, as per
Drawing 9. Please note that switching cubicles have two sets of doors.
•Customers are also responsible for installing ground grids around all padmounted
equipment. They must consist of four copper-clad ground rods interconnected by #4/0 bare
copper grounding conductor and an additional two #4/0 bare copper grounding conductor
tails, connected to the ground bus of the equipment.
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•A sufficient length of #4/0 bare copper grounding conductor must be installed to allow
3.0 metres (no more or less) to be left above the top of the precast transformer base. The
conductor must be left in an organized manner to allow for easy removal and shaping.
•Ground rod resistance must measure 6 ohms or less.
•The minimum distance to the property line for the ground grids of padmount transformers
and switching cubicles is 1.0 metre.
•When non-EDTI equipment is placed within 3.0 metres of the edge of EDTI equipment,
the ground grid of the EDTI equipment must be bonded using two tails to the ground of
the non-EDTI equipment. The customer must show details on the power plan of how
the bonding is to be achieved. The detail must also show the clearance between the
edge of the EDTI equipment and non-EDTI equipment. The non-EDTI equipment cannot
be installed within 1.0 metre of the EDTI ground grid. It also can’t be located within the
guardrails.
•Ground grids for padmount equipment located on the top of a parkade must be bonded
to the rebar of the building with two 4/0 conductors terminating to a remote ground grid.
These conductors must be physically separated. The equipment base must be encircled
by a #4/0 bare copper conductor embedded in the concrete 900 millimetres outside of the
base. The gradient control conductor must be bonded to the rebar in the four corners, with
two tails from alternate corners entering the base and a length of 3.0 metres extending
above the top of the base. Detailed drawings under the seal of a registered professional
engineer practising electrical engineering need to be submitted to EDTI Customer
Engineering Services for approval.
•See Drawing 8 for ground grid requirements when cubicles and transformers are next to
each other.
•Fine fill clay backfill is required around the ground grid.
2.20 Blast Walls
•Blast walls are only required in rare circumstances. We will inform you if they are required.
The blast walls must consist of one of the following:
-
150 millimetre thick reinforced concrete
-
200 millimetre solid concrete blocks
-An alternate equivalent non-combustible rated design (including a possible roof),
submitted to EDTI Customer Engineering Services under the seal of a registered
professional engineer practising structural engineering
2.21Conductors
•
Armoured or metal-sheathed (TECK) cable cannot be used for permanent services.
•With our permission, TECK cable can be used for temporary installations. The customer
must supply all associated fittings, including connectors, grounding bushings, and
weatherheads. See the Temporary Connections Section (9.11) for more details.
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•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
•Secondary cables on all residential and multi-family developments must be concentricneutral direct-buried type (USEB). See Table 6 for details.
•For residential installations, ensure the conductor used on private property is compatible
with EDTI conductors on City of Edmonton property. Table 6 shows standard cable sizes
and types allowed.
•For commercial installations, secondary cable must be individual RW90 conductors in duct.
•For commercial services connected to a 3-phase padmount transformer, the maximum
size of conductor allowed is 500 MCM copper or 750 MCM aluminum.
•For all residential and multi-family 1-phase services, the maximum conductor size allowed
is 4/0 AL XLPE CN.
2.22Cable Installation
•If primary cable pulling lengths exceed the maximum pulling tension of the cable, a pull
box must be installed. See Table 4 and the Ground-Mounted Pull Boxes Section (2.15) for
further information.
•Telephone and television cables can be installed in the same trench as power conductors.
Design drawings must be forwarded to the appropriate organizations for their approval.
•Cable cannot be installed on building footings or weeping tile.
•Secondary cable ends must have heat shrink caps.
•Primary cable ends must be wrapped with elastomeric tape (e.g. Greenline) to prevent
the migration of moisture in the cable before testing. Elastomeric tape must be wrapped
in a spiral shape overlapping half of each previous wrap at a time and then covered with
black low-voltage vinyl tape. A minimum of two layers of half-lapped tape is to be applied.
Immediately after testing, heat shrink caps must be installed on primary cable ends.
•When a switching cubicle base is installed, the customer must install a pull string between
the cubicle and transformer.
•EDTI will make the final connection in the cubicle, transformer, or pedestal.
•EDTI will supply and install all primary conductors in the customer-prepared conduit, but
only after the primary ductwork has passed an electrical inspection. Multi-family sites
are an exception to this rule.
•The customer will supply and install secondary conductors from the customer’s switchgear
to the transformer location, leaving 3.0 metres (no more or less) of conductors above the
top of the precast transformer base. Then the conductors must be coiled in a clockwise
direction and left in an organized manner around the inside perimeter of the base to allow
for easy removal and shaping.
•The phasing of secondary conductors coiled in a transformer must be identified with
marking tape at intervals not exceeding 1.0 metre.
•The maximum length of service conductors permitted in a building is 3.0 metres, unless they
are mechanically protected in rigid metal conduit, in which case the maximum is 7.5 metres.
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•In general, a maximum of six runs of secondary conductors are permitted for all 1-phase
padmount transformers. In some circumstances, additional runs may be permitted.
Contact us to discuss your specific installation.
•In general, a maximum of six runs of secondary conductors are permitted for 3-phase
padmount transformers up to 1,000 KVA. In some circumstances, additional runs may be
permitted. Contact us to discuss your specific installation.
•In general, a maximum of eight runs of secondary conductors are permitted for 1,500 KVA
and 2,500 KVA 3-phase padmount transformers. In some circumstances, additional runs
may be permitted. Contact us to discuss your specific installation.
•The customer will identify service conductors by the meter address by using long-life ink
on a tie-wrap attached to the conductors. This identification is mandatory when there are
multiple service connections or when a customer-owned distribution facility, such as a
pedestal, is used.
2.23Multi-Family Developments and Mobile
Home Parks
This section applies to multiple-metered residential service connections where 1-phase
padmount transformers and service pedestals are required on the customer’s property. While
other information on padmount transformer installations found elsewhere in this guide also
applies, the following information is specific to multi-family developments and mobile home parks.
•
The customer in multi-family developments must supply the primary cable.
•Cable requirement depends on the primary voltage in your area. See Drawing 23 for
primary voltage and Table 4 for primary cable, duct, and pull box standards.
•Contact EDTI Customer Engineering Services to confirm the primary voltage in your area.
•All cables used must strictly conform to our specifications.
•We recommend that all primary cables be installed in duct on private property.
•If the primary cable is deemed inaccessible by EDTI, primary cables must be installed in
duct.
•For multi-family sites where the primary duct is proposed between the last transformer
and the cubicle, a coil of primary cable should be direct-buried at the service entry point for
EDTI to extend into the switching cubicle. Once we extend the cable into the cubicle, the
contractor must install split pipe for conduit coupling.
•For sites with more than two transformers, a primary loop feed is required. Please contact
us to confirm loop feed requirements.
•The customer must supply the manufacturer’s cable production test results, as per our
specifications for primary cables, prior to cable installation. The test results must be sent to
EDTI Customer Engineering Services.
•The customer must provide concrete bases for 1-phase transformers, as per Drawing 6.
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•The customer must install a distribution facility such as a service pedestal. Pedestals must
meet Canadian standards and also Canadian Electrical Code requirements for bending
radius and space to ensure proper termination. The maximum pedestal rating is 400 amps
based on the allowable secondary conductors of parallel 4/0 Al from Table 6. Service to an
individual dwelling unit cannot be directly connected to the transformer.
•The customer must identify service conductors at the padmount transformer by pedestal
number, and at the pedestal by meter address, which is the address of the building the
meter serves. Meter sockets must be identified by service address and pedestal number.
Use a long-life ink on a tie-wrap attached to the conductors for this identification. This is
mandatory when a customer-owned distribution facility, such as a pedestal, is used.
•For emergency purposes, each pedestal must be identified with the name and phone
number of an on-site representative who is available 24 hours a day.
•Before energization, the customer must make all terminations on all incoming feeds from
the transformer at the service pedestals, and at the neutrals in the pedestals, for the
individual services to the units. Customers must not terminate the hot conductors of the
service wire in the pedestal. EDTI Customer Engineering Services will extend a customersupplied conductor to the switching cubicle or pole on City of Edmonton property.
•
Drawing 10 provides information on submission requirements for multi-family developments.
•EDTI will require a blanket easement be registered on title for most multi-family
installations. A blanket easement covers the entire parcel of land.
2.24 Duplex, Triplex, and Fourplex Units
ALL UNITS ON ONe LOT
•Each individual unit in a new multiple dwelling will be served as a separate service, unless
EDTI Customer Engineering Services agrees otherwise.
•If a homeowner’s agreement is in place, one service may be installed to a common
location on the building to service all the units.
•Please contact us to talk about your specific situation.
eACH UNIT ON AN INDIVIDUAL LOT
•Each individual unit in a new multiple dwelling must be served as a separate service,
unless EDTI Customer Engineering Services agrees otherwise.
•We may require additional work at the customer’s expense to ensure no trespass is created.
•Please contact us to talk about your specific situation.
BARe-LAND DeVeLOPMeNT
•We require a blanket easement to be registered on the owner’s title in EDTI’s name. See
the Additional Information Section (9.5) for more information on easements.
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2.25 Service Interruption
•While we make all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI, EDTI Customer Engineering Services has the right to
disconnect or otherwise curtail, interrupt, or reduce Distribution Tariff Service to customers
whenever EDTI reasonably determines, or is told by the Alberta Electric System Operator,
that such a disconnection, curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
2.26 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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2.27TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 2:
Maximum Horsepower of Motors Permitted
RATING OF
MAIN SERVICE
CONDUCTORS
(AMPS)
208Y
VOLTS
240 VOLTS
3-PHASE
480Y
VOLTS
600Y
VOLTS
100 A
10
10
25
30
200 A
20
20
50
50
300 A
30
30
75
100
400 A
40
40
100
125
600 A
60
*
150
200
800 A
75
*
200
200
1,200 A
100
*
200
200
1,600 A
125
*
200
200
2,000 A
150
*
200
200
* Special permission is required prior to construction approval for
motors larger than those indicated in the table. Please contact
EDTI Customer Engineering Services for more information.
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TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 4 - PART 1:
Primary Cable, Duct, and Pull Box Standards
MINIMUM BENDING
RADIUS FOR CABLE
(MILLIMETRES)
IN-GROUND
PULL BOX
DETAILED
DRAWING
NUMBER
VOLTAGE
(KILOVOLTS)
DRESSING
PULLING
CONDUIT SIZE
(MILLIMETRES)
MINIMUM
RADIUS OF
DUCT BENDS
(MILLIMETRES)
1-1/C 1/0 AL XLPE
CN-J
15 kV
329 mm
493 mm
100 mm (4”)
610 mm (24”)
Drawing #1
– Page 1
3-1/C 1/0 AL XLPE
CN-J
15 kV
329 mm
493 mm
100 mm (4”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C 500 MCM Cu
XLPE CN-J Triplexed
15 kV
578 mm
823 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3-1/C 750 MCM Cu
XLPE CN-J Triplexed
15 kV
684 mm
908 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3-1/C 750 MCM Cu EPR
LC Shield – J Triplexed
15 kV
631 mm
899 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
1-1/C #1/0 XLPE AL
25 kV
380 mm
571 mm
125 mm (5”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C #1/0 XLPE AL
25 kV
380 mm
571 mm
125 mm (5”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C 500 MCM Al
XLPE CN-J
25 kV
523 mm
785 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3 -1/C 750 MCM Cu
XLPE CN-J Triplexed
28 kV
762 mm
1087 mm 150 mm (6”)
1,219 mm (48”)
Drawing #1
– Page 2
CABLE TYPE
•EDTI reserves the right of final approval of the pull box size and locations prior to construction.
•Contact EDTI Customer Engineering Services for confirmation of the cable type being installed
for your specific site and to perform a pulling calculation for you.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be installed.
•See Drawing 23 for the primary voltage rating in your area.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree bends,
as per the Canadian Electrical Code Rule 12-940.
•Conduits must enter and exit the pull box at the same level.
•Communication cables cannot share the same pull box with primary cables.
•Please see examples A and B below, showing maximum pulling distances for two standard
installations.
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TABLE 4 - PART 2:
Primary Cable, Duct, and Pull Box Standards
Examples
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TABLE 5:
Padmount Equipment – Maximum Setback Distances
5A - TRANSFORMERS
MAXIMUM DISTANCE
BETWEEN THE DRIVING
SURFACE AND THE
NEAREST EDGE OF THE
TRANSFORMER BASE
SERVICE SIZE (AMPS)
1-PHASE
3-WIRE
120/240 VOLT
3-PHASE
4-WIRE
208Y/120 VOLT
3-PHASE
4-WIRE
480Y/277 VOLT
THREE-PHASE
4-WIRE
600Y/347 VOLT
9.0 m
All
Up to 400 A
Up to 200 A
Up to 100 A
7.0 m
Up to 1,000 A
Up to 400 A
Up to 200 A
5.0 m
Up to 1,600 A
Up to 600 A
Up to 600 A
3.0 m
Up to 2,000 A
Up to 1,000 A
Up to 1,200 A
2.0 m
Up to 3,000 A
Up to 3,000 A
Up to 3,000 A
•Multiple services – Contact EDTI Customer Engineering Services for applicable setback
distances.
•Distances specified are applicable to roadway / parking lot installations only.
•For alcove installations, reference Drawing 3 and contact EDTI Customer Engineering
Services for applicable setback / vehicle clearance distances.
5B - SWITCHING CUBICLES
MAXIMUM DISTANCE
BETWEEN THE DRIVING
SURFACE AND THE NEAREST
EDGE OF THE SWITCHING
CUBICLE BASE
9.0 m
SWITCHING
CUBICLE
All except
automated cubicles
•Distances specified are applicable to roadway / parking lot installations only.
•Contact EDTI Customer Engineering Services for setback distances for automated cubicles.
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TABLE 6:
Residential and Multi-Family Underground
Services – Acceptable Conductors
UNDERGROUND 1 PHASE SECONDARY (TYPE USEB CABLE)
SERVICE SIZE
(AMPS)
NUMBER/TYPE OF CABLES
100 A
1 – 1/C #1/0 AL XLPE 600 V (typical 100 A residential service cable since 2011)
150 A
1 – 2/C #2/0 AL XLPE 600 V
200 A
1 – 2/C #4/0 AL XLPE 600 V
300 A
2 – 2/C #2/0 AL XLPE 600 V (parallel)
400 A
2 – 2/C #4/0 AL XLPE 600 V (parallel)
Maximum 6 cables per phase
Cables on all residential and multi-family developments must be concentric-neutral
direct-buried type (USEB). The most recent specifications for secondary cables
are available on request. Check with EDTI Customer Engineering Services for the
cable that must be installed for each site.
In underground residential distribution areas, the standard service size is 100 amps.
The area developer may have installed larger cable (i.e. 2/C #2/0 or 2/C #4/0 XLPE
AL 600 V) to compensate for voltage drop. Cable size does not necessarily indicate
the size of service that is available. Contact EDTI’s Customer Engineering Services
for confirmation on all services larger than 100 amps.
•2/C # 2 XLPE USEB 600-volt cable was the standard 100 amp service cable in EDTI’s
system until 2011. This cable is only allowed for use in those locations where it was
installed at the time of area development.
•For services in which more than 30 metres of cable is required on private property (from
property line to the meter socket), contact EDTI’s Customer Engineering Services to
confirm voltage drop requirements.
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DRAWING 1 - PART 1:
Cable Pull Box Dimension
for 1/0 Primary Cables (1.2 X 1.2 X 1.2M)
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2.28DRAWINGS
DRAWING 1 - PART 2:
Cable Pull Box Dimension
for 500MCM & Larger Primary Cables
(1.4 X 2.9 X 2.0M)
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DRAWING 2:
Typical Underground Residential Service
Installation on Property
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DRAWING 3:
Typical Transformer Alcove Layout
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DRAWING 4 - PART 1:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 2:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 3:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 4:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
TABLE - SWITCHING CUBICLE PRECAST BASE DIMENSIONS AND PRESSURE
TREATED LUMBER DIMENSIONS
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DRAWING 4 - PART 5:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 6:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 5 - PART 1:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 2:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 3:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 4:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 5:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 6 - PART 1:
Concrete Base for Single Phase
15kV & 25kV Padmounted Transformer
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DRAWING 6 - PART 2:
Concrete Base for Single Phase
15kV & 25kV Padmounted Transformer
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DRAWING 6 - PART 3:
Installation of Precast Concrete Base and Ducting
Details for 15kV & 25kV Single Phase Transformer
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DRAWING 7 - PART 1:
Installation of Precast Concrete Base and
Ducting Details for 3 Phase Transformer
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DRAWING 7 - PART 2:
Installation of Precast Concrete Base and
Ducting Details for 3 Phase Transformer
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DRAWING 7 - PART 3:
Installation of Precast Concrete Base and
Ducting Details for 3 Phase Transformer
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DRAWING 7 - PART 4:
Installation of Precast Concrete Base and
Ducting Details for 3 Phase Transformer
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DRAWING 7 - PART 5:
Installation of Precast Concrete Base and
Ducting Details for 3 Phase Transformer
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DRAWING 8 - PART 1:
Ground Grid Requirements for 15kV & 25kV
Switching Cubicle and 3 Phase Transformers Next
to Each Other
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DRAWING 8 - PART 2:
Ground Grid Requirements for 15kV & 25kV
Switching Cubicle and 3 Phase Transformers Next
to Each Other
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DRAWING 9:
Guardrail Construction Details
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DRAWING 10:
Sample of Submission for Multi-Family Developments
(FOR EXAMPLE PURPOSES ONLY)
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DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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3.0
3.0
AERIAL
SERVICE
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3.1
General Introduction
•An aerial service is an overhead service run from a power pole.
•Typical installations include homes and small commercial applications.
•Please see Table 1 for a summary of your responsibilities as the customer and the
responsibilities of EPCOR Distribution and Transmission Inc. (EDTI).
•If you decide that you require an aerial service, please complete the Commercial or Single
Family Residential Application Form and email it to ces@epcor.com.
•See the Additional Information Section (9.0) to learn about such topics as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find what you need, but
we strongly suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
3.2 Standard Supply Voltages
•To see the standard voltages available from EDTI for this type of service, please see the
Select the Service Type That Works for You Section (1.4).
•Maximum service limits apply to services within our 15 KV and 25 KV service areas. For
any new or increased services in the 5 KV distribution area, contact us for limits. Refer to
Drawing 23 for the primary voltage in your area, and contact us for confirmation.
•New or increased 240 volt, 3-phase, 3-wire services will only be supplied if approved by
EDTI Customer Engineering Services.
•Existing 240 volt, 3-phase, 3-wire services will continue to be maintained.
•1-phase equipment cannot be connected to 240 volt, 3-phase, 3-wire services.
•Two or more services of the same voltage will not be supplied to the same premises. An
example would be a 120/240 volt, 1-phase, 3-wire service and a 120/208 volt, 3-phase,
4-wire service.
3.3 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for installing and operating the service connection. We are not required to start
or continue operation of a service connection unless the customer has complied with the
licensing requirements of EDTI and all other authorities.
•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
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•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must be inspected before the trench is backfilled. Contact the City of Edmonton
to arrange for inspections. A service connection will not be energized unless you have
inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
3.4 Service Connection Agreement
•We require the customer to sign the Customer Acceptance portion of the estimate letter
as confirmation of intent to proceed with construction. This is required before we finalize
the design and issue work orders.
•We may require the customer to sign a Construction Commitment Agreement, Electric
Service Agreement, and/or Interconnection Operating and Maintenance Agreement.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
3.5 Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting an aerial electrical service must submit a copy of the following:
-Commercial or Single-Family Residential Application Form.
-Architectural site plan (when clearance issues are a concern).
-Engineer approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines on private property (when poles
or anchors are set on private property).
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI’s record system and must be submitted in PDF and
AutoCAD or MicroStation format.
•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Location of intermediate poles and anchors on the line (source) side of the service
connection point.
-Locations of planned and existing buildings.
-The direction of door openings for padmount transformers and cubicles.
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-The location and size of the main distribution panel within the building, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-A detail of the electrical room layout.
-Easements and rights-of-way on the customer’s property.
-Location and description of all other utilities located within 3.0 metres of proposed
poles and anchors on property.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets, if necessary to meet the readability criteria, as long
as each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned from
the building and property lines and given real-world coordinates. Curb lines may also be included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
3.6 Horizontal Clearance to Other Utilities
•
Poles and anchors on private property require the following clearances:
•3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. Poles and anchors must not be
set in septic fields and Minnesota Mounds.
•1.8 metres to all water lines and cc valves.
•1.0 metre to all gas lines.
3.7 Service Pole Location
•It is critical that you contact EDTI Customer Engineering Services for your site-specific
service pole location before beginning construction. The site-specific point can differ, due
to a number of circumstances.
3.8 Electrical Room
•If service capacity exceeds 200 amps, service equipment must be located in a separate
electrical room of adequate size. The electrical room can only contain electrical and/or
communication equipment. It must not contain mechanical devices, such as gas or water
equipment.
•A detail of the electrical room layout must be submitted for EDTI approval.
•See the Metering Section (8.0) for more detail.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, please contact us for these details.
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3.9Main Switch or Breaker Minimum
Interrupting Capacity
•The interrupting capacity of main switches and breakers must be sized according to Table 3.
•The minimum interrupting capacity applies to all service entrance equipment.
•The interrupting capacities indicated are for one service from one matching transformer.
•When a larger transformer is installed to feed several services, the interrupting capacity
must match the total capacity of all services.
•For temporary services supplied from a permanent transformer, interrupting ratings must
match the available fault currents at the transformer.
•Due to higher fault levels, services supplied from the network system require larger
interrupting capacities. Please see the Network Service Section (6.0) for more information.
3.10 Maximum Horsepower of Motors
•The maximum horsepower of motors permitted is identified in Table 2.
•Special permission is required prior to construction approval for motors larger than those
indicated in Table 2. Please contact EDTI Customer Engineering Services for more
information.
3.11 General Service Requirements
•Aerial (overhead) services will not be provided in areas served by underground electrical
facilities.
•Special permission is required from EDTI prior to construction approval when installing
primary (high-voltage) overhead wires on private property.
•Aerial (overhead) services are not permitted on lots adjacent to “Major Commercial
Corridors” as outlined in the City of Edmonton bylaw # 12800-12. Streets such as
St. Albert Tr., Mark Messier Tr., Fort Rd., Calgary Tr., Gatway BLVD, and Stony Plain Rd.
are affected. Please see Appendix 1 – Major Commercial Corridors Overlay for specific
details on areas included in this bylaw.
•The customer is responsible for the installation and maintenance of all civil work on
private property, including maintaining the level of equipment. Civil work typically includes
trenching, ducting, transformer or cubicle pads, ground grids, guardrails, pull boxes, and
intermediate service poles. Please see Table 1.
•The customer is responsible for installing meter bases on private property.
•The location of the meter socket in relation to the main disconnect depends on the voltage.
See the Metering Section (8.0).
•EDTI owns and installs all equipment on public property.
•EDTI retains ownership of transformers, switching cubicles, and wire on the line side of the
service connection point.
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•Only EDTI’s employees or their authorized agents can operate or maintain any electrical
facilities owned by EDTI.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•125 amp overhead services for residential purposes are not available.
•In Alberta, residential services are not designed for electric heating as the primary heat
source. If it is to be used as the primary heat source, contact EDTI Customer Engineering
Services prior to construction. The customer may be assessed additional costs based on
the type of upgrades required.
•Typical residential overhead services are available at 100 amps. To arrange for service
connections greater than 100 amps, contact us.
•Voltage drop calculations are the customer’s responsibility and must be submitted upon
request.
•The customer must ensure loading is balanced across all three phases of the service.
•We will not connect any permanent or temporary service to the City of Edmonton’s
streetlight system.
•The customer must provide space and easements for utility equipment to maintain the
flexibility of the power system, if required by EDTI Customer Engineering Services. See
the Easement Agreement Section (9.5) for more information.
•Connections and disconnections must be done by EDTI or its authorized agents.
•EDTI Customer Engineering Services will not permit the installation of service lines
crossing public property between private properties.
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•The required clearance to overhead power lines may be as much as 7.0 metres. Failing to
consider the proximity of planned structures to power lines poses serious safety issues. All
costs associated with meeting the required code clearances are the owner’s responsibility.
If the site is deemed unsafe, a stop-work order may be issued. You can get more
information on building near overhead lines and learn more at Where’s the Line.
3.12 Equipment Access
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes if we will be installing the cable.
•Access to equipment must be provided from private property. Without special permission
from EDTI Customer Engineering Services, public roadways or laneways are not acceptable
for access to equipment on private property.
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•Equipment must be placed beside a 4.6 metre wide access roadway, centred in an unimpeded
6.5 metre area. The area must be capable of supporting an 18,000 kilogram truck, plus a
transformer weighing up to 6,900 kilograms (transformers must be unloaded from the side
of the vehicle). Outriggers on the truck also must extend to a width of 6.07 metres.
•Any overhang or other obstruction over the access roadway, such as a sign, must have a
minimum of 5.0 metres of vertical clearance.
•If access is through a locked enclosure, the customer shall provide double lock capability
on the gate to accommodate an EDTI lock.
•Poles need to be placed to allow unimpeded access by our vehicles. Contact EDTI
Customer Engineering Services for site-specific information.
•Equipment must be placed in a location where it will not create a line-of-sight concern for
traffic or pedestrians.
3.13 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI personnel, our
personnel will leave the site until the issues are rectified.
3.14 Poles on Private Property
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•Special permission is required for installing primary (high-voltage) overhead wires on
private property. Customers need to get this permission from EDTI prior to construction
approval.
•We require truck access to poles where we will be installing the wire. See the Equipment
Access Section (3.12) for more information.
•EDTI owns, installs, and maintains all poles and anchors on the line side of the service
connection point with primary (high-voltage) conductors attached.
•The customer owns, installs, and maintains all poles and anchors on private property with
only secondary conductors attached.
•It’s important to be aware of any power lines in the area when planning construction.
The required clearance to overhead power lines may be as much as 7.0 metres. Failing to
consider the proximity of planned structures to power lines poses serious safety issues
and potential additional costs to relocate the lines. You can get more information on
building near overhead lines and learn more at Where’s the Line.
•Poles on private property must meet EDTI construction standards. For example, they must
be a minimum of Class 3 and butt treated.
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•Poles that only have secondary conductors attached must be a minimum of 40 feet long
and set at a depth of 6 feet.
•Poles with primary conductors attached must be a minimum of 45 feet long and set at a
depth of 6.5 feet.
•Full-length treated (green) poles are not acceptable.
•Pole lines on private property must be constructed with required clearances from the
property line to avoid interference with development on adjacent property. The property
line will be considered a structure. See Table 7 of the Alberta Electrical Utility Code for
required clearances.
•The customer must ensure an intermediate pole is in place if the span from the attachment
device to the service pole is greater than the maximum span length noted in Table 7.
•The pole must be set as per Drawing 11 and placed in a straight line between the service
pole and the building attachment; otherwise, anchors may be required.
•We will not connect the customer’s service if the intermediate pole appears unsatisfactory.
•At our request, the customer will be required to have the intermediate pole tested to
ensure suitability.
3.15 Attachment Methods
•The attachment point and weatherhead on the building must be on the side facing the pole
line and as close as is practical to the service pole.
•EDTI Customer Engineering Services reserves the right to request that the attachment
point be adjusted to minimize or eliminate service trespass to neighbouring properties.
•The attachment point is to be a maximum of 6.0 metres from final grade and must be
accessible by a ladder.
•The customer is required to install the appropriate attachment device to the building. See
Drawings 12, 13, and 14, and Table 8.
•See Table 8 for acceptable intermediate pole attachment devices.
•In general, the attachment must be vertical.
•Horizontal attachments may be used to increase clearances, depending on the angle of pull
from the pole to the building. If you’re not sure if you can use a horizontal attachment, ask
the inspection authority.
•A minimum vertical clearance of 0.6 metres and a minimum horizontal clearance of 1.0
metre must be maintained between attachment devices at the building.
•The attachment point for the electrical service must be above any communication services.
•Attachment devices must be secured to the building to withstand the service wire pulling
tension requirements.
•Ensure the horizontal distance between the attachment point and the weatherhead is a
minimum of 300 millimetres and a maximum of 1,000 millimetres. The weatherhead must
be above the attachment point.
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•Ensure the vertical distance between the attachment point and the weatherhead is a
minimum of 150 millimetres and a maximum of 300 millimetres. The weatherhead must be
above the attachment point.
3.16 Wire Installation
•EDTI will make the final connection at the transformer.
•Services exceeding the maximum spans noted in Table 7 may require an intermediate pole,
or the customer will have to redesign the service with an underground system.
•We will supply and install up to 30 metres of service wire, according to spans noted in
Table 7, and make all terminations at the weatherhead, once inspection approval is received.
•The maximum length of service conductors permitted in a building is 3.0 metres,
unless they are mechanically protected in rigid metal conduit, in which case the maximum
is 7.5 metres.
3.17 Duplex, Triplex, and Fourplex Units
ALL UNITS ON ONe LOT
•Each individual unit in a new multiple dwelling will be served as a separate service, unless
EDTI Customer Engineering Services agrees otherwise.
•If a homeowner’s agreement is in place, one service may be installed to a common
location on the building to service all the units.
•Please contact us to discuss your specific situation.
eACH UNIT ON AN INDIVIDUAL LOT
•Each individual unit in a new multiple dwelling must be served as a separate service,
unless EDTI Customer Engineering Services agrees otherwise.
•We may require additional work at the customer’s expense to ensure no trespass is created.
•Please contact us to discuss your specific situation.
BARe-LAND DeVeLOPMeNT
•We require that a blanket easement be registered on the owner’s title in EDTI’s name. See
the Easement Agreement Section (9.5) for more information.
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3.18 Service Interruption
•While we take all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI, EDTI Customer Engineering Services has the right to
disconnect or otherwise curtail, interrupt, or reduce Distribution Tariff Service to customers
whenever EDTI reasonably determines, or is told by the Alberta Electric System Operator,
that such a disconnection, curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
3.19 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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3.20TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 2:
Maximum Horsepower of Motors Permitted
RATING OF
MAIN SERVICE
CONDUCTORS
(AMPS)
208Y
VOLTS
240 VOLTS
3-PHASE
480Y
VOLTS
600Y
VOLTS
100 A
10
10
25
30
200 A
20
20
50
50
300 A
30
30
75
100
400 A
40
40
100
125
600 A
60
*
150
200
800 A
75
*
200
200
1,200 A
100
*
200
200
1,600 A
125
*
200
200
2,000 A
150
*
200
200
* Special permission is required prior to construction approval for
motors larger than those indicated in the table. Please contact
EDTI Customer Engineering Services for more information.
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TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 7:
Aerial Services – Acceptable Wire and Spans
CUSTOMER’S SERVICE
CONDUCTOR AMPS
WEATHER PROTECTED (WP)
SERVICE WIRE
MAXIMUM ALLOWABLE
SPAN (METRES)
600
# 556.5 MCM
10 m
400
# 336.4 MCM
15 m
300
# 4/0 AWG
15 m
200 (Commercial)
#1/0 AWG Open
30 m
200 (Residential)
# 1/0 AWG Multiplex
30 m
150
# 1/0 AWG Multiplex
30 m
100
# 4 AWG Multiplex
30 m
AWG = American Wire Gauge
MCM = Thousand Circular Mils
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TABLE 8:
Aerial Service Attachment Methods
CUSTOMER AMPERAGE (AMPS)
ATTACHMENT METHOD
1-phase less than or equal to 150 A
Clevis (residential or commercial)
1-phase 200 A – residential
Heavy-duty clevis
1-phase 151-600 A – commercial
Three-spool heavy-duty rack (all)
3-phase less than or equal to 150 A
Heavy-duty clevis
3-phase 151-400 A
Four-spool heavy-duty rack
•Refer to Drawing 12 for examples of allowable installations.
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3.21DRAWINGS
DRAWING 11 - PART 1:
Customer Owned Pole Installation on Private
Property - Deadend Pole
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DRAWING 11 - PART 2:
Customer Owned Pole Installation on Private
Property - Straight Line
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DRAWING 12:
Heavy Duty Attachment Devices
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DRAWING 13:
Typical Residential Aerial Service Installation
(Maximum Service Span Distance 30 Meters)
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DRAWING 14:
Typical Residential Aerial Service Attachment
Details (Maximum Distance 30 Meters) Service
Attachment to be on the Pole Line Side of the
Building
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DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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4.0
4.0
UNDERGROUND
SECONDARY
SERVICE
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4.1
General Introduction
•An underground secondary service is a service that’s fed from an existing transformer,
new transformer, or pedestal installed on City of Edmonton property.
•Typical installations include homes and small to medium commercial applications.
•Please see Table 1 for a summary of your responsibilities as the customer and the
responsibilities of EPCOR Distribution and Transmission Inc. (EDTI).
•If you decide that you require an underground secondary service, please complete the
Commercial or Single Family Residential Application Form and email it to ces@epcor.com.
•See the Additional Information Section (9.0) to learn about such topics as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find, but we strongly
suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
4.2 Standard Supply Voltages
•To see the standard voltages available from EDTI for this type of service, please see the
Select the Service Type That Works for You Section (1.4).
•Maximum service limits apply to services within our 15 KV and 25 KV service areas. For
any new or increased services in the 5 KV distribution area, contact us for limits. Refer to
Drawing 23 for the primary voltage in your area, and contact us for confirmation.
•New or increased 240 volt, 3-phase, 3-wire services will only be supplied if approved by
EDTI Customer Engineering Services.
•Existing 240 volt, 3-phase, 3-wire services will continue to be maintained.
•240 volt, 3-phase, 3-wire services are not available from padmounted transformers.
•1-phase equipment cannot be connected to 240 volt, 3-phase, 3-wire services.
•Two or more services of the same voltage will not be supplied to the same premises. An
example would be a 120/240 volt, 1-phase, 3-wire service and a 120/208 volt, 3-phase,
4-wire service.
4.3 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for installing and operating the service connection. We are not required to start
or continue operation of a service connection unless the customer has complied with the
licensing requirements of EDTI and all other authorities.
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•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must also be inspected before the trench is backfilled. Please contact the City of
Edmonton to arrange for inspections. A service connection will not be energized unless
you have inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
4.4 Service Connection Agreement
•We require the customer to sign the Customer Acceptance portion of the estimate letter to
confirm intent to proceed with construction. This is required before we finalize the design
and issue work orders.
•We may require the customer to sign a Construction Commitment Agreement, Electric
Service Agreement, and/or Interconnection Operating and Maintenance Agreement.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
4.5 Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting an underground secondary service must submit a copy of the following:
-Commercial or Single Family Residential Application Form.
-Architectural site plan.
-Engineer approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines on private property.
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI’s record system and must be submitted in PDF and
AutoCAD or MicroStation format.
•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Locations of planned and existing buildings.
-Size and location of secondary conductors on the line (source) side of the meter.
-Size and location of pedestals.
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-Direction of door openings for padmount transformers and cubicles.
-Location and size of the main distribution panel within the building, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-A detail of the electrical room layout.
-Easements and rights-of-way located on the customer’s property.
-Location and description of all other utilities crossing or located within 3.0 metres of
proposed power facilities and conductors.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets, if necessary to meet the readability criteria, as long
as each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned from
the building and property lines, and given real-world coordinates. Curb lines may also be included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
4.6 Horizontal Clearance to Other Utilities
The following horizontal clearances to other utilities from underground service lines and
equipment, including padmount transformers, switching cubicles, guardrails, and ground grids,
must be maintained:
COMMeRCIAL INSTALLATIONS
•
Secondary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The secondary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
RESIDENTIAL INSTALLATIONS
(SINGLE-FAMILY AND MULTI-FAMILY UNITS)
•
Secondary Conductors
-3.0 metres to hydrants, catch basins, manholes, septic tanks, fields, and Minnesota
Mounds. Secondary cables cannot cross through septic fields or Minnesota Mounds.
-2.0 metres to sanitary and storm sewer lines.
-1.0 metre to water lines and cc valves.
-1.0 metre to gas lines when in separate trenches. On residential properties where a
four-party joint-use trench is used, there must be a minimum 0.3 metre separation, and
a marker tape must be installed 0.5 metres above the service cable.
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4.7 Service Entry Point
•It is critical that you contact EDTI Customer Engineering Services for your site-specific
service entry point (the point where EDTI’s infrastructure meets your property line)
before beginning construction. The service entry point can differ, due to a number of
circumstances.
4.8 Electrical Room
•If service capacity exceeds 200 amps, service equipment must be located in a separate
electrical room of adequate size. The electrical room can only contain electrical and/or
communication equipment. It cannot contain mechanical devices, such as gas or water
equipment.
•A detail of the electrical room layout must be submitted for EDTI approval.
•See the Metering Section (8.0) for more detail.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, contact us for these details.
4.9Main Switch or Breaker Minimum
Interrupting Capacity
•The interrupting capacity of main switches and breakers must be sized according to Table 3.
•The minimum interrupting capacity applies to all service entrance equipment.
•The interrupting capacities indicated are for one service from one matching transformer.
•Where a larger transformer is installed to feed several services, the interrupting capacity
must match the total capacity of all the services.
•For temporary services supplied from a permanent transformer, interrupting ratings must
match the available fault currents at the transformer.
•Due to higher fault levels, services supplied from the network system require larger
interrupting capacities. Please see the 3 for more information.
4.10 Maximum Horsepower of Motors
•The maximum horsepower of motors permitted is identified in Table 2.
•Special permission is required prior to construction approval for motors larger than those
indicated in Table 2. Please contact EDTI Customer Engineering Services for more
information.
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4.11 General Service Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•The customer is responsible for the installation and maintenance of all civil work on
private property, including maintaining the level of equipment. Civil work typically includes
trenching, ducting, transformer or cubicle pads, ground grids, guardrails, and pull boxes.
Please see Table 1.
•The customer is responsible for installing meter bases on private property.
•The location of the meter socket in relation to the main disconnect depends on the voltage.
See the Metering Section (8.0).
•EDTI owns and installs all equipment on public property.
•EDTI retains ownership of transformers, switching cubicles, and primary cables on the line
side of the point of service.
•Only EDTI employees or their authorized agents can operate or maintain any electrical
facilities owned by EDTI.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•125 amp underground services for residential purposes are not available.
•In Alberta, residential services are not designed for electric heating as the primary heat
source. If it is to be used as the primary heat source, contact EDTI Customer Engineering
Services prior to construction. The customer may be assessed additional costs based on
the type of upgrades required.
•Typical residential underground services are available at 100 amps. To make arrangements
for service connections greater than 100 amps, contact us.
•Voltage drop calculations are the customer’s responsibility and must be submitted upon
request.
•The customer must ensure loading is balanced across all three phases of the service.
•We will not connect any permanent or temporary service to the City of Edmonton’s
streetlight system.
•The customer must provide space and easements for utility equipment to maintain flexibility
of the power system, if required by EDTI. See the Easement Agreement Section (9.5) for
more information.
•Connections and disconnections must be done by EDTI or its authorized agents.
•EDTI will not permit the installation of service lines crossing public property between
private properties.
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4.12 Trenching and Backhoe
•
All proposed cable routing and duct work is subject to our written approval prior
to construction.
•As a customer, you cannot do any excavation work on City of Edmonton property, but you
must provide all trenching on your property.
•Underground service lines must be kept a minimum of 1.0 metre from the edge of the
property line.
•The customer’s contractor must not trench within 1.0 metre of any EDTI wood pole, anchor,
transformer, or switching cubicle ground grid (2.0 metres from the edge of the concrete
base), power pedestal, or energized cable. The facilities must be located first using hydro
excavating or hand digging before determining where the mechanical excavation limits end.
•Ensure that the trench is a minimum of 1,000 millimetres to a maximum of 1,200
millimetres below finished grade and that the service cable is set on undisturbed soil that
is free from rocks, debris, and sudden grade changes. If large lumps of clay and soil have
hardened due to drying or freezing, and when a backhoe has been used for electrical
service installation, a 150 millimetre layer of sand must be placed below the cable. For all
service installations, a 300 millimetre layer of sand must be placed above the cable.
•The customer must backfill all trenches with material that is free of stones and items with
sharp edges.
•Backfill must be placed in uniform lifts not exceeding 300 millimetres and compacted to
the City of Edmonton Design and Construction Standards Volume 2 – Roadways.
•If a trench has been backhoed, cables must be shaded with 300 millimetres of sand.
Backhoed material cannot be placed over cable.
•Backfill material over cable can be the material trenched using a mechanical trencher, if the
inspector deems it suitable. Soil with high thermal resistivity containing large amounts of
organics, peat, black loam, sod, hardened clay, stones, straw, snow, or frozen material will
not be acceptable. All backfill material is subject to the inspector’s approval. Sand or clean
backfill material must be substituted for unsuitable backfill.
•A marker tape must be installed 0.5 metres above all underground electrical conductors.
•The trench must take the most direct route to the meter base location.
•Some work may be required over energized primary or secondary cables. This may involve
crossing or over trenching the cables. Mechanical excavation is allowed up to 1.0 metre
from the energized facilities. The facilities must first be located using hydro excavating or
hand digging before determining where the mechanical excavation limits end.
•EDTI Customer Engineering Services will allow a contractor to over trench up to 5.0 metres
of energized facilities by hand or hydro excavating. Follow Alberta One-Call procedures and
call us before starting work.
•Exposed energized cables cannot be left unattended. If the excavation is narrow or small,
the primary cable must be covered with soil bags or secured with some other suitable
temporary method. Contact us for more details.
Under no circumstances can energized primary cables be moved or handled in any way.
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4.13Four Party Joint-Use Trench for
Single-Family Residential Installations
•
With prior approval from EDTI Customer Engineering Services, a 4 party joint-use
trench may be used for residential installations only.
•Telephone and television cables as well as gas service lines can be placed in a 4 party jointuse trench with the power cable. When gas service lines are installed along with power
cables, the 4 party trench installation method must be followed:
-A minimum of 0.3 metres must separate the gas and power lines and a marker tape
must be installed 0.5 metres above the service cable. Please see Drawing 15.
4.14 Service Ducts
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•
All permanent commercial services must be in duct.
•For residential installations, we highly recommend that any cable that will ultimately end up
under driveways, decks, etc. be installed in duct. See Drawing 2 for a typical underground
service installation.
•The customer will provide all conduits (rigid PVC, DB2, Carlon Borguard, Terracon, or other
EDTI-approved ducts only), pull boxes, and manholes required on the customer’s property
for installing the electrical services.
•Service conduits installed by contractors working on behalf of other utilities or the City of
Edmonton must follow the construction standards of EDTI Customer Engineering Services.
Contractors must not work within 1.0 metre of any electrical equipment.
•If EDTI conduits have been stubbed to the property line, customers must first confirm that
the conduit exposed is the correct one, and then connect their supply conduit to EDTI’s
conduit. Contact us to arrange for conduit verification.
4.15 Duct Bends
•All bends exiting transformers and cubicles must be made of rigid, thick-walled PVC
(schedule 40) with a minimum wall thickness of 6.0 millimetres for 4 inch, 6.6 millimetres
for 5 inch, and 7.1 millimetres for 6 inch. DB2 bends are not acceptable.
•An additional 10 foot horizontal section of rigid, thick-walled PVC must be attached to the bend.
•Ensure all secondary ducts are aligned directly under the secondary bushings of the
transformer and centred within the base opening.
•All bends that EDTI will supply conductors for must be equipped with bell collars to avoid
damaging cable.
•All spare bends are to be covered (taped or covered by some other suitable method) to
prevent material falling into them.
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4.16 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI personnel, our
personnel will leave the site until the issues are rectified.
4.17Conductors
•
Armoured or metal-sheathed (TECK) cable cannot be used for permanent services.
•With our permission, TECK cable can be used for temporary installations. The customer
must supply all associated fittings, including connectors, grounding bushings, and
weatherheads. See the Temporary Connections Section (9.11) for more details.
•Secondary cables on all residential and multi-family developments must be concentricneutral direct-buried type (USEB). See Table 6 for details.
•For residential installations, ensure the conductor used on private property is compatible
with EDTI conductors on City of Edmonton property. Table 6 shows standard cable sizes
and types allowed.
•For commercial installations, secondary cable must be individual RW90 conductors in duct.
•For commercial services connected to a 3-phase padmount transformer, the maximum
size of conductor allowed is 500 MCM copper or 750 MCM aluminum.
•For all residential and multi-family 1-phase services, the maximum conductor size allowed
is 4/0 AL XLPE CN.
•The maximum size of secondary conductor allowed for commercial underground
secondary services in an aerial area (secondary lateral) is 500 MCM copper. 750 MCM
aluminum is not an acceptable conductor.
4.18 Cable Installation
•Telephone and television cables can be installed in the same trench as power conductors.
When this is considered, design drawings must be forwarded to the appropriate
organizations for their approval.
•Cable cannot be installed on building footings or weeping tile.
•Secondary cable ends must have heat shrink caps installed.
•EDTI will make the final connection in the cubicle, transformer, or pedestal.
•The customer will supply and install secondary conductors from the customer’s switchgear
to the transformer location, leaving 3.0 metres (no more or less) of conductors above the
top of the precast transformer base. Then the conductors must be coiled in a clockwise
direction and left in an organized manner around the inside perimeter of the base to allow
for easy removal and shaping.
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•The phasing of secondary conductors coiled in a transformer must be identified with
marking tape at intervals no longer than 1.0 metre.
•The maximum length of service conductors permitted in a building is 3.0 metres, unless
they are mechanically protected in rigid metal conduit, in which case the maximum is
7.5 metres.
•In general, a maximum of six runs of secondary conductors are permitted for all 1-phase
padmount transformers. In some circumstances, additional runs may be permitted.
Contact us to discuss your specific installation.
•In general, a maximum of six runs of secondary conductors are permitted for 3-phase
padmount transformers up to 1,000 KVA. In some circumstances, additional runs may be
permitted. Contact us to discuss your specific installation.
•In general, a maximum of eight runs of secondary conductors are permitted for 1,500 KVA
and 2,500 KVA 3-phase padmount transformers. In some circumstances, additional runs
may be permitted. Contact us to discuss your specific installation.
•The customer must identify service conductors by the meter address, by using long-life
ink on a tie-wrap attached to the conductors. This identification is mandatory when there
are multiple service connections or when a customer-owned distribution facility, such as a
pedestal, is used.
4.19Underground Residential
Distribution Areas
This section applies to areas with a mix of residential and commercial lots that will contain
underground power facilities and are designed and built by a developer. While other information
on underground secondary services found elsewhere in this guide also applies, the following
information is specific to underground residential distribution areas.
•In underground residential distribution areas, the standard service size is 100 amps. The
area’s developer may have installed a larger cable to compensate for voltage drop. The
cable size installed does not necessarily indicate the size of service that is available.
Contact EDTI Customer Engineering Services for more information.
•If power coils are left at the property line but are too short to reach the meter base, the
customer or the customer’s contractor must call EDTI Meter Services to complete the
splice. If the contractor has taken the most direct route but the cable is short, we will
complete the splice at no charge. In all other circumstances, there will be a charge for the
splice. Contact EDTI Meter Services for splicing costs and payment details.
•As the customer, you or your contractor must ensure a splice pit is dug at the service entry
location. See the Additional Information Section (9.10) for more information.
•If there is no service conductor coiled at the property line, the customer or the customer’s
contractor must trench and supply and install conductors from the meter base to the
property line, with enough conductors at the property line to allow for termination. Contact
EDTI Customer Engineering Services for length.
•See Drawing 2 for a typical underground service installation.
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•For the customer’s standard service conductors, please see Table 6. Due to voltage drop
concerns, cable sizes installed in residential subdivisions may not match the service sizes
indicated in the table. The customer’s cable must match the cable stubbed at the service
entry point.
•Due to the possibility of voltage drop, please contact us to confirm cable requirements for
service lengths exceeding 30 metres on private property.
•In newer subdivisions, 30 metres of service cable is coiled on the property side of the gas
easement.
4.20Underground Secondary Service in an
Aerial Area (Secondary Lateral)
•There will be additional costs associated with this type of service. Please contact us for
specific information.
•If you’re looking for an underground secondary cable to be installed to the building from a
transformer mounted on a pole, the following procedure needs to be completed:
-Follow the steps in our Knowledge Is Power brochure.
-Complete all civil work on private property. See the Trenching and Backhoe Section
(4.12) for more details.
FOR COMMeRCIAL INSTALLATIONS:
•The customer must supply and install the service conduit from the customer’s panel to the
property line.
•The maximum size of service conduit is 100 millimetres (4 inches) in diameter. See the
Service Ducts Section (4.14) and Cable Installation Section (4.18) for more details.
•The customer must connect the conduit to EDTI’s conduit (if existing) at the property line.
•The customer must supply and install sufficient length of conductor to terminate at the
pole-mounted transformer. EDTI Customer Engineering Services will determine the length
of conductor.
•The maximum size of secondary conductor allowed for commercial underground secondary
services in an aerial area (secondary lateral) is 500 MCM copper. 750 MCM aluminum is
NOT an acceptable conductor. See the Conductors Section (4.17) for more details.
•We will complete all work on City property, including:
-Supplying and installing conduit from the property line up the pole.
-Coordinating with the electrical contractor to ensure the customer-supplied conductors
are pulled from the property line up the pole.
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FOR ReSIDeNTIAL INSTALLATIONS:
•Duct is not required for residential installations, but we strongly suggest it under pavement,
decks, etc.
•The customer must leave a coil of cable (of a length determined by EDTI) at the property
line, buried in sand at the designated service entry point. See Table 6 for acceptable
secondary cables.
•We will complete all work on City property, including:
-Supplying and installing conduit from the property line up the pole
-Pulling customer-supplied conductors (including telephone and television cable) from
the property line up the pole
•A possible alternative to taking an underground service from an EDTI pole is to take an
overhead service to the garage and sub-feed the house with an underground service.
Please contact EDTI Customer Engineering Services for more details.
4.21 Increased Services
If you’re looking to increase the size of your electrical service, complete the following procedure:
•Follow the steps in our Knowledge Is Power brochure.
•Complete all civil work on private property. See the Trenching and Backhoe Section (4.12)
for more details.
•Supply and install the secondary cable. See the Service Ducts Section (4.14) and the Cable
Installation Section (4.18) for more details.
•Leave a coil of cable (of a length determined by EDTI Customer Engineering Services) at
the property line, buried in sand at the designated service entry point.
•We will complete all work on City of Edmonton property.
4.22Multi-Family Developments and Mobile
Home Parks
This section applies to multiple-metered residential service connections where 1-phase
padmount transformers and service pedestals are required on the customer’s property. While
information on secondary services found elsewhere in this guide also applies, the following
information is specific to multi-family developments and mobile home parks.
•All cables used must strictly conform to the specifications of EDTI Customer Engineering
Services.
•The customer must install a distribution facility such as a service pedestal. Pedestals
must meet Canadian standards and Canadian Electrical Code requirements for bending
radius and space to ensure proper termination. The maximum pedestal rating is 400 amps
based on the allowable secondary conductors of parallel 4/0 Al from Table 6. Service to an
individual dwelling unit cannot be directly connected to the transformer.
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•The customer must identify service conductors at the padmount transformer by pedestal
number, and at the pedestal by meter address, which is the address of the building the
meter serves. Meter sockets must be identified by service address and pedestal number.
Use a long-life ink on a tie-wrap attached to the conductors for this identification. This is
mandatory if a customer-owned distribution facility, such as a pedestal, is used.
•For emergency purposes, each pedestal must be identified with the name and phone
number of an on-site representative who is available 24 hours a day.
•Before energization, the customer must make all terminations on all incoming feeds
from the transformer at the service pedestals, and at the neutrals in the pedestals, for
the individual services to the units. Customers must not terminate the hot conductors of
the service wire in the pedestal. EDTI will extend a customer-supplied conductor to the
switching cubicle or pole on City of Edmonton property.
•
Drawing 10 provides information on submission requirements for multi-family
developments.
•EDTI will require a blanket easement be registered on title for most multi-family
installations. A blanket easement covers the entire parcel of land.
4.23 Duplex, Triplex, and Fourplex Units
ALL UNITS ON ONe LOT
•Each individual unit in a new multiple dwelling will be served as a separate service, unless
EDTI Customer Engineering Services agrees otherwise.
•If a homeowner’s agreement is in place, one service may be installed to a common
location on the building to service all the units.
•Please contact us to talk about your specific situation.
eACH UNIT ON AN INDIVIDUAL LOT
•Each individual unit in a new multiple dwelling must be served as a separate service,
unless EDTI Customer Engineering Services agrees otherwise.
•We may require additional work at the customer’s expense to ensure no trespass is created.
•Please contact us to talk about your specific situation.
BARe-LAND DeVeLOPMeNT
•We require a blanket easement to be registered on the owner’s title in EDTI’s name. See
the Easement Agreement Section (9.5) for more information.
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4.24 Service Interruption
•While we take all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI, EDTI has the right to disconnect or otherwise curtail,
interrupt, or reduce Distribution Tariff Service to customers whenever EDTI reasonably
determines, or is told by the Alberta Electric System Operator, that such a disconnection,
curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
4.25 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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4.26TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 2:
Maximum Horsepower of Motors Permitted
RATING OF
MAIN SERVICE
CONDUCTORS
(AMPS)
208Y
VOLTS
240 VOLTS
3-PHASE
480Y
VOLTS
600Y
VOLTS
100 A
10
10
25
30
200 A
20
20
50
50
300 A
30
30
75
100
400 A
40
40
100
125
600 A
60
*
150
200
800 A
75
*
200
200
1,200 A
100
*
200
200
1,600 A
125
*
200
200
2,000 A
150
*
200
200
* Special permission is required prior to construction approval for
motors larger than those indicated in the table. Please contact
EDTI Customer Engineering Services for more information.
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TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 6:
Residential and Multi-Family Underground
Services – Acceptable Conductors
UNDERGROUND 1 PHASE SECONDARY (TYPE USEB CABLE)
SERVICE SIZE
(AMPS)
NUMBER/TYPE OF CABLES
100 A
1 – 1/C #1/0 AL XLPE 600 V (typical 100 A residential service cable since 2011)
150 A
1 – 2/C #2/0 AL XLPE 600 V
200 A
1 – 2/C #4/0 AL XLPE 600 V
300 A
2 – 2/C #2/0 AL XLPE 600 V (parallel)
400 A
2 – 2/C #4/0 AL XLPE 600 V (parallel)
Maximum 6 cables per phase
Cables on all residential and multi-family developments must be concentric-neutral
direct-buried type (USEB). The most recent specifications for secondary cables
are available on request. Check with EDTI Customer Engineering Services for the
cable that must be installed for each site.
In underground residential distribution areas, the standard service size is 100 amps.
The area developer may have installed larger cable (i.e. 2/C #2/0 or 2/C #4/0 XLPE
AL 600 V) to compensate for voltage drop. Cable size does not necessarily indicate
the size of service that is available. Contact EDTI’s Customer Engineering Services
for confirmation on all services larger than 100 amps.
•2/C # 2 XLPE USEB 600-volt cable was the standard 100 amp service cable in EDTI’s
system until 2011. This cable is only allowed for use in those locations where it was
installed at the time of area development.
•For services in which more than 30 metres of cable is required on private property (from
property line to the meter socket), contact EDTI’s Customer Engineering Services to
confirm voltage drop requirements.
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4.27DRAWINGS
DRAWING 2:
Typical Underground Residential Service
Installation on Property
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DRAWING 10:
Sample of Submission for Multi-Family Developments
(FOR EXAMPLE PURPOSES ONLY)
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DRAWING 15 - PART 1:
Typical Underground Residential Service
Installation Four Party Trench
(Power Gas Phone & CATV)
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DRAWING 15 - PART 2:
Typical Underground Residential Service
Installation Four Party Trench
(Power Gas Phone & CATV)
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DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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5.0
PRIMARY
METERED
SERVICE
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5.1
General Introduction
•
A primary metered service is a service above 750 volts phase to phase.
•Typical installations include very large commercial applications where the demand load will
exceed 2,500 KVA to one building, an industrial lot with a single customer, or a commercial
lot with a single customer.
•Please see Table 1 for a summary of your responsibilities as the customer and the
responsibilities of EPCOR Distribution and Transmission Inc. (EDTI).
•If you decide you require a primary metered service, please complete the Commercial
Application Form and email it to ces@epcor.com.
•See the Additional Information Section (9.0) to learn about such topics as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find, but we strongly
suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
5.2 Time Frames
•
In areas where off-site servicing exists, the minimum lead time for a primary service
connection is six months to one year. Lead time for ordering some primary service
equipment can be up to one year after servicing details are finalized, the Customer
Acceptance portion of the estimate letter is returned, and prepayment is made.
5.3 Standard Supply Voltages
•The service size allowed is governed by many factors. Please contact EDTI Customer
Engineering Services.
•5 KV primary metered services are not permitted. If you’re in a 5 KV area, please contact
us for information on conversion to 15 KV. Refer to Drawing 23 for the primary voltage in
your area, and contact us for confirmation.
5.4 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for installing and operating the service connection. We are not required to start
or continue operation of a service connection unless the customer has complied with the
licensing requirements of EDTI and all other authorities.
•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
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•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must also be inspected before the trench is backfilled. Please contact the City of
Edmonton to arrange for inspections. A service connection will not be energized unless
you have inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
5.5 Service Connection Agreement
•We require the customer to sign the Customer Acceptance portion of the estimate letter
as confirmation of intent to proceed with construction. This is required before we finalize
the design and issue work orders.
•We may require the customer to sign a Construction Commitment Agreement, Electric
Service Agreement, and/or Interconnection Operating and Maintenance Agreement.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
5.6 Basic Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting a primary metered service must submit a copy of the following:
-
Commercial Application Form.
-Architectural site plan.
-Engineer-approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines on private property.
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI’s record system and must be submitted in PDF and
AutoCAD or MicroStation format.
•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Locations of planned and existing buildings.
-Size and location of primary conductors on the line (source) side of the meter.
-Size and location of pull boxes.
-Direction of door openings for padmount transformers and cubicles.
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-Location and size of the main distribution panel within the building, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-A detail of the electrical room layout.
-Easements and rights-of-way located on customer’s property.
-Location and description of all other utilities crossing or located within 3.0 metres of
proposed power facilities and conductors.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets, if necessary to meet the readability criteria, as long
as each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned from
the building and property lines and given real-world coordinates. Curb lines may also be included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
5.7 Switchgear Submission Drawings
Submitted drawings must include:
•A site plan containing the duct routing for the main feeder, including location and angle of
bends, corner-to-corner distance between bends, any changes in elevation and detailed
manhole drawings (including drainage).
•Complete single-line diagrams showing interlock, all instrument and power transformers,
fuses, relays, megavolt-amps (MVA) rating of customer switchgear, standby generation,
transformer sizes, and types of winding, as well as other appropriate information. The
control and protection schematic should show the breaker direct current (DC) control
wiring, the transfer scheme between the main feeder, the standby feeders, and the pilot
wire contacts, where required.
•Plans showing the switchgear layout in the electrical room, duct and cable routing, and
details of EDTI Customer Engineering Services’ cable termination cell.
•Shop drawings of the proposed switchgear. Note: Switchgear must be approved for
service entrance.
•Switchgear and electrical room layout details, including provisions for pilot wire relaying,
where required.
•Three sets of main breaker specifications and operating conditions.
•Confirmation of the DC power supply for EDTI’s pilot wire relay, if applicable.
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5.8 Horizontal Clearance to Other Utilities
The following horizontal clearances to other utilities from underground service lines and
equipment, including padmount transformers, switching cubicles, guardrails, and ground grids,
must be maintained:
COMMeRCIAL INSTALLATIONS
•
Poles on Private Property and Primary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The primary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
ReSIDeNTIAL INSTALLATIONS
•
Poles on Private Property and Primary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The primary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
5.9 Service Entry Point
•It is critical that you contact us for your site-specific service entry point (the point where
EDTI’s infrastructure meets your property line) or service pole before beginning
construction. The service entry point can differ due to a number of circumstances.
5.10 Electrical Room
•Service equipment must be located in a separate electrical room of adequate size. The
electrical room must only contain electrical equipment and no other facilities, such as gas
and water equipment.
•A detail of the electrical room layout must be submitted for EDTI approval.
•See the Metering Section (8.0) for more detail.
We have specific servicing details for the Quarters Downtown Development area. If your
development is in the area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, contact us for these details.
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5.11Main Switch or Breaker Minimum
Interrupting Capacity
•The interrupting capacity of main switches and breakers must be sized according to Table 3.
•The minimum interrupting capacity applies to all service entrance equipment.
5.12 Maximum Horsepower of Motors
•The maximum horsepower of motors permitted is identified in Table 2.
•Special permission is required prior to construction approval for motors larger than those
indicated in Table 2. Please contact EDTI Customer Engineering Services for more information.
5.13 General Service Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•The customer is responsible for the installation and maintenance of all civil work on
private property, including maintaining the level of equipment. Civil work typically includes
trenching, ducting, transformer or cubicle pads, ground grids, guardrails, pull boxes, and
intermediate service poles. Please see Table 1 for more information.
•The customer is responsible for installing meter bases on private property.
•EDTI owns and installs all equipment on public property.
•EDTI retains ownership of transformers, switching cubicles, and primary cables on the line
side (source side) of the meter.
•Only EDTI or its authorized agents can operate or maintain any electrical facilities owned
by EDTI.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•The customer must ensure that loading is balanced across all three phases of the service
and that the load is balanced across all main feeders, if there is more than one feeder.
•The customer must provide space and easements for utility equipment to maintain
flexibility of the power system, if required by EDTI. See the Easement Agreement Section
(9.5) for more information.
•Connections and disconnections must be done by EDTI or its authorized agents.
•EDTI Customer Engineering Services will not permit the installation of service lines
crossing public property between private properties.
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5.14 Trenching and Backhoe
•
ll proposed cable routing and duct work is subject to written approval by EDTI
A
Customer Engineering Services prior to construction.
•As the customer, you are not permitted to do any excavation work on City of Edmonton
property, but you must provide all trenching on your property.
•Underground service lines must be kept a minimum of 1.0 metre from the edge of the
property line.
•The customer’s contractor cannot trench within 1.0 metre of any EDTI wood pole, anchor,
transformer, or switching cubicle ground grid (2.0 metres from the edge of the concrete
base), power pedestal, or energized cable. The facilities must be located first using hydro
excavating or hand digging before determining where the mechanical excavation limits end.
•Ensure that the trench is a minimum of 1,000 millimetres to a maximum of 1,200 millimetres
below finished grade and that the service cable is set on undisturbed soil that is free from
rocks, debris, and sudden grade changes. If there are large lumps of clay and soil that
have hardened due to drying or freezing, and when a backhoe has been used for electrical
service installation, a 150 millimetre layer of sand must be placed below the cable. For all
service installations, a 300 millimetre layer of sand must be placed above the cable.
•The customer must backfill all trenches with material that is free of stones and items with
sharp edges.
•Backfill must be placed in uniform lifts not exceeding 300 millimetres and compacted to
the City of Edmonton Design and Construction Standards Volume 2 – Roadways.
•If a trench has been backhoed, cables must be shaded with 300 millimetres of sand.
Backhoed material cannot be placed over cable.
•Backfill material over cable can be the material trenched using a mechanical trencher, if the
inspector deems the material suitable. Soil with high thermal resistivity containing large
amounts of organics, peat, black loam, sod, hardened clay, stones, straw, snow, or frozen
material will not be acceptable. All backfill material is subject to the inspector’s approval.
Sand or clean backfill material must be substituted for unsuitable backfill.
•A marker tape must be installed 0.5 metres above all underground electrical conductors.
•The trench must take the most direct route to the meter base location.
•Some work may be required over energized primary or secondary cables. This may involve
crossing or over trenching the cables. Mechanical excavation is allowed up to 1.0 metre
from the energized facilities. The facilities must first be located using hydro excavating or
hand digging before determining where the mechanical excavation limits end.
•EDTI Customer Engineering Services will allow a contractor to over trench up to 5.0 metres
of energized facilities by hand or hydro excavating. Follow Alberta One-Call procedures and
contact us before starting work.
•Exposed energized cables cannot be left unattended. If the excavation is narrow or small,
the primary cable must be covered with soil bags or secured with some other suitable
temporary method. Contact us for more details.
•Under no circumstances can energized primary cables be moved or handled in any way.
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5.15 Service Ducts
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•
All permanent commercial services must be in duct.
•The customer will provide all conduits (rigid PVC, DB2, Carlon Borguard, Terracon, or other
EDTI-approved ducts only), pull boxes, and manholes required on the customer’s property
for installing the electrical services.
•The customer must supply and install a spare conduit between the service entrance point
and switchgear to accommodate the replacement of the conductor in the event of a cable
fault.
•We highly recommend that, when possible, you take all necessary steps to avoid installing
high-voltage cables under buildings.
•Conduit size requirements for primary (high-voltage) cables depend on cable size and
voltage. Contact EDTI Customer Engineering Services for the primary voltage in your area.
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
•Service conduits installed by contractors working on behalf of other utilities or the City
of Edmonton must follow EDTI Customer Engineering Services’ construction standards.
Contractors must not work within 1.0 metre of any electrical equipment.
•Where EDTI’s conduits have been stubbed to the property line, the customer must first
confirm that the conduit exposed is the correct one, and then connect their supply conduit
to EDTI’s conduit. Contact us to arrange for conduit verification.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed. See Section 5.17 for more information.
5.16 Duct Bends
•All bends exiting cubicles must be made of rigid, thick-walled PVC (schedule 40) with a
minimum wall thickness of 6.0 millimetres for 4 inch, 6.6 millimetres for 5 inch, and 7.1
millimetres for 6 inch. DB2 bends are not acceptable.
•An additional 10 foot horizontal section of rigid, thick-walled PVC must be attached to the bend.
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
•All bends that EDTI must supply conductors for must be equipped with bell collars to avoid
damaging the cable.
•All spare bends are to be covered (taped or covered by some other suitable method) to
prevent material falling into them.
•Primary ducts exiting switching cubicles must be identified (i.e. which piece of equipment
the pipe services).
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5.17 Ground-Mounted Pull Boxes
•EDTI Customer Engineering Services reserves the right of final approval of the pull box size
and location prior to construction.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed. See Drawing 1.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree
bends, as per Canadian Electrical Code Rule 12-940.
•Contact us to perform a cable pulling calculation for your specific site.
•The size of ground-mounted pull box you require depends on the type of cable being
installed.
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box
standards.
•Conduits must enter and leave the pull box at the same level.
•Communication cables cannot share the same pull box with primary cables.
•Customer-owned facilities cannot share the same pull box with EDTI facilities.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will own the cable. See the Equipment Access Section (5.19) for more
information.
•Rigid, thick-walled PVC (schedule 40) with minimum wall thickness of 6.0 millimetres for 4
inch, 6.6 millimetres for 5 inch, and 7.1 millimetres for 6 inch must be installed for the first 10ft
when entering/ exiting any pull boxes, manholes, or vaults. DB2 bends are not acceptable.
5.18 Pull Boxes in Buildings
•EDTI Customer Engineering Services reserves the right of final approval of the pull box size
and location prior to construction.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed.
•Contact us to perform a cable pulling calculation for your specific site.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree
bends, as per Canadian Electrical Code Rule 12-940.
•Pull boxes in buildings must be sized according to EDTI requirements. Contact us to
discuss your specific installation.
•See Table 4 for information on primary cable dressing and pulling radius.
•Communication cables cannot share the same pull box with primary cables.
•Customer-owned facilities cannot share the same pull box with EDTI facilities.
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5.19 Equipment Access
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI Customer Engineering Services will be installing the cable.
•Access to equipment must be provided from private property. Without special permission
from EDTI, public roadways or laneways are not acceptable for access to equipment on
private property.
•Equipment must be placed beside a 4.6 metre wide access roadway, centred in an
unimpeded 6.5 metre area. The area must be capable of supporting an 18,000 kilogram
truck, plus a transformer weighing up to 6,900 kilograms (transformers must be unloaded
from the side of the vehicle). Outriggers on the truck also must extend to a width of
6.07 metres.
•Switching cubicles must be placed in a location that does not exceed maximum setbacks
from driving surfaces, as outlined in Table 5B.
•Any overhang or other obstruction over the access roadway, such as a sign, must have a
minimum of 5.0 metres of vertical clearance.
•If access is through a locked enclosure, the customer shall provide double lock capability
on the gate to accommodate an EDTI lock.
•Equipment must be placed in a location where it will not create a line-of-sight concern for
traffic or pedestrians.
5.20 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI Customer
Engineering Services personnel, our personnel will leave the site until the issues are
rectified.
5.21 Switching Cubicles
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will be installing the cable. See the Equipment Access Section (5.19) for
more information.
•Switching cubicles must be placed in a location that does not exceed maximum setbacks
from driving surfaces, as outlined in Table 5B.
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•Switching cubicles must be connected to EDTI’s main line in such a manner as to provide a
loop feed. No radial-fed cubicle installations will be allowed on private property.
•We will supply, install, and maintain required switching cubicles on EDTI’s side of the point
of service (main breaker). We will also perform all required primary conductor terminations
at the switching cubicle and main switchgear.
•When a switching cubicle is required on the customer’s property, the customer provides
the precast concrete bases with an appropriate ground grid and guardrails for transformers
and switching cubicles to meet EDTI’s specifications.
•When the customer is required to install a cubicle base, we will provide a detailed drawing
showing how the base must be constructed. We will also tell you the type of cubicle base
to install to ensure the correct base is selected. As an example, for a 200- amp cubicle
with three-fused compartments, a 600 amp cubicle base is required. Please see Drawings
4 and 5.
•The fault indicator lights adjacent to the “B” compartment of switching cubicles must face
the main road. Exceptions to this rule must be approved by EDTI Customer Engineering
Services prior to construction approval.
•Excavation for bases should be stepped so the native backfill is not disturbed under the
ground gird area. This will help prevent rods from bending and deformation of the ground
grid during the backfilling/compaction process (i.e. the area where the ground grid and rods
are installed should not be dug to the depth required for the base excavation).
•The bottom of the excavation where the base will be installed requires 300 millimetres of
compacted three-quarter-inch road crush (20 millimetres crushed gravel).
•Proper tamping is crucial to ensuring transformer and cubicle bases are installed correctly.
Ensure that three-quarter-inch road crush is tamped in one-foot lifts. See Drawings 4 and
5.
•EDTI Customer Engineering Services reserves the right to request compaction tests from
the customer.
•2 × 10 pressure-treated lumber is required under all switching cubicle and 1-phase
transformer bases. See Drawings 4 and 6.
•If conditions do not support a precast base, piles must be poured. Engineered drawings
stamped by a civil engineer must be supplied to EDTI Customer Engineering Services prior
to approval.
•Within 3.0 metres of padmounted equipment, landscaping must slope away from the base
at a 2 percent grade (no more or less) to allow for proper drainage and safe operational
switching.
•3.0 metres of working space without obstructions that could interfere with high-voltage
switching—such as rocks, decorative boulders, trees, and fences—must be allowed
for on the door sides of transformers and switching cubicles. Examples of appropriate
landscaping are sod, asphalt, wood chips, and concrete. Please note that switching
cubicles have two sets of doors.
•Curbs within 3.0 metres of the door sides of transformers and switching cubicles must be
approved by EDTI Customer Engineering Services prior to construction.
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•Equipment must not be subject to flooding under runoff conditions.
•The height of the top of the concrete base must be between 250 and 300 millimetres
above finished grade.
•When a new switching cubicle base is installed on private property, the customer must
install a pull string between the cubicle and the customer’s switchgear.
•Customers are responsible for maintaining all transformers and switching cubicle bases
installed on their property, including maintaining the level of equipment.
•When padmounted equipment is to be located on top of a parkade, detailed drawings
under the seal of a registered professional engineer practising structural engineering need
to be submitted for EDTI approval. We highly recommend taking all necessary steps to
avoid this form of construction.
5.22Ground Grids and Guardrails for
Padmounted Equipment
•Transformers and switching cubicles must be protected from mechanical damage in
accordance with Canadian Electrical Code, Part I, Rule 26-240(4). Customers are required to
provide guardrails for all installations of transformers and switching cubicles on private property.
•Guardrails must have removable sections in front of the doors of equipment, as per
Drawing 9. Please note that switching cubicles have two sets of doors.
•Customers are also responsible for installing ground grids around all padmounted
equipment. They must consist of four copper-clad ground rods interconnected by #4/0 bare
copper grounding conductor and an additional 2 X #4/0 bare copper grounding conductor
tails, connected to the ground bus of the equipment.
•A sufficient length of #4/0 bare copper grounding conductor must be installed to allow
3.0 metres (no more or less) to be left above the top of the precast transformer base. The
conductor must be left in an organized manner to allow for easy removal and shaping.
•Ground rod resistance must measure 6 ohms or less.
•The minimum distance to the property line for the ground grids of padmount transformers
and switching cubicles is 1.0 metre.
•If non-EDTI equipment is placed within 3.0 metres of the edge of EDTI equipment, the
ground grid of the EDTI equipment must be bonded using two tails to the ground of the nonEDTI equipment. The customer must show details on the power plan of how the bonding
is to be achieved. The detail must also show the clearance between the edge of the EDTI
equipment and the non-EDTI equipment. The non-EDTI equipment cannot be installed
within 1.0 metre of the EDTI ground grid. It also can’t be located within the guardrails.
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•Ground grids for padmount equipment located on the top of a parkade must be bonded
to the rebar of the building with two 4/0 conductors terminating to a remote ground grid.
These conductors must be physically separated. The equipment base must be encircled
by a #4/0 bare copper conductor embedded in the concrete 900 millimetres outside of
the base. The gradient control conductor must be bonded to the rebar in the four corners,
with two tails from alternate corners entering the base and extending 3.0 metres above
the top of the base. Detailed drawings under the seal of a registered professional engineer
practising electrical engineering need to be submitted to EDTI Customer Engineering
Services for approval.
•Fine fill clay backfill is required around the ground grid.
5.23Conductors
•See Drawing 23 for primary voltage and Table 4 for primary cable, duct, and pull box standards.
5.24 Cable Installation
•EDTI will supply and install all primary conductors in the customer-prepared conduit after
the primary ductwork has passed an electrical inspection. Multi-family sites are an
exception to this rule.
•We will terminate primary conductors to EDTI’s side of the customer’s main breaker.
•If cable pulling lengths exceed the maximum pulling tension of the cable, a pull box must
be installed. See Table 4 and the Pull Box Sections (5.17 and 5.18) for more information.
•Telephone and television cables can be installed in the same trench as power conductors.
When this is considered, design drawings must be forwarded to the appropriate
organizations for their approval.
•Cable cannot be installed on building footings or weeping tile.
•Primary cable ends must be wrapped with elastomeric tape (e.g., Greenline) to prevent
the migration of moisture in the cable prior to testing. Elastomeric tape must be wrapped
in a spiral shape overlapping half of each previous wrap at a time and then covered with
black low-voltage vinyl tape. A minimum of two layers of half-lapped tape is to be applied.
Immediately after testing, primary cable ends must have heat shrink caps installed.
•If a switching cubicle base is installed, the customer must install a pull string between the
cubicle and primary switchgear.
•EDTI will make the final connection in the cubicle, transformer, or pedestal.
•The maximum length of service conductors permitted in a building is 3.0 metres, unless
they are mechanically protected in rigid metal conduit, in which case the maximum length
is 7.5 metres.
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5.25 Coordination Study
A coordination study, certified by a registered professional engineer, is to be submitted to EDTI
Customer Engineering Services for approval. The study must include the following information:
•Two sets of drawings, one for phase current and the other for residual current, plotted on
“log-log” graph paper
•EDTI’s relay time / current characteristics that are provided by the utility to the customer
•Relay time / current characteristics at the customer’s incoming feeder and at least one
level downstream from the incoming feeder
•Types of relays with proposed settings, size, and type of fuses (ANSI type)
•Size and characteristics of any other protective devices
•Single-line sketch indicating the protective elements covered by the study
5.26Switchgear
•Switchgear must be approved for service entrance.
•All enclosures housing live parts on the line side of the main breaker must bear a warning
sign stating “access limited to EPCOR Distribution only” re: 36.006 of the Canadian
Electrical Code.
•Precautionary measures are to be taken to prevent water entering the top-connected
switchgear.
•Circuit breakers or power fuses must be installed as per Primary Services in Table 4.
•If the customer’s connected load will be above 3 MVA, breakers must be provided instead
of loadbreak switches.
•The customer must provide and maintain overcurrent protection in accordance with
Section 14 and Rule 36-204 of the Canadian Electrical Code, Part I.
•Protection devices must be verified and acceptable to EDTI Customer Engineering
Services to ensure compatibility with our distribution system’s overcurrent protection.
•The customer must provide space for and install EDTI-supplied revenue metering and
current and potential transformers in the customer’s switchgear on the load side of the
main breaker.
•Space must also be provided within the customer’s switchgear for terminating the
primary feeders.
•The customer must provide for pilot wire relaying and associated instrumentation
transformers, if deemed necessary by EDTI Customer Engineering Services.
•A permanent, legible, single-line diagram of the switchgear and operating instructions
will be provided by the customer. It must be under a frame of glass in a conspicuous
location within sight of the switchgear. The markings on the switchgear must crossreference the diagram.
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•The customer is responsible for providing regular maintenance on all facilities on their side
of the point of service and keeping a record of maintenance. Proof of maintenance must be
provided upon our request.
•Automated or manual transfer to the standby feeder will be permitted on a “break before
make” scenario. Switching between feeders requires permission from EDTI’s Control Centre.
•EDTI Customer Engineering Services has the right to examine and confirm all proposed
settings of the customer’s protection equipment to ensure compatibility with our
protection devices.
•We reserve the right to determine whether pilot wire relaying is required on the service.
We also have the right to witness all commissioning of the new service.
5.27 Breaker Specifications (Main Service)
•Breakers must have a maximum total clearing time of five cycles.
•Protection and alternating current (AC) tripping-current transformers must have adequate
ratings to operate the relays, and be designed to function properly under maximum fault
conditions.
•A direct current (DC) supply, from storage batteries, must be provided for tripping the
13.8 KV and 25 KV circuit breakers on the main incoming feeders from EDTI’s distribution
system. Battery control power must comply with Rule 14-308 of the Canadian Electrical
Code Part I.
5.28Protection and Control Requirements
(Overcurrent Protection)
•The customer will provide overcurrent protection on electrical systems on the customer’s
side of the point of service, in accordance with the Canadian Electrical Code, Part I.
•A protection Coordinating Time Interval (CTI) of 0.3 seconds for relays and 0.2 seconds for
fuses is required.
•Phase and residual overcurrent relays with instantaneous and inverse time characteristics
are required on the main breaker.
•To coordinate with EDTI’s system relays, the relay curves cannot exceed:
-On the 25 KV system, the equivalent of an EEI-NEMA #100 K fuse
-On the 15 KV system, the equivalent of an EEI-NEMA #140 K fuse
If the requirements noted above cannot be achieved, contact us to discuss possible alternatives.
5.29 Protection with Pilot Wire Relaying
In general, this is a requirement for dedicated feeders. When we require pilot wire relaying, the
customer will do the following:
•Supply and install a 53 millimetre (2-inch) conduit from the service entry to the
main breaker.
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•Supply and install three 600/5-amp, 15 KV or 25 KV current transformers (relaying accuracy
class 2.5L400) per feeder. These are installed on the load side of the main breaker and the
revenue metering transformers, but before the isolating switch.
•Provide test blocks for pilot wire relay current transformers and trip output blocking as
specified:
-For the pilot wire relay, ABB FT-1 style No. 188A 229 G01
-For the trip output blocking, ABB FT-1 style No. 129A 539 G01 with red handles
•Include provisions for our relays to trip and electrically block closing of their main breakers
•Supply a nominal 129 volt, direct current, 1 amp (129V, DC, 1A), continuous output,
ungrounded power supply. Battery control power must comply with Rule 14-308 of the
Canadian Electrical Code Part I.
•Ensure a 650 millimetre wide by 650 millimetre high by 300 millimetre deep space remains
in front of the instrument compartment of the main breaker cell. This is for EDTI to cut a
hole and mount the relays.
•Provide space near the entry point of the 53 millimetre (2 inch) pilot wire conduit into the
electrical room. The space is required for installing cabinets and boxes containing pilot wire
relaying equipment.
5.30 Aerial Services
•EDTI Customer Engineering Services will only allow aerial industrial service connections in
special circumstances. To verify whether your service connection applies, contact us.
•Installation must comply with Part 1 of the Canadian Electrical Code and the Alberta
Electrical Utility Code.
•Please see the Aerial Service Section (3) for more information related to overhead services
and Table 1 for an overview of responsibilities.
5.31Commissioning
Prior to commissioning of the electrical service, the customer must submit the following to EDTI
Customer Engineering Services, in writing and under the seal of a registered professional engineer:
•As-built drawings
•Confirmation of the operational readiness of the main service equipment
•Test reports on the customer’s protection equipment, verification of transfer characteristics
of the main breakers, and confirmation that a key-interlock system is safe and functional
•Field calibration tests on the overcurrent relays with verification of the response time for
1.5, 6, and 20 times the tap setting
•Field saturation checks on the current transformers:
-Field saturation checks on the current transformers and measurement of the direct
current (DC) resistance burden on each current transformer.
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•Confirmation of the DC power supply for EDTI’s pilot wire relay
•Confirmation that trip checks will be performed from protection schemes to circuit
breakers prior to energization
•Confirmation that load and vector checks will be performed at the relay terminals upon
energization of the electrical service
EDTI Customer Engineering Services reserves the right to witness all checking and testing, and
meet with the customer’s operator to confirm the rules for operating the main incoming feeder.
5.32 Service Interruption
•While we make all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI, EDTI has the right to disconnect or otherwise curtail,
interrupt, or reduce Distribution Tariff Service to customers whenever EDTI reasonably
determines, or is told by the Alberta Electric System Operator, that such a disconnection,
curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
5.33 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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5.34TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 1E:
CONNECTION
PRIMARY MeTeReD
SeRVICe (AeRIAL)
This is an overhead
service above
750 volts phase
to phase. Typical
installations include
very large commercial
applications
where the demand
load will exceed 2,500
KVA to one building,
an industrial lot with a
single customer, or a
commercial lot with a
single customer.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Install all poles, anchors,
and wire on the load side
of the service connection
point.
Install poles, anchors, and
wire on the line side of the
service connection point.
NOTE: The customer
owns and maintains all
poles, anchors, and wire
on the load side of the
service connection point.
Supply and install CTs and
PTs.
SERVICE
CONNECTION
POINT
Second pole
past the load
side of the
primary meter
structure
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
First pole past
the load side of
the primary meter
structure (GI pole)
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all poles,
anchors, CTs, and PTs
on the line side of the
point of service.
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TABLE 2:
Maximum Horsepower of Motors Permitted
RATING OF
MAIN SERVICE
CONDUCTORS
(AMPS)
208Y
VOLTS
240 VOLTS
3-PHASE
480Y
VOLTS
600Y
VOLTS
100 A
10
10
25
30
200 A
20
20
50
50
300 A
30
30
75
100
400 A
40
40
100
125
600 A
60
*
150
200
800 A
75
*
200
200
1,200 A
100
*
200
200
1,600 A
125
*
200
200
2,000 A
150
*
200
200
* Special permission is required prior to construction approval for
motors larger than those indicated in the table. Please contact
EDTI Customer Engineering Services for more information.
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TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 4 - PART 1:
Primary Cable, Duct, and Pull Box Standards
MINIMUM BENDING
RADIUS FOR CABLE
(MILLIMETRES)
IN-GROUND
PULL BOX
DETAILED
DRAWING
NUMBER
VOLTAGE
(KILOVOLTS)
DRESSING
PULLING
CONDUIT SIZE
(MILLIMETRES)
MINIMUM
RADIUS OF
DUCT BENDS
(MILLIMETRES)
1-1/C 1/0 AL XLPE
CN-J
15 kV
329 mm
493 mm
100 mm (4”)
610 mm (24”)
Drawing #1
– Page 1
3-1/C 1/0 AL XLPE
CN-J
15 kV
329 mm
493 mm
100 mm (4”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C 500 MCM Cu
XLPE CN-J Triplexed
15 kV
578 mm
823 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3-1/C 750 MCM Cu
XLPE CN-J Triplexed
15 kV
684 mm
908 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3-1/C 750 MCM Cu EPR
LC Shield – J Triplexed
15 kV
631 mm
899 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
1-1/C #1/0 XLPE AL
25 kV
380 mm
571 mm
125 mm (5”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C #1/0 XLPE AL
25 kV
380 mm
571 mm
125 mm (5”)
915 mm (36”)
Drawing #1
– Page 1
3-1/C 500 MCM Al
XLPE CN-J
25 kV
523 mm
785 mm
150 mm (6”)
915 mm (36”)
Drawing #1
– Page 2
3 -1/C 750 MCM Cu
XLPE CN-J Triplexed
28 kV
762 mm
1087 mm 150 mm (6”)
1,219 mm (48”)
Drawing #1
– Page 2
CABLE TYPE
•EDTI reserves the right of final approval of the pull box size and locations prior to construction.
•Contact EDTI Customer Engineering Services for confirmation of the cable type being installed
for your specific site and to perform a pulling calculation for you.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be installed.
•See Drawing 23 for the primary voltage rating in your area.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree bends,
as per the Canadian Electrical Code Rule 12-940.
•Conduits must enter and exit the pull box at the same level.
•Communication cables cannot share the same pull box with primary cables.
•Please see examples A and B below, showing maximum pulling distances for two standard
installations.
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TABLE 4 - PART 2:
Primary Cable, Duct, and Pull Box Standards
Examples
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5B - SWITCHING CUBICLES
MAXIMUM DISTANCE
BETWEEN THE DRIVING
SURFACE AND THE NEAREST
EDGE OF THE SWITCHING
CUBICLE BASE
9.0 m
SWITCHING
CUBICLE
All except
automated cubicles
•Distances specified are applicable to roadway / parking lot installations only.
•Contact EDTI Customer Engineering Services for setback distances for automated cubicles.
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5.35DRAWINGS
DRAWING 1 - PART 1:
Cable Pull Box Dimension
for 1/0 Primary Cables (1.2 X 1.2 X 1.2M)
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DRAWING 1 - PART 2:
Cable Pull Box Dimension
for 500MCM & Larger Primary Cables
(1.4 X 2.9 X 2.0M)
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DRAWING 4 - PART 1:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 2:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 3:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 4:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
TABLE - SWITCHING CUBICLE PRECAST BASE DIMENSIONS AND PRESSURE
TREATED LUMBER DIMENSIONS
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DRAWING 4 - PART 5:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 4 - PART 6:
Installation of Precast Concrete Base for 4-Way
3 Phase 15kV & 25kV Dead Front Switching Cubicles
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DRAWING 5 - PART 1:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 2:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 3:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 4:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 5 - PART 5:
Installation of Precast Concrete Base
for 4-Way Single Phase 200 Amp 15kV & 25kV
Dead Front Switching Cubicle
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DRAWING 9:
Guardrail Construction Details
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DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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6.0
6.0
NETWORK
SERVICE
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6.1
General Introduction
•A network service is a 120/208 volt or 347/600 volt service connected to EDTI’s network
system. The network area extends from 97 to 110 Street and from 97 to 104A Avenue in
downtown Edmonton. See Drawing 23.
•Typical installations include medium to large commercial applications.
•Please see Table 1 for a summary of your responsibilities as the customer and the
responsibilities of EPCOR Distribution and Transmission Inc. (EDTI).
•
Many of the new buildings in the network area are fed with a primary or padmount
transformer service. If, after consulting with us, you find that this is the case,
please see Choose Your Connection (1.4).
•If you decide you require a feed from EDTI’s network system, please complete the
Commercial or Single Family Residential Application Form and email it to ces@epcor.com.
•See our Additional Information Section (9.0) to learn about such topics as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find what you need, but
we strongly suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
6.2 Standard Supply Voltages
•To see the standard voltages available from EDTI for this type of service, please see the
Select the Service Type That Works for You Section (1.4).
•
New or increased 347/600 volt, 3-phase, 4-wire services fed from the network
system will only be supplied if approved by EDTI Customer Engineering Services.
•Existing 347/600 volt, 3-phase, 4-wire services will continue to be maintained.
•Please contact us to confirm the network voltage available in your area.
•Two or more services of the same voltage will not be supplied to the same premises. An
example would be a 120/240 volt, 1-phase, 2-wire service and a 120/208 volt, 3-phase,
4-wire service.
6.3 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for installing and operating the service connection. We are not required to start
or continue operation of a service connection unless the customer has complied with the
licensing requirements of EDTI Customer Engineering Services and all other authorities.
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•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must also be inspected before the trench is backfilled. Please contact the City of
Edmonton to arrange for inspections. A service connection will not be energized unless
you have inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
6.4 Service Connection Agreement
•We require the customer to sign the Customer Acceptance portion of the estimate letter
as confirmation of intent to proceed with construction. This is required before we finalize
the design and issue work orders.
•We may require the customer to sign a Construction Commitment Agreement, Electric
Service Agreement, and/or Interconnection Operating and Maintenance Agreement.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
6.5 Basic Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting a network service must submit a copy of the following:
-Commercial or Single-Family Residential Application Form.
-Architectural site plan.
-Engineer-approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines on private property.
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI’s record system and must be submitted in PDF and
AutoCAD or MicroStation format.
•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Locations of planned and existing buildings.
-Size and location of secondary conductors on the line (source) side of the meter.
-Size and location of pull boxes.
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-Direction of door openings for padmount transformers and cubicles.
-Direction of doors for padmount transformers and cubicles.
-Location and size of the main distribution panel within the building, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-A detail of the electrical room layout.
-Easements and rights-of-way located on customer’s property.
-Location and description of all other utilities crossing or located within 3.0 metres of
proposed power facilities and conductors.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets, if necessary to meet the readability criteria, as long
as each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned from
the building and property lines and given real-world coordinates. Curb lines may also be included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
6.6Main Distribution Panel Cable
Termination Detail Drawing
•
The customer requesting a network service must submit a copy of the following:
-Layout of the electrical room.
-Service duct and cable routing within the building.
-Details of EDTI’s cable termination cell, including size, shape, and access door locations.
6.7 Horizontal Clearance to Other Utilities
The following horizontal clearances to other utilities from underground service lines and
equipment, including padmount transformers, switching cubicles, guardrails, and ground grids,
must be maintained:
COMMeRCIAL INSTALLATIONS
•
Poles on Private Property and Secondary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. Poles cannot be set within,
and secondary cable cannot cross through, septic fields or Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
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ReSIDeNTIAL INSTALLATIONS
(SINGLe FAMILY AND MULTI-FAMILY UNITS)
•
Poles on Private Property
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields and Minnesota Mounds. Poles cannot be set within,
and secondary cable cannot cross through, septic fields or Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
•
Secondary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The secondary cable cannot
cross through septic fields or Minnesota Mounds.
-2.0 metres to sanitary and storm sewer lines.
-1.0 metre to water lines and cc valves.
-1.0 metre to gas lines.
6.8 Service Entry Point
•It is critical that you contact EDTI Customer Engineering Services for your site-specific
service entry point (the point where EDTI’s infrastructure meets your property line)
before beginning construction. The service entry point can differ, due to a number of
circumstances.
6.9 Electrical Room
•If service capacity exceeds 200 amps, service equipment must be located in a separate
electrical room of adequate size. The electrical room can only contain electrical and/or
communication equipment. It cannot contain mechanical devices, such as gas or water
equipment.
•A detail of the electrical room layout must be submitted for EDTI approval.
•See the Metering Section (8.0) for more detail.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, please contact us for these details.
6.10Main Switch or Breaker Minimum
Interrupting Capacity
•
Due to higher fault levels, services supplied from the network system require
larger interrupting capacities. Please see Table 9.
•The minimum interrupting capacity applies to all service entrance equipment.
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•For temporary services supplied from a permanent transformer, interrupting ratings must
match the available fault currents at the transformer.
•When disconnecting switches are used instead of breakers, high rupturing capacity (HRC)
fuses must be used with switches.
•Form I or Form II fuses may be used, but if Form II fuses are used, adequate overload
protection is required.
•When HRC Form I fuses are used in a standard switch, the switch must be permanently
labelled. The label must read USE ONLY HRC FORM I FUSES.
6.11 Maximum Horsepower of Motors
•
The maximum horsepower of motors permitted is identified in Table 2.
•Special permission is required before construction approval for motors larger than
those indicated in Table 2. Please contact EDTI Customer Engineering Services for
more information.
6.12 General Service Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•The customer is responsible for installation and maintenance of all civil work on private
property, including maintaining the level of equipment. Civil work typically includes
trenching, ducting, transformer or cubicle pads, ground grids, guardrails, pull boxes, and
intermediate service poles. Please see Table 1.
•All service connections under this section must have a fused main switch or main breaker
with adequate interrupting capacity installed on the line side of all equipment. This includes
meters and metering equipment. See the Metering Section (8.0).
•The customer is responsible for installing meter bases on private property.
•EDTI owns and installs all equipment on public property.
•We retain ownership of transformers and secondary cables on the line side (source side) of
the point of service.
•Only EDTI employees or their authorized agents can operate or maintain electrical facilities
owned by EDTI.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•125 amp underground services for residential purposes are not available.
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•In Alberta, residential services are not designed for electric heating as the primary heat
source. If it is to be used as the primary heat source, contact EDTI Customer Engineering
Services prior to construction. The customer may be assessed additional costs based on
the type of upgrades required.
•Typical residential underground services are available at 100 amps. To make arrangements
for service connections greater than 100 amps, contact us.
•Voltage drop calculations are the customer’s responsibility and must be submitted upon
request.
•The customer must ensure loading is balanced across all three phases of the service.
•
Co-generation is not allowed on services connected to EDTI’s network system.
•We will not connect any permanent or temporary service to the City of Edmonton’s
streetlight system.
•The customer must provide space and easements for utility equipment to maintain
flexibility of the power system, if required by EDTI. See the Easement Agreement Section
(9.5) for more information.
•Connections and disconnections must be done by EDTI or its authorized agents.
•EDTI Customer Engineering Services will not permit the installation of service lines
crossing public property between private properties.
6.13 Trenching and Backhoe
•As a customer, you cannot do any excavation work on City of Edmonton property, but you
must provide all trenching on your property.
•
All proposed cable routing and duct work is subject to written approval by EDTI
Customer Engineering Services prior to construction.
•Underground service lines must be kept a minimum of 1.0 metre from the edge of the
property line.
•The customer’s contractor must not trench within 1.0 metre of any EDTI wood pole,
anchor, transformer, or switching cubicle ground grid (2.0 metres from the edge of
the concrete base), power pedestal, or energized cable. The facilities must be located
first using hydro excavating or hand digging before determining where the mechanical
excavation limits end.
•Ensure that the trench is a minimum of 1,000 millimetres to a maximum of 1,200
millimetres below finished grade and that the service cable is set on undisturbed soil that
is free from rocks, debris, and sudden grade changes. If large lumps of clay and soil have
hardened due to drying or freezing, and when a backhoe has been used for electrical
service installation, a 150 millimetre layer of sand must be placed below the cable. For all
service installations, a 500 millimetre layer of sand must be placed above the cable.
•The customer must backfill all trenches with material that is free of stones and items with
sharp edges.
•Backfill must be placed in uniform lifts not exceeding 300 millimetres and compacted to
the City of Edmonton Design and Construction Standards Volume 2 – Roadways.
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•If a trench has been backhoed, cables must be shaded with 300 millimetres of sand.
Backhoed material cannot be placed over cable.
•Backfill material over cable can be the material trenched using a mechanical trencher, if the
inspector deems it suitable. Soil with high thermal resistivity containing large amounts of
organics, peat, black loam, sod, hardened clay, stones, straw, snow, or frozen material will
not be acceptable. All backfill material will be subject to the inspector’s approval. Sand or
clean backfill material must be substituted for unsuitable backfill.
•A marker tape must be installed 0.5 metres above all underground electrical conductors.
•The trench must take the most direct route to the meter base location.
•Some work may be required over energized primary or secondary cables. This may involve
crossing or over trenching of the cables. Mechanical excavation is allowed up to 1.0 metre
from the energized facilities. The facilities must first be located using hydro excavating or
hand digging before determining where the mechanical excavation limits end.
•We will allow a contractor to over trench up to 5.0 metres of energized facilities by hand or
hydro excavating. Follow Alberta One-Call procedures and contact us before starting work.
•Exposed energized cables cannot be left unattended. If the excavation is narrow or small,
the primary cable must be covered with soil bags or secured with some other suitable
temporary method. Contact us for more details.
•Under no circumstances can energized primary cables be moved or handled in any way.
6.14 Service Ducts
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•
All permanent commercial services must be in duct.
•For residential installations, we highly recommend installing any cable that will ultimately
end up under driveways, decks, etc. in duct.
•The customer will provide all conduits (rigid PVC, DB2, Carlon Borguard, Terracon, or other
EDTI-approved ducts only), pull boxes, and manholes required on the customer’s property
for installing the electrical services.
•Service conduits installed by contractors working on behalf of other utilities or the City of
Edmonton must follow EDTI’s construction standards. Contractors must not work within
1.0 metre of any electrical equipment.
•Where EDTI’s conduits have been stubbed to the property line, customers must first
confirm that the conduit exposed is the correct one, and then connect their supply conduit
to EDTI’s conduit. Contact us to arrange for conduit verification.
•If pulling lengths exceed the maximum pulling tension of the cable require, a pull box must
be installed. See Section 6.16 for more information.
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6.15 Duct Bends
•All bends must be made of rigid, thick-walled PVC (schedule 40) with a minimum wall
thickness of 6.0 millimetres for 4 inch, 6.6 millimetres for 5 inch, and 7.1 millimetres for 6
inch. DB2 bends are not acceptable.
•An additional 10 foot horizontal section of rigid, thick-walled PVC must be attached to
the bend.
•All bends that EDTI will supply conductors for must be equipped with bell collars to avoid
damaging cable.
•All spare bends are to be covered (taped or covered by some other suitable method) to
prevent material falling into them.
6.16 Ground-Mounted Pull Boxes
•EDTI Customer Engineering Services reserves the right of final approval of the pull box size
and location prior to construction.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be
installed. See Drawing 1.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree
bends, as per Canadian Electrical Code Rule 12-940.
•Contact us to perform a cable pulling calculation for your specific site.
•The size of ground-mounted pull box required depends on the type of cable being installed.
•Conduits must enter and leave the pull box at the same level.
•Communication cables cannot share the same pull box with secondary cables.
•Customer-owned facilities cannot share the same pull box with EDTI facilities.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will own the cable. See the Equipment Access Section (6.18) for more
information.
•Rigid, thick-walled PVC (schedule 40) with minimum wall thickness of 6.0 millimetres for 4
inch, 6.6 millimetres for 5 inch, and 7.1 millimetres for 6 inch must be installed for the first 10ft
when entering/ exiting any pull boxes, manholes, or vaults. DB2 bends are not acceptable.
6.17 Pull Boxes in Buildings
•EDTI Customer Engineering Services reserves the right of final approval of the pull box size
and location prior to construction.
•If pulling lengths exceed the maximum pulling tension of the cable, a pull box must be installed.
•The accumulative total of all bends between pulling points cannot exceed four 90-degree
bends, as per Canadian Electrical Code Rule 12-940.
•Contact us to perform a cable pulling calculation for your specific site.
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•Pull boxes in buildings must be sized according to EDTI requirements. Contact us to
discuss your specific installation.
•Communication cables cannot share the same pull box with secondary cables.
•Customer-owned facilities cannot share the same pull box with EDTI facilities.
6.18 Equipment Access
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•We require truck access to on-property transformers, switching cubicles, poles, and pull
boxes where EDTI will be installing the cable.
•Access to equipment must be provided from private property. Without special permission
from EDTI, public roadways or laneways are not acceptable for access to equipment on
private property.
•Equipment must be placed beside a 4.6 metre-wide access roadway, centred in an unimpeded
6.5 metre area. The area must be capable of supporting an 18,000 kilogram truck, plus a
transformer weighing up to 6,900 kilograms (transformers must be unloaded from the side
of the vehicle). Outriggers on the truck also must extend to a width of 6.07 metres.
•Any overhang or other obstruction over the access roadway, such as a sign, must have a
minimum of 5.0 metres of vertical clearance.
•If access is through a locked enclosure, the customer shall provide double lock capability
on the gate to accommodate an EDTI lock.
6.19 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI personnel, our
personnel will leave the site until the issues are rectified.
6.20Conductors
•
EDTI Customer Engineering Services will supply and install the secondary cable for
all services connected to EDTI’s network system.
•For network services 400 amps and larger, we will supply and install parallel runs of
network service cable. (One 7/C run is 400 amps, two 7/C runs are 800 amps, three 7/C
runs are 1,200 amps, and four 7/C runs are 1,600 amps.)
•The 7-conductor network service cable is a multiplexed cable rated at 400 amps. It
consists of six #4/0 Cu conductors (two per phase) with one # 500 MCM Cu. XLPE USEI
90 cable neutral.
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6.21 Cable Installation
•
EDTI Customer Engineering Services will supply and install the secondary cable for
all services connected to EDTI’s network system.
•Telephone and television cables can be installed in the same trench as power conductors.
When this is considered, design drawings must be forwarded to the appropriate
organizations for their approval.
•Cable cannot be installed on building footings or weeping tile.
•EDTI will make the final connection in the transformer or ring bus.
•The maximum length of service conductors permitted in a building is 3.0 metres,
unless they are mechanically protected in rigid metal conduit, in which case the maximum
is 7.5 metres.
6.22Termination
•A drawing showing details of EDTI’s cable termination cell, including size, shape, and
access door locations, is required. See Section (6.6).
•The customer’s main switch must be equipped with a sufficient number of solderless
terminals to allow for terminating the appropriate service conductors. See Table 10 for
appropriate conductors.
•The customer’s main disconnect switches must have sufficient #4/0 lugs to accommodate
the number of 4/0 Cu phase conductors required for rating the service.
•We will make all terminations on the line side of the customer’s main switch or breaker.
6.23 Duplex, Triplex, and Fourplex Units
ALL UNITS ON ONe LOT
•Each individual unit in a new multiple dwelling will be served as a separate service, unless
EDTI Customer Engineering Services agrees otherwise.
•If a homeowner’s agreement is in place, one service may be installed to a common
location on the building to service all the units.
•Please contact us to talk about your specific situation.
eACH UNIT ON AN INDIVIDUAL LOT
•Each individual unit in a new multiple dwelling must be served as a separate service,
unless EDTI Customer Engineering Services agrees otherwise.
•We may require additional work at the customer’s expense to ensure no trespass
is created.
•Please contact us to talk about your specific situation.
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BARe-LAND DeVeLOPMeNT
•We require a blanket easement to be registered on the owner’s title in EDTI’s name. See
the Easement Agreement Section (9.5) for more information on easements.
6.24 Service Interruption
•While we take all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI Customer Engineering Services, EDTI has the right to
disconnect or otherwise curtail, interrupt, or reduce Distribution Tariff Service to customers
whenever EDTI reasonably determines, or is told by the Alberta Electric System Operator,
that such a disconnection, curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
6.25 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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6.26TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 2:
Maximum Horsepower of Motors Permitted
RATING OF
MAIN SERVICE
CONDUCTORS
(AMPS)
208Y
VOLTS
240 VOLTS
3-PHASE
480Y
VOLTS
600Y
VOLTS
100 A
10
10
25
30
200 A
20
20
50
50
300 A
30
30
75
100
400 A
40
40
100
125
600 A
60
*
150
200
800 A
75
*
200
200
1,200 A
100
*
200
200
1,600 A
125
*
200
200
2,000 A
150
*
200
200
* Special permission is required prior to construction approval for
motors larger than those indicated in the table. Please contact
EDTI Customer Engineering Services for more information.
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TABLE 9:
Main Switch or Breaker Minimum
Interrupting Capacity – Downtown Secondary
Network Services
This service is only provided to selected customers within the network area. EDTI’s Downtown
Secondary Network ranges from 97 to 110 Street and from 97 to 104A Avenue. Contact EDTI’s
Customer Engineering Services for confirmation of whether your service falls within this area.
120/208 VOLTS
347/600 VOLTS
SIZE OF FUSES OR
BREAKERS (AMPS)
INTERRUPTING
CAPACITY (AMPS)
SIZE OF FUSES OR
BREAKERS (AMPS)
INTERRUPTING
CAPACITY (AMPS)
Up to 2,500 A
100,000 A
Up to 1,000 A
100,000 A
2,501–3,000 A
150,000 A
1,001–1,600 A
100,000 A
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values.
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TABLE 10:
Network Services – Acceptable Conductors
and Conduit Size
SIZE OF CONDUCTOR
(WIRE SIZES)
DESCRIPTION
RATING PER
PHASE (AMPS)
#2 AWG* Cu.**
For 2-phase, 3-wire,
or 3-phase, 4-wire
Cross-link polyethylene insulated
with polyvinylchloride jacket on
conductor
100 A
100 mm
(4”)
#4/0 AWG. Cu.
Cross-link polyethylene insulated
with polyvinylchloride jacket on
conductor
200 A
100 mm
(4”)
7-conductor network
cable consisting of two
#4/0 A.W.G. Cu. per
phase and one 500
MCM*** Cu. XLPE
(USEI 90 cable) neutral
Cross-link polyethylene insulated
with polyvinylchloride jacket on
conductor
400 A or multiples
of 400 A
100 mm
(4”)
CONDUIT SIZE
* American Wire Gauge
**Copper
*** Thousand Circular Mills
•For network services 400 amps and larger, EDTI will supply cable with parallel runs of
network service cable. (One 7/C run is 400 amps, two 7/C runs is 800 amps, three 7/C
runs is 1,200 amps, and four 7/C runs is 1,600 amps.)
•Depending on duct arrangements, pull boxes may be required in the building. For
further information, see the Pull Boxes in Buildings section (6.17).
•The maximum length of service conductor permitted in a building is 3.0 metres, unless
they are mechanically protected in rigid metal conduit, in which case the maximum is
7.5 metres.
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6.27DRAWINGS
DRAWING 1 - PART 1:
Cable Pull Box Dimension
for 1/0 Primary Cables (1.2 X 1.2 X 1.2M)
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DRAWING 1 - PART 2:
Cable Pull Box Dimension
for 500MCM & Larger Primary Cables
(1.4 X 2.9 X 2.0M)
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DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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7.0
7.0
UNMETERED
SERVICE
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7.1
General Introduction
•An unmetered service refers to an unmetered service only available to the City of
Edmonton and communication utility companies.
•Typical installations include streetlights, traffic signals, and small utility services.
•Please see Table 1 for a summary of your responsibilities as the customer and the
responsibilities of EPCOR Distribution and Transmission Inc. (EDTI).
•If you decide you require an unmetered service, please complete the Unmetered
Application Form and email it to ces@epcor.com.
•See the Additional Information Section (9.0) to learn about topics such as temporary
power, splicing, operations, equipment relocation, and pre-inspection checklists.
•The information is divided into sections to make it easier for you to find what you need, but
we strongly suggest that you read all the information before starting.
•If there are any differences between this information and EDTI’s Terms and Conditions,
the Terms and Conditions will govern. In addition, regulations contained in the Canadian
Electrical Code, Alberta Electrical Utility Code, Alberta Safety Codes Act, and Alberta
Occupational Health and Safety Act must be followed.
7.2Availability of Unmetered Service
Connections
An unmetered connection will be allowed, provided it meets all the following
conditions:
•The service connection is for the City of Edmonton or communication utility companies.
•The unmetered load is located within the City of Edmonton road right of way.
•The connected load is small, consistent, and predictable, and electrical consumption can
be easily calculated.
•The standard supply voltage is one of the voltage services available from EDTI Customer
Engineering Services. See the Standard Supply Voltages Section (7.3).
•The maximum current requirements are less than 60 amps per service connection.
7.3 Standard Supply Voltages
•To see the standard voltages available from EDTI for this type of service, please see the
Select the Service Type That Works for You Section (1.4).
•Maximum service limits apply to services within our 15 KV and 25 KV service areas. For
any new or increased services in the 5 KV distribution area, contact us for limits. Refer to
Drawing 23 for the primary voltage in your area, and contact us for confirmation.
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7.4 Permits and Inspections
As a customer, you or your contractors are responsible for:
•Obtaining all permits, certificates, licences, inspections, reports, and other authorizations
necessary for the installation and operation of the service connection. We are not required
to start or continue operation of a service connection unless the customer has complied
with the licensing requirements of EDTI and all other authorities.
•Submitting an electronic copy of the electrical wiring permit, civil electrical inspection (if
required), and final electrical inspection report to EDTI Customer Engineering Services.
•Ensuring that an Electrical Safety Codes Officer inspects all internal wiring before it’s
concealed. All transformer and switching cubicles, ground grids, underground wiring, and
ducts must also be inspected before the trench is backfilled. Please contact the City of
Edmonton to arrange for inspections. A service connection will not be energized unless
you have inspection approval.
•Completing utility searches on private property and notifying Alberta One-Call before any
work is done.
7.5 Service Connection Agreement
•We may require the customer to sign the Customer Acceptance portion of the estimate
letter as confirmation of intent to proceed with construction. This is required before we
finalize the design and issue work orders.
•The customer may be required to make a capital contribution toward the cost of materials
and equipment installed on City of Edmonton property or the customer’s property.
7.6 Basic Drawing Requirements
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•New connection construction cannot start until we have approved all drawings.
•A customer requesting an unmetered service must submit a copy of the following:
-
Unmetered Service Application Form.
-Engineer-approved electrical site plan.
-Mechanical plans showing water, sewer, and gas lines.
•Drawings must be in electronic format and follow accepted drafting standards as indicated
in this guide.
•Drawings will become part of EDTI’s record system and must be submitted in PDF and
AutoCAD or MicroStation format.
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•The following information must be included on these plans:
-All legal property lines.
-Streets, avenues, and any other public thoroughfare abutting the property.
-Locations of planned and existing buildings that may affect servicing.
-Location, size, and type of EDTI equipment, service poles, pull boxes, manholes,
conductors, conduits, metered site lighting, and distribution facilities that may affect
servicing.
-Size and location of secondary conductors.
-Location and size of the main distribution panel within the switchgear, including voltage,
amperage, phase, wire size, temperature rating (i.e. 75 or 90 degree), and type.
-Easements and rights-of-way.
-Location and description of all other utilities crossing or located within 3.0 metres of
proposed power facilities and conductors.
-Drawings at a scale that will maintain the readability of multiple conductors, which can
be submitted as multiple sheets, if necessary to meet the readability criteria, as long
as each sheet is self-contained.
-Electrical permit number and legal address.
-Title, block, border, scale, and legend.
Please note that all equipment and conductor locations on the drawing are to be dimensioned from
the building and property lines and given real-world coordinates. Curb lines may also be included.
EDTI Customer Engineering Services will review and accept drawings and the scope of work.
We will also provide authorization for connection to the EDTI system and identify who can connect.
7.7
As-Built Drawing Requirements
•
Engineer-stamped, as-built drawings are to be forwarded to EDTI Customer
Engineering Services prior to energization.
•As-built drawings are to confirm the customer’s installation, including equipment and
conductor specifications. Equipment and conductor locations are to be drawn to scale. Any
revision to the original design must be indicated on the drawing and dimensioned as such.
•Once construction is complete, submit as-built information to EDTI Customer
Engineering Services.
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7.8 Horizontal Clearance to Other Utilities
The following horizontal clearances to other utilities from underground service lines and
equipment, including padmount transformers, switching cubicles, guardrails, and ground grids,
must be maintained:
COMMeRCIAL INSTALLATIONS
7.9
•
Secondary Conductors
-3.0 metres to all valves, hydrants, catch basins, manholes, vaults, sanitary and storm
sewer lines, septic tanks, fields, and Minnesota Mounds. The secondary cable cannot
cross through septic fields and Minnesota Mounds.
-1.8 metres to all water lines and cc valves.
-1.0 metre to all gas lines.
Servicing Location
•It is critical that you receive approval from EDTI for your site-specific servicing location prior
to beginning construction. This location can differ, due to a number of circumstances.
7.10Main Switch or Breaker Minimum
Interrupting Capacity
•The interrupting capacity of main switches and breakers must be sized according to Table 3.
•The minimum interrupting capacity applies to all service entrance equipment.
•The interrupting capacities indicated are for one service from one matching transformer.
•If a larger transformer is installed to feed several services, the interrupting capacity must
match the total capacity of all services.
•Due to higher fault levels, services supplied from the network system require larger
interrupting capacities. Please see the Network Service Section (6.0) for more information.
7.11 General Service Requirements
•Unmetered services are available from EDTI Customer Engineering Services’ aerial and
underground distribution systems.
•Aerial (overhead) services will not be provided in areas served by underground
electrical facilities.
•Demand load must be less than 60 amps.
•Customers are responsible for maintaining all civil work they install, including maintaining
the level of equipment.
•We retain ownership of transformers, switching cubicles, primary cables, and secondary
cables on the line side (source side) of the point of service.
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•Only EDTI employees or their authorized agents can operate or maintain any electrical
facilities owned by EDTI.
•The customer will designate the service pole, pedestal, or transformer to be used. Our
approval of the servicing location is required prior to construction.
•EDTI Customer Engineering Services will provide the customer with costs for work to be
completed by EDTI.
•Connections and disconnections must be done by EDTI or its authorized agents.
•The customer will comply with the standards set out by the Institute of Electrical and
Electronics Engineers (IEEE) 519-1992 (Table 10.3, 10.4, 10.5) when loads producing
harmonic distortion are involved. The customer will also comply with the short- and longterm flicker limits as specified in Tables 2 and 6 of CAN/CSA-C61000-3-7 Electromagnetic
Compatibility (EMC) – Part 3 – 7.
•Voltage drop calculations are the customer’s responsibility and must be submitted upon
request.
•The customer must ensure the loading is balanced across all three phases of the service.
•We will not connect any permanent or temporary service to the City of Edmonton’s
streetlight system.
•EDTI Customer Engineering Services will not permit the installation of service lines
crossing public property between private properties.
7.12 Trenching and Backhoe
•
All proposed cable routing and duct work is subject to written approval by EDTI
Customer Engineering Services prior to construction.
•For installations other than those installed by EDTI or its authorized agents, the customer
must not trench within 1.0 metre of any EDTI wood pole, anchor, transformer, switching
cubicle ground grid (2.0 metres from the edge of the concrete base), or power pedestal.
•The facilities must be located first using hydro excavating or hand digging before
determining where the mechanical excavation limits end.
•Ensure that the trench is a minimum of 1,000 millimetres to a maximum of 1,200
millimetres below finished grade and that the service cable is set on undisturbed soil that
is free from rocks, debris, and sudden grade changes. If large lumps of clay and soil have
hardened due to drying or freezing, and when a backhoe has been used for electrical
service installation, a 150 millimetre layer of sand must be placed below the cable. For all
service installations, a 500 millimetre layer of sand must be placed above the cable.
•The customer must backfill all trenches with material that is free of stones and items with
sharp edges.
•Backfill must be placed in uniform lifts not exceeding 300 millimetres and compacted to
the City of Edmonton Design and Construction Standards Volume 2 – Roadways.
•If a trench has been backhoed, cables must be shaded with 300 millimetres of sand.
Backhoed material cannot be placed over cable.
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•Backfill material over cable can be the material trenched using a mechanical trencher, if the
inspector deems it suitable. Soil with high thermal resistivity containing large amounts of
organics, peat, black loam, sod, hardened clay, stones, straw, snow, or frozen material will
not be acceptable. All backfill material is subject to the inspector’s approval. Sand or clean
backfill material must be substituted for unsuitable backfill.
•
A marker tape must be installed 0.5 metres above all underground electrical conductors.
•Some work may be required over energized primary or secondary cables. This may involve
crossing or over trenching of the cables. Mechanical excavation is allowed up to 1.0 metre
from the energized facilities. The facilities must first be located using hydro excavation or
hand digging before determining where the mechanical excavation limits end.
•We will allow a contractor to over trench up to 5.0 metres of energized facilities by hand or
hydro excavating. Follow Alberta One-Call procedures and contact us before starting work.
•Exposed energized cables cannot be left unattended. If the excavation is narrow or small,
the primary cable must be covered with soil bags or secured with some other suitable
temporary method. Contact us for more details.
•Under no circumstances can energized primary cables be moved or handled in any way.
•The trench must take the most direct route to the breaker location.
7.13 Service Ducts
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•Cable that will ultimately end up under roads, driveways, decks, etc. must be installed in duct.
•Duct must be installed where cable under EDTI control is deemed inaccessible.
•If required, the customer will provide all conduits (rigid PVC, DB2, Carlon Borguard,
Terracon, or other EDTI-approved ducts only), pull boxes, and manholes required on the
customer’s property for installing the electrical services.
•Service conduits installed by contractors working on behalf of other utilities or the City of
Edmonton must follow EDTI’s construction standards. Contractors must not work within
1.0 metre of any electrical equipment.
•If the conduits of EDTI Customer Engineering Services have been stubbed, customers
must first confirm that the conduit exposed is the correct one, and then connect their
supply conduit to EDTI’s conduit. Contact us to arrange for conduit verification.
7.14 Duct Bends
•All bends exiting transformers and cubicles must be made of rigid, thick-walled PVC
(schedule 40) with a minimum wall thickness of 6.0 millimetres for 4 inch, 6.6 millimetres
for 5 inch, and 7.1 millimetres for 6 inch. DB2 bends are not acceptable.
•An additional 10 foot horizontal section of rigid, thick-walled PVC must be attached to the bend.
•The customer must ensure that all secondary ducts are aligned directly under the secondary
bushings of the transformer and centred within the base opening.
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•All bends that EDTI will supply conductors for must be equipped with bell collars to avoid
damaging cable.
•All spare bends are to be covered (taped or covered by some other suitable method) to
prevent material falling into them.
7.15 Equipment Access
•EDTI Customer Engineering Services reserves the right of final approval for the location of
facilities prior to construction approval.
•We require truck access to transformers, switching cubicles, poles, and pull boxes where
EDTI will be installing the cable.
•Equipment must be placed beside a 4.6 metre wide access roadway, centred in an unimpeded
6.5 metre area. The area must be capable of supporting an 18,000 kilogram truck, plus a
transformer weighing up to 6,900 kilograms (transformers must be unloaded from the side
of the vehicle). Outriggers on the truck also must extend to a width of 6.07 metres.
•Any overhang or other obstruction over the access roadway, such as a sign, must have a
minimum of 5.0 metres of vertical clearance.
•If access is through a locked enclosure, the customer shall provide double lock capability
on the gate to accommodate an EDTI lock.
7.16 Site Housekeeping
•Areas that our crews must access and work in must be clear of construction materials,
equipment, debris, trash, and other materials that may pose a safety risk to personnel or
damage equipment.
•The site must be level and consist of hard-packed material or asphalt.
•If a site has substandard housekeeping or is deemed unsafe by EDTI Customer Engineering
Services personnel, our personnel will leave the site until the issues are rectified.
7.17 Conductors for Underground Services
•
Armoured or metal-sheathed (TECK) cable cannot be used for permanent services.
•Ensure the conductor used is compatible with EDTI conductors on City of Edmonton
property. Table 6 shows standard cable sizes and types allowed.
•With our permission, TECK cable can be used for temporary installations. The customer
must supply all associated fittings, including connectors, grounding bushings, and
weatherheads. See the Temporary Connections Section (9.11) for more details.
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7.18Cable Installation for Underground
Services
•Customers own and are responsible for installing secondary conductors on their side of the
point of service.
•EPCOR will make the final connection in the cubicle, transformer, or pedestal.
•Telephone and television cables can be installed in the same trench as power conductors.
When this is considered, design drawings must be forwarded to the appropriate
organizations for their approval.
•Cable cannot be installed on building footings or weeping tile.
•Secondary cable ends must have heat shrink caps installed.
•We will allow the unmetered service to be energized upon receipt of as-built plan(s), permit(s),
and inspection approval(s). Terminations must be done by journeymen power electricians
and linemen. All workers require certification as qualified electrical utility personnel.
•Customers will supply and install secondary conductors on their side of the point of service,
leaving 3.0 metres (no more or less) of conductors above the top of the precast transformer
base. Then the conductors must be coiled in a clockwise direction and left in an organized
manner around the inside perimeter of the base to allow for easy removal and shaping.
•The phasing of secondary conductors coiled in a transformer must be identified with
marking tape at intervals not exceeding 1.0 metre.
•The customer will identify service conductors by the meter address, by using long-life
ink on a tie-wrap attached to the conductors. This identification is mandatory if there are
multiple service connections or when a customer-owned distribution facility, such as a
pedestal, is used.
•In general, a maximum of six runs of secondary conductors are permitted for all 1-phase
padmount transformers. In some circumstances, additional runs may be permitted.
Contact us to discuss your specific installation.
•In general, a maximum of six runs of secondary conductors are permitted for 3-phase
padmount transformers up to 1,000 KVA. In some circumstances, additional runs may be
permitted. Contact us to discuss your specific installation.
•In general, a maximum of eight runs of secondary conductors are permitted for 1,500- KVA
and 2,500 KVA 3-phase padmount transformers. In some circumstances, additional runs
may be permitted. Contact us to discuss your specific installation.
7.19 Wire Installation for Overhead Services
•EPCOR will make the final connection at the transformer.
•Services exceeding the maximum spans noted in Table 7 may require an intermediate pole,
or the customer will have to redesign the service with an underground system.
•The customer is responsible for installing intermediate poles on private property.
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•EDTI will supply and install up to 30 metres of service wire, according to spans noted
in Table 7, and make all terminations at the weatherhead, once inspection approval is
received.
•The customer’s service conductors, including the portion between the meter base and the
service box (customer’s main disconnect), must meet the requirements under rule 6-302(1)
(a) to (i) of the Canadian Electrical Code, Part I.
7.20Attachment Methods for Overhead
Services
•EDTI Customer Engineering Services reserves the right to request that the attachment
point be adjusted to minimize or eliminate service trespass to neighbouring properties.
•In general, the attachment must be vertical.
•Horizontal attachments may be used to increase clearances, depending on the angle of
pull from the pole. If you’re not sure whether a horizontal attachment can be used, ask the
inspection authority.
•The attachment point for the electrical service must be above any communication services.
7.21 Street Lighting
•The City of Edmonton is the owner and operator of all street light systems within the City’s
road rights-of-way.
•The City of Edmonton reviews developer drawings to ensure that the street light designs
and layouts adhere to standards stated in the most recent publication of the City of
Edmonton Servicing Standards Manual.
•Connection of unmetered facilities to EDTI’s distribution system is subject to EDTI’s Terms
and Conditions and design and construction standards.
•Please ensure that grounding installed for street light disconnect is bonded to ground for
an existing distribution transformer, both underground and on the pole near the disconnect
device.
•For pole-mounted installations, ensure that the new relay installation maintains the required
1.0 metre of clearance from any communication installation.
•To ensure safety, regulatory requirements, and proper recording of system loads and
power consumption, the City of Edmonton must:
-Submit an Unmetered Power Application Form to EDTI Customer Engineering Services.
-Provide the electrical permit number.
-Supply City of Edmonton-approved engineering drawings for the complete street light
installation.
-Give EDTI Customer Engineering Services a complete copy of the street light system
design and layout as-built drawings.
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7.22 Lane Lighting (Back Alley Lighting)
•All new security lighting and additions to existing security lighting systems must be
metered and installed as per Part 1 of the Canadian Electrical Code. To inquire about
existing EDTI security lighting systems, please contact EDTI Customer Engineering
Services. To request disconnection of existing security lighting, first contact the retailer to
have billing stopped, and then contact us.
•Requests for lane lighting must be made by contacting the City of Edmonton.
7.23Security Lighting (Lighting of Public
Areas)
•All new security lighting and additions to existing security lighting systems must be
metered and installed as per Part 1 of the Canadian Electrical Code. To inquire about
existing EDTI security lighting systems, please contact EDTI Customer Engineering
Services. To request disconnection of existing security lighting, first contact the retailer to
have billing stopped, and then contact us.
7.24 Conversion to a Metered Service
•EDTI Customer Engineering Services reserves the right at any time to field-measure the
unmetered service connection. The customer or the customer’s retailer will be notified of the
field-measured consumption recording, as well as of the accuracy of the measuring devices.
•We reserve the right to require any unmetered service to be reconnected as a metered
service connection.
•The cost of reconnection will be at the customer’s expense including an approved meter
base and protective housing.
•We will provide the meter and will notify the customer where the meter base and
protective housing are to be located.
•We will provide 30 calendar days’ written notice that an unmetered service is being
reconnected as a metered service.
•Customers have the option of installing an EDTI-approved meter socket at an acceptable
location and applying for reconnection as a metered service connection.
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7.25 Service Interruption
•While we take all reasonable efforts to guard against interruptions, we do not guarantee
uninterrupted service.
•Without liability of any kind to EDTI, EDTI has the right to disconnect or otherwise curtail,
interrupt, or reduce Distribution Tariff Service to customers whenever EDTI reasonably
determines, or is told by the Alberta Electric System Operator, that such a disconnection,
curtailment, interruption, or reduction is necessary:
-To facilitate construction, installation, maintenance, repair, replacement, or inspection
of any of EDTI’s facilities.
-To maintain the safety and reliability of EDTI’s distribution system.
-Due to any other reason, including dangerous or hazardous circumstances such as
emergencies, forced outages, potential overloading of EDTI’s distribution system, or
force majeure.
7.26 Next Steps
Your next steps are to ensure the metering is installed correctly and to choose a retailer.
Please see Section 8 to choose the type of metering required for your installation. You are free
to choose any retailer. Regulated wires services are not dependent on the retailer you choose.
For a listing of licensed Alberta retailers, visit www.ucahelps.alberta.ca or call 310-4822
(toll-free in Alberta).
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7.27TABLES
TABLE 1:
Project Overview
DEFINITIONS
Service connection point: The point at which the customer’s facilities physically connect to EDTI’s
distribution system to permit the customer to obtain electricity. For an underground service, this could
also be described as the specific point that EDTI’s civil work ends and the customer’s begins.
Point of service: The electrical connection point at which EDTI’s service conductors are connected to
the conductors or apparatus of a customer.
TABLE 1A:
CONNECTION
PADMOUNT
TRANSFORMeR
SeRVICe
This is a groundmounted transformer
located on private
property. Typical
installations
include medium to
large commercial
applications, large
houses, and multifamily sites.
CUSTOMER’S
RESPONSIBILITIES
EDTI’S
RESPONSIBILITIES
Complete civil work on
private property. This
typically includes all
trenching, ducting, pull
boxes, concrete bases for
any padmount equipment,
grounding, and guardrails.
Complete all work on
public property.
Supply and install
secondary cable.
Supply, install, and
terminate all padmount
equipment.
Supply primary cable,
except for multi-family
sites where the customer
supplies the primary cable.
SERVICE
CONNECTION
POINT
Property line
POINT OF
SERVICE
(ELECTRICAL
CONNECTION
POINT)
Property line for
multi-family sites
Transformer for all
other installations
Install CTs and PTs.
Supply CTs and PTs.
Supply the primary cable
on multi-family sites.
NOTE: The customer
owns and maintains
all transformer bases,
switching cubicle bases,
ground grids, primary
ducts, and all secondary
works on private property.
Customer owns and
maintains primary cable
in MFU sites.
Supply and install revenue
metering equipment.
NOTE: EDTI owns and
maintains all transformers,
switching cubicles,
primary cable (except for
MFU sites), and revenue
metering equipment.
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TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 6:
Residential and Multi-Family Underground
Services – Acceptable Conductors
UNDERGROUND 1 PHASE SECONDARY (TYPE USEB CABLE)
SERVICE SIZE
(AMPS)
NUMBER/TYPE OF CABLES
100 A
1 – 1/C #1/0 AL XLPE 600 V (typical 100 A residential service cable since 2011)
150 A
1 – 2/C #2/0 AL XLPE 600 V
200 A
1 – 2/C #4/0 AL XLPE 600 V
300 A
2 – 2/C #2/0 AL XLPE 600 V (parallel)
400 A
2 – 2/C #4/0 AL XLPE 600 V (parallel)
Maximum 6 cables per phase
Cables on all residential and multi-family developments must be concentric-neutral
direct-buried type (USEB). The most recent specifications for secondary cables
are available on request. Check with EDTI Customer Engineering Services for the
cable that must be installed for each site.
In underground residential distribution areas, the standard service size is 100 amps.
The area developer may have installed larger cable (i.e. 2/C #2/0 or 2/C #4/0 XLPE
AL 600 V) to compensate for voltage drop. Cable size does not necessarily indicate
the size of service that is available. Contact EDTI’s Customer Engineering Services
for confirmation on all services larger than 100 amps.
•2/C # 2 XLPE USEB 600-volt cable was the standard 100 amp service cable in EDTI’s
system until 2011. This cable is only allowed for use in those locations where it was
installed at the time of area development.
•For services in which more than 30 metres of cable is required on private property (from
property line to the meter socket), contact EDTI’s Customer Engineering Services to
confirm voltage drop requirements.
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TABLE 7:
Aerial Services – Acceptable Wire and Spans
CUSTOMER’S SERVICE
CONDUCTOR AMPS
WEATHER PROTECTED (WP)
SERVICE WIRE
MAXIMUM ALLOWABLE
SPAN (METRES)
600
# 556.5 MCM
10 m
400
# 336.4 MCM
15 m
300
# 4/0 AWG
15 m
200 (Commercial)
#1/0 AWG Open
30 m
200 (Residential)
# 1/0 AWG Multiplex
30 m
150
# 1/0 AWG Multiplex
30 m
100
# 4 AWG Multiplex
30 m
AWG = American Wire Gauge
MCM = Thousand Circular Mils
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7.28DRAWINGS
DRAWING 23 - PART 1:
Epcor 15kV, 25kV & Downtown Secondary Network
Distribution Area
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DRAWING 23 - PART 2:
Epcor 5kV Distribution Area
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8.0
8.0
METERING
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8.1Commercial Metering –
200 Amps and Less (Socket Style)
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for commercial applications. If you are installing a
different electrical service, please see the applicable metering section.
IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•For single-meter installations where the service voltage is 277/480 volts or 347/600 volts
and 200 amps or less, the meter socket must be installed on the outside of the building
and on the load side of the main disconnect (cold metered).
•For single-meter installations where the service voltage is 120/240, 120/208, or 240 Delta
and 200 amps or less, the meter socket must be installed on the line side of the main
disconnect (hot metered) and on the outside of the building.
•The meter socket for 1-phase services that are 100 amps and larger must be a minimum
of 300 millimetres high, 190 millimetres wide, and 100 millimetres deep so it meets the
minimum bending radius of the aluminum secondary conductors.
•When electrical services are supplied by an underground service conductor larger than
a 1/0 CN, the meter socket must be a minimum of 400 millimetres high, 280 millimetres
wide, and 100 millimetres deep. Smaller meter socket enclosures can only be used for
services of 60 amps or less.
•In multiple-meter installations, each meter must be installed on the load side of its own
lockable disconnecting device, as depicted in Drawing 16. The disconnecting device must
not interrupt service to any other meter.
•The main disconnect device may be either a fused switch or a breaker suitable for service
entry. These disconnects must have the supply voltage clearly marked (e.g. 480 V, 600 V).
This is not applicable to multi-family units and mobile home parks.
•All electrical equipment must bear the evidence-of-approval marking of certification
organizations that are recognized by the Standards Council of Canada and acceptable to EDTI.
•Round sockets may only be used on services using Number 6 American Wire Gauge (#6
A.W.G.) or smaller wire.
•The meter must be placed in a location that we can access at all times.
•Electrical rooms must be located on ground floors, where practical.
•If an electrical room is located on a floor other than the ground floor, it must be accessible
by a proper stairway as defined in the Alberta Building Code. Please refer to the building
code for “private” or “public” stair types. For example, the maximum rise is 200
millimetres, the minimum run is 210 millimetres, the tread depth is a minimum of 235
millimetres, and the width is 900 millimetres. Access by a ladder is not acceptable.
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8.2Commercial Metering –
Greater Than 200 Amps
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for commercial applications. If you are installing a
different electrical service, please see the applicable metering section.
IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•For all transformer-rated services, the meter socket in Drawing 17 must be used. The
socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket
must be CSA-approved.
•The meter socket must be installed on the load side of the main disconnect.
•The meter socket and instrument enclosures must conform to the sizes noted in Table 11.
See Drawing 17 for the meter and test block enclosure.
•The meter socket and instrument transformer enclosure must be connected by a
32-millimetre (1.25-inch) conduit or raceway and should not include any LBs, if possible.
The conduit or raceway must only contain the wires used for the meter installation. The
total length of conduit from the metering transformer to the meter cannot exceed 7.0
metres. The conduit must enter the enclosure as identified in Drawing 19, using
approved knockouts.
•In multiple-meter installations, each meter must be installed on the load side of its own
lockable disconnecting device. The disconnecting device must not interrupt service to any
other meter.
•The instrument transformer enclosure must only contain the metering transformer
installation. The conduit entering the enclosure cannot interfere with the installation of
any of the conductors, the transformer, or the enclosure cover. The conduits carrying the
main service conductors must also enter the enclosure in a way that won’t interfere with
installing conductors to the metering cabinet.
•The metering instrument enclosure must have a hinged access door, or hinged doors to
allow for installing and inspecting meter equipment.
•When a main feeder and a standby feeder are provided to one site, they must be
separately metered. The metering must be installed on the line side of the customer’s
transfer switch.
•Current transformers must be mounted on the inside back wall of the instrument
transformer enclosure and have the polarity marks on the line side, as per Drawing 18.
Mounting must allow for removing the current transformers without needing to remove the
enclosure.
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•Potential transformers should be mounted on the bracket supplied. If no brackets are
supplied, the transformers should be mounted on the back, sides, or bottom of the cabinet
and should be spaced to provide ease of wiring (approximately 10 centimetres).
•Rigid bus and suitable insulators must be used on all services over 600 amps. The bus
must be continuous from the main switch to the current transformers and from the
transformers to sub-switching or splitter bars. When service conductors can be used, a
short piece of rigid bus and suitable insulators are to be connected to either side of the
current transformers. This would require a custom metering transformer enclosure. A
drawing of the enclosure must be submitted to EDTI Customer Engineering Services prior
to construction approval.
•All meter sockets and instrument transformer enclosures must be securely mounted
plumb, level, and clear of all objects, and conform to Drawings 18–20. For multi-meter
installation requirements, please see Drawing 16.
•A 14-millimetre (0.5-inch) conduit wired with a single-pair telephone line must be provided
between the 13-jaw meter socket and main telephone panel, with provisions for a
telephone connection.
•In cubicles containing switches or air circuit breakers over 600 amps, the meter socket
must be mounted remote from the switchboard.
•On outdoor transformer-rated freestanding installations, the meter socket must be
mounted on supports remote from the switchgear.
•Service equipment must be located in a separate room of adequate size, or in a location
that is acceptable to EDTI and the inspection authority. A key for the electrical room must
be provided to the EDTI Meter Reading department. The electrical room cannot contain
mechanical equipment. It must contain electrical and/or communication equipment only.
•The meter must be placed in a location that we can access at all times.
•Electrical rooms must be located on ground floors, where practical.
•If an electrical room is located on a floor other than the ground floor, it must be accessible
by a proper stairway as defined in the Alberta Building Code. Please refer to the building
code for “private” or “public” stair types. For example, the maximum rise is 200
millimetres, the minimum run is 210 millimetres, the tread depth is a minimum of 235
millimetres, and the width is 900 millimetres. Access by a ladder is not acceptable.
8.3 Residential Metering – 200 Amps and Less
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for residential applications. If you are installing a
different electrical service, please see the applicable metering section.
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IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•The customer-supplied meter socket must be a minimum of 300 millimetres high, 190
millimetres wide, and 100 millimetres deep so that it meets the minimum bending radius
of the aluminum secondary conductors.
•When electrical services are supplied by an underground service conductor larger than 1/0
CN, the meter socket must be a minimum of 400 millimetres high, 280 millimetres wide,
and 100 millimetres deep.
•Existing 60 amp services may maintain the use of the round meter sockets only on
services using #6 American Wire Gauge (#6 AWG) or smaller.
•If the service conductors are fed from a customer service pedestal and run to a splitter on
the side of a multi-family unit, the meter sockets fed from that splitter must be individually
cold metered, as per Drawing 16. Rule 6-104 of the Canadian Electrical Code will not apply.
•Notwithstanding the above, when multi-meter assemblies are used, hot metering will be
permitted with the disconnecting device installed on the load side of the utility meter.
•Metering is not supplied on the secondary side of customer-owned transformers. In
multiple-meter installations, each meter must be installed on the load side of its own
lockable disconnecting device, as depicted in Drawing 16. The disconnecting device must
not interrupt service to any other meter.
•It is the electrician’s responsibility to ensure that the numbering of meter sockets matches
the number of individual units.
•If the service conductors are fed from a pedestal and run to a gang-metered socket on the
side of a multi-family unit, they do not have to be individually cold metered. Rule 6-104 of
the Canadian Electrical Code will not apply.
•If the service conductors are fed directly from a transformer and run to a ganged-meter
socket on the side of a multi-family unit, they must be limited to four consumer services on
that building, as stated in Rule 6-104.
•Meter sockets must be located outdoors on the exterior of the house or garage to provide
unimpeded access at all times to anyone installing, changing, testing, or reading the
metering equipment.
•Meter sockets must also be in a location acceptable to the inspection authority and EDTI.
•Meter sockets cannot be recessed into walls, enclosed, boxed in, or otherwise obstructed
in a way that would impede removal, reading, testing, or reinstallation.
•Meter sockets cannot be located in proximity to sundecks, balconies, carports, or
breezeways that could be enclosed in the future. The customer will not enclose a meter
socket without our prior approval. If approval is given, the customer is responsible for all
costs associated with relocating the meter to an accessible location.
•For service changes and upgrades, the customer’s contractor will coordinate the
disconnection and reconnection of the service with EDTI’s Metering Section. Please call
(780) 412-3810.
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8.4Residential Metering –
Greater Than 200 Amps
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for residential applications. If you are installing a
different electrical service, please see the applicable metering section.
IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•Revenue meters must be located outdoors on the exterior of the house or garage, or in
areas accessible to EDTI.
•The instrument transformer enclosure cannot be located within a residence. It must be
located outdoors in a weatherproof enclosure or for aesthetics, it may be mounted inside
the garage.
•For all transformer-rated services, the meter socket in Drawing 17 must be used. The
socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket
must be CSA-approved.
•The metering equipment must be installed on the load side of the main disconnect.
•Meter socket and instrument enclosures must conform to the sizes noted in Table 11.
See Drawing 17 for the meter and test block enclosure.
•The meter socket and instrument transformer enclosure must be connected by a
32-millimetre (1.25 inch) conduit or raceway and should not include any LBs, if possible.
The conduit or raceway must only contain the wires used for the meter installation. The
total length of conduit from the metering transformer to the meter cannot exceed 7.0
metres. The conduit must enter the enclosure as identified in Drawing 19, using approved
knockouts.
•The instrument transformer enclosure must only contain the metering transformer
installation. The conduit entering the enclosure must not interfere with the installation
of any primary wires, the transformer, or the enclosure cover. The conduits carrying the
main service conductors must also enter the enclosure in a way that won’t interfere with
installing conductors to the metering cabinet.
•Current transformers must be mounted on the inside back wall of the instrument
transformer enclosure and have the polarity marks on the line side, as per Drawing 18.
Mounting must allow for removing the current transformers without needing to remove
the enclosure.
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•Rigid bus and suitable insulators must be used on all services over 600 amps. The bus
must be continuous from the main switch to the current transformers and from the
transformers to sub-switching or splitter bars. Service conductors can be used; however,
a short piece of rigid bus and suitable insulators are to be connected on either side of the
current transformers. This would require a custom metering transformer enclosure. A
drawing of the enclosure must be submitted to EDTI Customer Engineering Services prior
to construction approval.
•All meter sockets and instrument transformer enclosures must be securely mounted
plumb, level, and clear of all objects, and conform to Drawings 18–20. For multi-meter
installation requirements, please see Drawing 16.
•For service changes and upgrades, the customer’s contractor must coordinate the
disconnection and reconnection of the service with EDTI’s Metering Section. Please call
(780) 412-3810.
8.5Network Area Metering –
200 Amps and Less (Socket Style)
The network area extends from 97 to 110 Street and from 97 to 104A Avenue in
downtown Edmonton.
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for network applications. If you are installing a different
electrical service, please see the applicable metering section.
IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•For a single-meter installation where the service required is 120/208-volt, 2-phase,
3-wire, a 5-jaw meter socket (Drawing 16) must be installed on the load side of the main
disconnect on the outside of the building.
•When the service voltage is 347/600 and less than 200 amps, the meter socket must be
installed on the outside of the building on the load side of the main disconnect.
•For single-meter installations where the service voltage is 120/208, the meter socket must
be installed on the load side of the main disconnect on the outside of the building.
•The meter socket for 1-phase services that are 100 amps and larger must be a minimum of
300 millimetres high, 190 millimetres wide, and 100 millimetres deep so that it meets the
minimum bending radius of the aluminum secondary conductors.
•When electrical services are supplied by an underground service conductor larger than
a 1/0 CN, the meter socket must be a minimum of 400 millimetres high, 280 millimetres
wide, and 100 millimetres deep. Smaller meter socket enclosures can only be used for
services of 60 amps or less.
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•In multiple meter installations, each meter must be installed on the load side of its own
lockable disconnecting device, as depicted in Drawing 16. The disconnecting device must
not interrupt service to any other meter. The main disconnect device may be a fused
switch or a breaker suitable for service entry. These meter bases must have the supply
voltage clearly marked (e.g. 600V).
•All electrical equipment must bear the evidence-of-approval marking of certification
organizations that are recognized by the Standards Council of Canada and acceptable to EDTI.
•Round sockets may only be used on services using Number 6 American Wire Gauge (#6
A.W.G.) or smaller wire.
•The meter must be placed in a location that is accessible to EDTI at all times.
•Electrical rooms must be located on ground floors, where practical.
•If an electrical room is located on a floor other than the ground floor, it must be accessible
by a proper stairway as defined in the Alberta Building Code. Please refer to the building
code for “private” or “public” stair types. For example, the maximum rise is 200
millimetres, the minimum run is 210 millimetres, the tread depth is a minimum of 235
millimetres, and the width is 900 millimetres. Access by a ladder is not acceptable.
•Service equipment must be located in a separate room of adequate size, or in a location
that is acceptable to EDTI and the inspection authority. A key to the electrical room must
be provided to the EDTI Meter Reading department. The electrical room cannot contain
mechanical equipment. It must contain electrical and/or communication equipment only.
8.6Network Area Metering –
Greater Than 200 Amps
The network area extends from 97 to 110 Street and from 97 to 104A Avenue in
downtown Edmonton.
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for network applications. If you are installing a different
electrical service, please see the applicable metering section.
IMPORTANT
The customer’s electrical services will be metered at the voltage supplied by EDTI.
•For all transformer-rated services, the meter socket in Drawing 17 must be used. The
socket must be Thomas & Betts Cat. # CT113-SWL, or an approved equivalent with a 10pole test switch and 13-jaw meter socket. The test switch must be pre-wired. The socket
must be CSA-approved.
•Metering equipment must be installed on the load side of the main disconnect.
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•Meter socket and instrument enclosures must conform to the sizes noted in Table 11.
See Drawing 17 for the meter and test block enclosure.
•The meter socket and instrument transformer enclosure must be connected by a
32-millimetre (1.25 inch) conduit or raceway and should not include any LBs, if possible.
The conduit or raceway must contain only those wires used for the meter installation.
The total length of conduit from the metering transformer to the meter cannot exceed
7.0 metres. The conduit must enter the enclosure as identified in Drawing 19, using
approved knockouts.
•The instrument transformer enclosure must only contain the metering transformer
installation. The conduit entering the enclosure must not interfere with the installation
of any conductors, the transformer, or the enclosure cover. The conduits carrying the
main service conductors must also enter the enclosure in a way that won’t interfere with
installing conductors to the metering cabinet.
•When a main feeder and a standby feeder are provided to one site, they must be
separately metered. The metering must be installed on the line side of the customer’s
transfer switch.
•Current transformers must be mounted on the inside back wall of the instrument transformer
enclosure and have the polarity marks on the line side, as per Drawing 20. Mounting must
allow for removing the current transformers without needing to remove the enclosure.
•Potential transformers should be mounted on the bracket supplied. If none are supplied,
they should be mounted on the back, sides, or bottom of the cabinet and should be spaced
to provide ease of wiring (approximately 10 centimetres).
•Rigid bus and suitable insulators must be used on all services over 600 amps. The bus
must be continuous from the main switch to the current transformers and from the
transformers to sub-switching or splitter bars. When service conductors can be used, a
short piece of rigid bus and suitable insulators are to be connected to either side of the
current transformers. This would require a custom metering transformer enclosure. A
drawing of the enclosure must be submitted to EDTI Customer Engineering Services prior
to construction approval.
•All meter sockets and instrument transformer enclosures must be securely mounted
plumb, level, and clear of all objects, and conform to Drawings 18–20. For multi-meter
installation requirements, please see Drawing 18.
•A 14 millimetre (0.5 inch) conduit wired with a single-pair telephone line must be provided
between the 13-jaw meter socket and main telephone panel, with provisions for a
telephone connection.
•In cubicles containing switches or air circuit breakers over 600 amps, the meter socket
must be mounted remote from the switchboard.
•On outdoor transformer-rated freestanding installations, the meter socket must be
mounted on supports remote from the switchgear.
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•Service equipment must be located in a separate room of adequate size, or in a location
that is acceptable to EDTI and the inspection authority. A key to the electrical room must
be provided to the EDTI Meter Reading department. The electrical room must not contain
mechanical equipment. It must contain electrical and/or communication equipment only.
•The meter must be placed in a location that we can access at all times.
•Electrical rooms must be located on ground floors, where practical.
•If an electrical room is located on a floor other than the ground floor, it must be accessible
by a proper stairway as defined in the Alberta Building Code. Please refer to the building
code for “private” or “public” stair types. For example, the maximum rise is 200
millimetres, the minimum run is 210 millimetres, the tread depth is a minimum of 235
millimetres, and the width is 900 millimetres. Access by a ladder is not acceptable.
8.7 Primary Metering
One of the most important parts of your construction is correctly installing the meter so that it
will accurately measure the amount of electricity you use.
The following metering information is for primary electrical applications. If you are installing
a different electrical service, please see the applicable metering section.
IMPORTANT
When a main feeder and a standby feeder are provided to one site, they must be
separately metered. The metering must be installed on the line side of the customer’s
transfer switch.
•Provisions must be made for three-element metering.
•Metering transformers are to be installed on the load side of the circuit breakers and must
be capable of being isolated electrically from both supply and load. On services with an
alternate source, such as an on-site generator or feeder, switches will be installed to allow
isolation of metering equipment.
•Metering transformers must be mounted so they are readily accessible for testing or
changing, with adequate working space provided.
•Space must be provided in the customer’s main metering cell for revenue metering
transformers. Metering current transformers and potential transformers (with fusing) will
be supplied by EDTI and, where feasible, will be installed at the factory when the main
cubicle is being fabricated. Where this isn’t possible, we will make the transformers
available for installation by the customer.
•A grounding bus must be provided adjacent to the metering transformers. Transformer
cases are to be bonded to ground.
•Provision must be made for installing the potential transformers in a drawer-type cabinet
with low- and high-potential opening devices. These drawers must run the full depth of
the cabinet.
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•The potential transformer cabinet must be built with adequate strength to support three
potential transformers and be located at floor level. A door with provision for sealing must
be installed to provide access to the potential transformers. Pin-type contacts are not
acceptable.
•Potential transformer discharge circuits must be a positive make-type with a braid-type wiper.
•Potential transformers’ secondary contacts must be of the open positive make-type,
compliant with Measurement Canada’s bulletin.
•The high-potential conductors of revenue potential transformers must be connected on the
EDTI side of the revenue current transformers.
•At any reasonable time, we have the right to read, inspect, remove, and test metering
equipment installed by the property owner or controlled by the customer. When we
request it, a key for the electrical room must be provided to the EDTI Meter Reading
department.
•The meter socket in Drawing 17 must be used. The socket must be Thomas & Betts Cat.
# CT113-SWL, or an approved equivalent with a 10-pole test switch and 13-jaw meter
socket. The test switch must be pre-wired. The socket must be CSA-approved.
•The meter socket and instrument enclosures must conform to the sizes noted in Table 11. See
Drawing 17 for the meter and test block enclosure.
•The meter socket and instrument transformer enclosure must be connected by a
32-millimetre (1.25 inch) conduit or raceway and should not include any LBs, if possible. The
conduit or raceway must contain only those wires used for the meter installation.
•The length of conduit should be such that the total length of metering wiring from
instrument transformers to the meter socket should not exceed 8.0 metres. The conduit
must enter the meter enclosure as identified in Drawing 19, using approved knockouts.
•All meter sockets must be securely mounted plumb, level, and clear of all objects, and
conform to Drawings 18–20. For multi-meter installation requirements, please see
Drawing 16.
•A 14 millimetre (0.5 inch) conduit wired with a single-pair telephone line must be provided
between the 13-jaw meter socket and main telephone panel, with provisions for a
telephone connection.
•In cubicles containing switches or air circuit breakers, the meter socket must be mounted
remote from the switchboard.
•On outdoor freestanding installations, the meter socket must be mounted on supports
remote from the switchgear.
•Service equipment must be located in a separate room of adequate size. A key to the
electrical room must be provided to the EDTI Meter Reading department. The electrical
room must not contain mechanical equipment. It can only contain electrical and/or
communication equipment.
•The meter must be placed in a location that we can access at all times.
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•Electrical rooms must be located on ground floors, where practical.
•If an electrical room is located on a floor other than the ground floor, it must be accessible
by a proper stairway as defined in the Alberta Building Code. Please refer to the building
code for “private” or “public” stair types. For example, the maximum rise is 200
millimetres, the minimum run is 210 millimetres, the tread depth is a minimum of 235
millimetres, and the width is 900 millimetres. Access by a ladder is not acceptable.
•We have specific servicing details for the Quarters Downtown Development area. If your
development is in this area, which extends from 92 to 97 Street and from 101 to 103A
Avenue, please contact us for these details.
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8.8TABLES
TABLE 11:
Meter Socket and Instrument Enclosures
SERVICE SWITCH
OR BREAKER
Up to 200 A
METER CABINET
SIZE OF CURRENT
TRANSFORMER
ENCLOSURES
METERING
LEAD CONDUIT
Socket
N/A
N/A
201 to 399 A
With current
transformers only
201 to 399 A
With current
transformers
and potential
transformers
750 × 750 × 250 mm
Current and potential
transformer rated
meter socket. Refer
to Drawing 17.
750 × 750 × 250 mm
400 to 600 A
750 × 750 × 250 mm
Over 600 A
Custom cabinet –
see note
35 mm
1.25 inches
7.0 m,
maximum
length
•All enclosure sizes are for 600 volt services or less.
•All dimensions listed are inside dimensions.
•A 14 millimetre (0.5 inch) conduit is required between the meter enclosure and
the main telephone panel.
•EDTI Metering must approve custom-designed cabinets prior to construction.
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8.9DRAWINGS
DRAWING 16:
Multi - Meter Installation
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DRAWING 17:
Meter and Test Block Enclosure Current
Transformer Rated Meter Socket
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DRAWING 18:
3 Phase Instrument Transformers for
Installations Over 200 Amp
(ENCLOSURE LAYOUT DIAGRAM)
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DRAWING 19:
Instrument Transformer Metering Layout
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DRAWING 20:
Instrument Transformer Wiring Diagram
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9.0
9.0
ADDITIONAL
INFORMATION
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9.1
Cable Faults
In accordance with Section 8 of EDTI’s Terms and Conditions, customers or property owners
are responsible for installing and maintaining all electrical service connections located on their
property. This responsibility includes all civil work, such as excavation, trenching, backfilling,
and landscaping, as well as duct or service conduit repair.
SeRVICe CABLe ON PUBLIC AND PRIVATe PROPeRTY
•If the service disruption to the customer’s property was likely caused by a failure of the
service cable (if the cable route is on both public and private property), we will assess the
location of the disruption and provide that information at no cost.
•If the location of the disruption is determined to be on public lands or in a utility right-ofway, we will ensure that repairs are completed as soon as possible at our cost.
•If the location of the disruption is on private property, the property owner will be
responsible for all civil work, as described above. We will complete all electrical
connections and cable repairs (e.g. cable splicing, including short lengths of cable) at no cost
to the property owner, provided that the original installation meets EDTI standards.
•If the faulted cable is in a common trench with high-voltage conductors, we will complete
the necessary civil work and charge the customer for the service. There will be no charge
for cable repairs.
•If it’s evident that the service disruption was caused by third-party damage (e.g., fence
posts, piles, non-standard material, or workmanship), all splicing costs to repair the service
cable will be the customer’s responsibility.
SeCONDARY CABLe WHOLLY ON PRIVATe PROPeRTY
•If the service disruption to the customer’s property was caused by the failure of a lowvoltage cable (secondary cable up to 750 volts) wholly on private property, the property
owner is responsible for locating the disruption and all civil work described above. The
customer may ask us to locate the disruption at their expense or hire a private contractor.
We will complete all electrical connections and cable repairs (including short lengths of
cable) at no cost to the property owner, provided that the original installation meets EDTI’s
standards.
•If the faulted cable is in a common trench with high-voltage conductors, we will complete
the necessary civil work and charge the customer for the service. There will be no charge
for cable repairs.
•If it’s evident that the service disruption was caused by third-party damage (e.g., fence
posts, piles, non-standard material, or workmanship), all splicing costs to repair the service
cable will be the customer’s responsibility.
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PRIMARY CABLe ON PRIVATe PROPeRTY
•If the service disruption to the customer’s property was caused by the failure of a highvoltage cable (primary cable over 750 volts) wholly on private property, we will make
service repairs for safety reasons and to maintain system reliability. This includes locating
the disruption, excavation, cable repair, and rough backfill to grade. EDTI will complete all
electrical connections and cable repairs (including short lengths of cable) at no cost to the
property owner.
•The property owner will be responsible for the costs of locating the disruption and all
civil work described above to repair the cable. It is the property owner’s responsibility to
complete the final restoration at the owner’s own cost.
•Note that final restoration may include, but is not limited to, final compaction of the soil,
landscaping, and restoring concrete or other surfaces, such as patio surfaces, driveways,
and paving stones.
•If it’s evident that the service disruption was caused by third-party damage (e.g. fence
posts, piles, non-standard material, or workmanship), all splicing costs to repair the service
cable will be the customer’s responsibility.
9.2Checklists
These handy checklists will help you plan your new connection. The checklists are for New
Connections and Existing Service Upgrades and the Pre-inspection period.
9.3Co-generation
Note: Co-generation is not allowed for services fed from EDTI’s network system.
MICRO-GeNeRATION
•In Alberta, micro-generation is defined as the generation of electrical energy from a
generating unit that has a total capacity of one megawatt (MW) or less and is connected to
the distribution system.
•Albertans are able to generate their own environmentally friendly electricity and receive
credit for any unused power that goes to the electricity grid. To apply for interconnection
with EDTI, follow the Alberta Utilities Commission’s Micro-generator Application Guideline,
complete the micro-generation application form, and submit it to EDTI.
•If you have questions related to micro-generation, please email us at distgen@epcor.ca.
DISTRIBUTeD GeNeRATION
•Distributed generation usually refers to small-scale electric generators (typically 1 kilowatt
to 50 megawatt) that produce electricity at a site close to the customer.
•If you want to interconnect on-site generating equipment but don’t qualify as a microgenerator, your installation must comply with the Canadian Electrical Code, Part 1, and
EDTI’s Technical Guideline for Interconnection of Generators to the Distribution System.
•If you have questions related to distributed generation, please email us at distgen@epcor.ca.
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9.4Demolition
Before the demolition of any building can begin, it’s important for electricity and other utilities
to be properly disconnected. Electrical services can pose a severe hazard if still active when
the demolition takes place.
If you plan to demolish a building, you must contact your electrical retailer well in advance of
the demolition date. Here are some important points to remember when dealing with different
types of projects:
•
Residential – When you contact your retailer, request Remove Meter and Service for
Demolition.
•Small Commercial – If no EDTI infrastructure, such as padmount transformers, needs to
be removed, request Remove Meter and Service for Demolition when you contact your
retailer.
•
Commercial/Industrial – Request Remove Meter and Service for Demolition when
you contact your retailer. You must also contact us at (780) 412-3128 to arrange for
infrastructure removal, which could include padmount transformers, primary cables, aerial
transformers, poles, and conductors.
Here are some other important things to know before any demolition:
•EDTI will not remove the meter until we receive confirmation that the site has been deenergized.
•Once we receive notification, we will check voltages and remove all current and potential
transformers from the site, along with the meter.
•The customer must not begin demolition until we have provided written confirmation of
de-energization (a guarantee of isolation) and all EDTI assets have been removed.
9.5 Easement Agreement
The following are some examples of situations when we may require an easement to be
registered on your property:
•A switching cubicle installation on your property.
•The necessity to cross properties and facilities that aren’t owned by the customer.
•A lot that is being subdivided.
•A multi-family site.
EDTI will require a blanket easement be registered on title for most multi-family installations.
A blanket easement covers the entire parcel of land.
In most cases, we will prepare the documentation for the customer’s signature.
See Drawing 22 for examples of different easements that may be required.
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9.6Hydro Excavating Procedure (Hydrovac)
Over Primary or Secondary Cables on
Private Property
•Always follow updated EDTI hydro excavating standards (i.e. water temperature, water
pressure limits, and neoprene oscillating head). The hydro excavating operator must be
familiar with this specific standard before starting work to avoid damage to the cable or
exposure to an electrical hazard. A copy of the updated standard must be on-site and
made available to EDTI upon request. Contact EDTI Customer Engineering Services for
updated standards.
•EDTI will allow a contractor to over trench up to 5.0 metres from energized facilities by hand
or hydro excavating. Follow Alberta One-Call procedures and call us before starting work.
•Exposed energized cables cannot be left unattended. If the excavation is narrow or
small, the primary cable must be covered with soil bags or secured with another suitable
temporary method. Contact us for more details.
•Under no circumstances can energized primary cables be moved or handled in any way,
unless under the direct supervision of an EDTI Underground Tradesperson.
9.7Operations
•The customer must provide EDTI with ample notice of any substantial load increases on
their service.
•The customer must supply a 24 hour contact number for a customer representative
qualified to operate the customer circuit breakers. Our personnel will not operate customer
circuit breakers or main disconnects.
•The customer must allow EDTI’s employees, agents, and other representatives access at
all reasonable times to electrical facilities owned by EDTI and located on the customer’s
property. Access is necessary for installing, replacing, repairing, testing, monitoring,
maintaining, inspecting, removing, and any other purpose related to the provision of a
service connection that is deemed necessary by EDTI. The customer must not prevent or
hinder such entry.
•We will try to provide reasonable notice to the customer when we require entry.
•The customer must also notify EDTI when harmonic loads are added to an existing utility
transformer.
•The customer must maintain a minimum power factor of 90 percent on the service.
•The customer will make any required repairs (other than temporary emergency repairs to
restore service that may be made by EDTI) to equipment they own.
•At the customer’s request, EDTI will perform power factor checks and load surveys on our
side of the service connection point.
•EDTI has the right to require the customer to install additional equipment that will reduce or
correct flicker resulting from high-surge equipment connected to the service connection. If
this is the case, we will notify the customer.
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•The electrical service may be subject to voltage fluctuations and other similar issues.
Customers should consider installing voltage regulation and surge protection equipment.
•The customer is responsible for the maintenance of all civil work on private property,
including maintaining the level of equipment. Civil work typically includes trenching,
ducting, transformer or cubicle pads, ground grids, guardrails, pull boxes, and intermediate
service poles.
9.8 Privacy Policy
Our priority is to protect customer information, so we’ve created our Privacy Policy to comply
with the applicable legislation. This policy applies to EDTI Utilities Inc. and all of its subsidiaries.
Some key points in our privacy policy are:
•We treat all customer information as strictly confidential.
•We will never disclose, sell, lease, or trade the information of any customer unless they
authorize us to do so or it is required or permitted by law.
•To efficiently provide customers with our services, we will share information with other
EDTI businesses or suppliers who perform services on our behalf.
See the full Privacy Policy.
9.9 Relocation of EDTI equipment
•Requests to relocate EDTI’s electrical facilities (poles, transformers, switching cubicles,
and pedestals) should be made to EDTI Customer Engineering Services.
•In most cases, the customer is responsible for all costs associated with relocation of
electrical facilities.
•On request, we will provide an estimate of the costs the customer will be required to pay.
•If requested by EDTI, the customer will pay the estimated cost of relocation in advance.
•The customer must also make arrangements for the relocation of all other utilities that may
jointly use electrical facilities, such as telephones and cable television, before relocation.
9.10Splicing Primary and Secondary Cables
on Private Property
•When the customer installs EDTI approved material on private property, we will provide
primary and secondary splicing or cable repair.
•Primary cable splice pits must be 3.0 metres long (parallel to the trench), 2.0 metres wide,
and 150 millimetres deeper than the cable trench.
•For secondary cable repair, the splice pit must measure 1.5 metres long by 1.2 metres
wide. It must be a minimum of 900 millimetres and a maximum of 1,200 millimeters deep,
or as deep as the bottom of the stub-outs, whichever is less.
•
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•The customer is responsible for all landscaping, concrete, paving repairs, and backfilling of
materials after the electrical inspection has passed.
•At the customer’s cost, EDTI will perform temporary emergency repairs to restore service
on customer owned materials and equipment. The customer is responsible for performing
all other repairs.
•When cables are in duct, buried at a depth greater than 1.0 metre, or under concrete walks,
slabs, or driveways, fault location may not be accurate. EDTI takes no responsibility for
inaccurate fault locating due to site conditions.
•We will not splice or repair facilities when the splice or repair would require items that we
do not stock. When cable or equipment failures on the customer’s property are caused
by third-party damage, we will charge the customer the full cost for all repairs, including
splicing. It will be the property owner’s responsibility to collect from any third party. See
the Cable Faults Section (9.1) for more information.
9.11 Temporary Connections
Temporary services are electrical services required by the customer for less than
12 months.
•Examples of temporary services are those for Christmas tree lots and electrical service
requirements during construction. Contact us to see if your service requirements can be
met with a temporary service.
•The 12 month time limit may be extended by written request under special
circumstances only.
•The customer requesting the temporary service connection will be required to pay EDTI for
the cost of any facilities required for the connection, along with the cost of their installation
and removal, less the value of salvaged material. We will provide an estimate for these
services, and all costs must be paid in advance.
•EDTI will provide a temporary connection for emergency purposes, if we believe it is
practical, for a period of 30 days. The customer will be notified to complete the repairs
within that period. At the end of the 30 day period, the temporary connection will be
removed. If the end of the 30 day period occurs between November 15 and April 15,
EDTI will not remove the temporary connection until after April 15 due to winter weather
conditions.
•When small, intermittent electrical loads for construction power are needed, an existing
underground residential service stub, intended for permanent service, can be used for
temporary power. Contact us for the location of the service stub. Note: This type of
temporary arrangement is not suitable for electric heating.
•Customers must contact EDTI for the location of the residential service stub. The customer
is responsible for any additional cable, splicing, trenching, and temporary posts for service
equipment, as well as for backfilling.
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•Special permission before construction approval is required from us for using armoured
or metal-sheathed (TECK) cable for temporary installations. TECK cable is not allowed
for permanent installations. The customer must supply all associated fittings, including
connectors and grounding bushings.
•The service interrupting capacity of temporary service equipment must match the available
fault current of the transformer size and type used, as per Table 3 or Table 9.
•We will not connect any permanent or temporary service to the City of Edmonton’s
streetlight system.
•In aerial distribution areas, aerial temporary services must be mounted on a pole or solid
10.16 centimetre × 15.24 centimetre (4 inch × 6 inch) wood post on the customer’s
property. They should be mounted as close as practical, but no closer than the minimum
design clearances specified in Table 7 of the Alberta Electrical Utility Code. The clearances
allowed in the table may be 3.0 metres to more than 7.0 metres, depending on the
circumstances, primary voltage, in-span swing, and sag of conductors. Installation must
also comply with section 76 of the Canadian Electrical Code, Part I. For more details,
contact us and see Drawing 21.
•When the electricity provided to a URD site is to be used for construction purposes, the
customer will limit electricity consumption at the site to a maximum continuous load of
30 amps.
•When continuous electricity consumption (such as electric heater loads used during
construction) of greater than 30 amps will be required at the URD site, the customer must
notify EDTI and apply for the installation of a temporary service connection that’s capable
of handling the higher load. The customer will pay EDTI the cost of any required facilities
plus the cost of installation and removal of such facilities necessary for the temporary
service connection, less the value of the salvaged material. At our sole discretion, we
may require these costs to be paid in advance, in which case the costs will be based on
estimates prepared by EDTI.
•Should an outage occur on a service connection for a URD site where electricity is being
used for construction purposes and we determine, at our sole discretion, that the outage
was caused by a maximum continuous load of greater than 30 amps at the URD site, then
the customer responsible for the site will be required to pay the URD site construction
overload outage response fee set out in the Fee Schedule. EDTI will only fully re-energize
the service connection if the customer confirms to our satisfaction that the consumption
at the site will be reduced to a maximum continuous consumption of 30 amps. If the
customer fails to do so, or if we are unable to contact the customer through reasonable
efforts, we will only reconnect and re-energize the service connection at 120 volts.
•If two or more outages occur at a URD site where electricity is being used for construction
purposes and we determine, at our sole discretion, that the outages were caused by a
maximum continuous load of greater than 30 amps, we may take other actions in addition
to those discussed above.
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9.12 Tree Trimming
Tree limbs that fall into power lines cause many power outages and are a potential danger for
you and your property. Routine tree trimming and avoiding planting trees under or near power
lines can help prevent this.
For complete information on what needs to be done and who’s responsible for the work,
please see the Request Tree Trimming page.
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9.13TABLES
TABLE 3:
Main Switch or Breaker Minimum
Interrupting Capacity
PRIMARY SERVICES
Interrupting capacities for primary breakers and power fuses are:
• 4.16 KV system: Capacity provided on request.
• 13.8 KV system: Up to 31,000 amps (750 MVA).
• 25 KV system:12,000 amps (500 MVA).
Conventional Secondary Services
For services connected to EDTI’s Downtown Secondary Network, please see Table 9.
INTERRUPTING CAPACITY
MAIN SWITCH OR
BREAKER SIZE (AMPS)
120/240 VOLT
1-PHASE, 3-WIRE
120/208 VOLT
3-PHASE, 4-WIRE
277/480 VOLT
3-PHASE, 4-WIRE
347/600 VOLT
3-PHASE, 4-WIRE
Up to 200 A
10,000
25,000
22,000
14,000
201–600 A
25,000
42,000
30,000
22,000
601–800 A
-
42,000
30,000
22,000
801–1,200 A
-
65,000
50,000
25,000
1,201–2,000 A
-
65,000
50,000
42,000
2,001–3,000 A
-
85,000
60,000
48,000
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values. The minimum interrupting capacity must apply to all components
and to the assembly.
•The interrupting capacities indicated are for one service from one matching
transformer. When a larger transformer is installed to service several temporary or
permanent main panels, the interrupting capacity must match the total capacity of
all main services connected to the transformer. Contact EDTI Customer Engineering
Services to confirm the requirements.
•For temporary services supplied from a permanent transformer, interrupting ratings
must match the available fault currents at the transformer. Confirm the rating with an
EDTI Customer Engineering Services representative.
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TABLE 9:
Main Switch or Breaker Minimum
Interrupting Capacity – Downtown Secondary
Network Services
This service is only provided to selected customers within the network area. EDTI’s Downtown
Secondary Network ranges from 97 to 110 Street and from 97 to 104A Avenue. Contact EDTI’s
Customer Engineering Services for confirmation of whether your service falls within this area.
120/208 VOLTS
347/600 VOLTS
SIZE OF FUSES OR
BREAKERS (AMPS)
INTERRUPTING
CAPACITY (AMPS)
SIZE OF FUSES OR
BREAKERS (AMPS)
INTERRUPTING
CAPACITY (AMPS)
Up to 2,500 A
100,000 A
Up to 1,000 A
100,000 A
2,501–3,000 A
150,000 A
1,001–1,600 A
100,000 A
•All the current ratings specified in this table are root mean squared (RMS)
symmetrical values.
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9.14DRAWINGS
DRAWING 21:
Residential Temporary with Permanent Meter
Socket Support
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DRAWING 22 - PART 1:
Right-of-Way Requirement for Single Phase
Switching Cubicle Single Phase Transformer
or 3 Phase Transformer
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DRAWING 22 - PART 2:
Right-of-Way Requirement for Single Phase
Switching Cubicle Single Phase Transformer or
3 Phase Transformer with 2.0M Gas Right-of-Way
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DRAWING 22 - PART 3:
Right-of-Way Requirement for 3 Phase Switching
Cubicle
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DRAWING 22 - PART 4:
Right-of-Way Requirement for 3 Phase Switching
Cubicle with 2.0M Gas Right-of-Way
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10.0
10.0
DEFINITIONS
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AeRIAL AReA – Parts of a region where electricity is delivered with overhead power lines.
BLAST WALL – A heavy wall used to isolate buildings or areas that contain highly
combustible or explosive materials, or to protect a building or area from blast damage when
exposed to explosions.
CIVIL WORK – The completion, installation, repair, or replacement of ductwork, trenching,
ground disturbance, electrical equipment, guardrails, manholes, vaults, pull boxes, or
landscaping on property owned by the customer.
DeMAND – The maximum rate at which energy is delivered (expressed in kilowatts, kilovolt
amps, or other suitable unit) at a given instant, or averaged over any designated period of time.
DISTRIBUTION TARIFF – A distribution fee or charge prepared by EDTI and approved by the
Alberta Utilities Commission.
eDTI – EDTI Distribution and Transmission Inc., the electrical division of EPCOR.
FLICKeR – Fluctuating electrical loads that lead to a noticeable change in the output of
various devices.
HARMONIC LOAD – A total amount of a portion of the voltage that is a multiple of the
fundamental wave frequency.
HORIZONTAL CLeARANCe – The distance measured horizontally from electrical equipment.
INSTRUMeNT TRANSFORMeR – High-accuracy current or voltage transformers used for
revenue metering.
INTeRRUPTING CAPACITY – The highest current at rated voltage that the device can interrupt.
kV – Kilovolt
kVA – Kilovolt-amp or kilovolt-amps.
kW – Kilowatt or kilowatts.
kWh – Kilowatt hour of kilowatt hours.
LINe SIDe – The side that is located toward EDTI’s system.
LOAD – The demand and energy required to operate equipment.
LOAD CUSTOMeR – A person interconnected to EDTI’s electric distribution system for the
purpose of purchasing electricity for their own use.
LOAD SIDe – The side that is located toward the customer’s equipment.
MCM – One thousand circular mils.
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MANHOLe – A covered opening, generally on a street, that provides access for maintenance
or repairs to underground electrical systems.
METER SOCKET – A meter-mounting device for installing a self-contained meter.
MINNeSOTA MOUNDS – An above-ground mound of dirt used for septic systems.
PADMOUNT TRANSFORMeR – A ground-level transformer that sits on a concrete base.
PeDESTAL – A grade-mounted utility box that houses connections and switches for
electrical connections.
POINT OF SeRVICe – The electrical connection point at which EDTI’s service conductors are
connected to the conductors or apparatus of a customer.
POLe-MOUNTeD TRANSFORMeR – A transformer mounted on a utility pole.
POWeR FACTOR – The efficiency of an electrical circuit to deliver usable power.
PRIMARY CONDUCTOR – A high-voltage utility conductor in excess of 750 volts.
PRIMARY DUCT – A conduit in which high-voltage conductors are installed.
PRIMARY FAULT – A short circuit in the high-voltage distribution system.
PULL BOX – An intermediate enclosure in a conduit system to aid in the installation of
circuit conductors.
ReTAILeR – A company that sells or provides retail electricity services directly to customers.
SeCONDARY CONDUCTOR – A low-voltage wire or combination of wires that carries an
electrical current at 750 volts or less.
SeCONDARY DUCT – A conduit in which low-voltage conductors are installed.
SeCONDARY FAULT – A short circuit in the secondary system.
SeLF-CONTAINeD MeTeR – A meter rated for carrying the total current and voltage of
the circuit.
SeRVICe CONNeCTION – The point at which the customer’s electrical distribution system
connects to the utility electrical distribution system.
SeRVICe CONNeCTION POINT – The point at which the customer’s facilities physically
connect to EDTI’s distribution system to permit the customer to obtain electricity. For an
underground service, this could also be described as the specific point that EDTI’s civil work
ends and the customer’s begins.
SeTBACK DISTANCe – The minimum allowable distance to the point where new equipment
or other devices can be installed.
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SWITCHGeAR – The combination of electrical disconnect switches, fuses, or circuit breakers
used to control, protect, and isolate electrical equipment.
SWITCHING CUBICLe – A metallic box that typically sits on the ground and holds a number of
electrical switches and devices.
TRANSFORMeR – An electromagnetic device used to change the voltage in an alternating
current electrical circuit.
TReNCHING – A narrow, long ditch embanked with its own soil.
VAULT – An underground room or contained area that houses electrical equipment.
WeATHeRHeAD – The entry point where open conductors enter a conduit system.
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