Customer Metering and Services Guide
This document is an uncontrolled copy and may not be the most current copy. The most
current copy is available at www.atcoelectric.com. This document is the property of
ATCO Electric and may be updated at any time.
Customer Metering and Services Guide
About this Guide
The intent of this guide is to provide direction and guidance for customers, consultants
and electrical contractors either requiring or installing an electrical service that will be
energized by ATCO Electric. This guide provides specifications for metering
configurations for most services under 750 volts.
The metering and service specifications outlined in this publication must also comply
with all applicable requirements of Part 1 of the current Canadian Electrical Code, the
Alberta Safety Codes Act and ATCO Electric's "Terms & Conditions”. All metering and
service installations must meet these requirements. Where the design, application,
location or construction of the installation does not conform to these requirements or
violates any other related act or code regulations, ATCO Electric will not install metering
or energize a service.
Additional copies of this publication are available on the ATCO Electric internet site at
www.atcoelectric.com.
Installations NOT covered by this Guide
Special arrangements can be made for installing service connections not specified in
this guide, with approval prior to installation. Consult the local ATCO Electric customer
service representative for more information.
Revised Dec-09
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Customer Metering and Services Guide
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Customer Metering and Services Guide
Table of Contents
List of Drawings and Tables
5
Glossary
7
GENERAL INFORMATION
9
APPLICATION FOR SERVICE AND GENERAL REQUIREMENTS
13
Non-Standard Services
16
RESIDENTIAL SERVICES
17
Single Phase Residential Services − Self-Contained Metering
18
Single Phase Residential Services − Instrument Transformer Metering
29
Multiple Customer Metering
30
FARM SERVICES
35
Single Phase Farm Services − Self-Contained Metering
36
Single Phase Farm Services − Instrument Transformer Metering
41
Three Phase Farm Services − Self-Contained Metering
43
Three Phase Farm Services − Instrument Transformer Metering
44
COMMERCIAL SERVICES
47
Single Phase Commercial Services − Self-Contained Metering
48
Single Phase Commercial Services − Instrument Transformer Metering
50
Three Phase Commercial Services − Self-Contained Metering
53
Three Phase Commercial Services − Instrument Transformer Metering
54
INDUSTRIAL SERVICES
57
Single Phase Industrial Services − Self-Contained Metering
58
Single Phase Industrial Services − Instrument Transformer Metering
60
Three Phase Industrial Services − Self-Contained Metering
63
Three Phase Industrial Services − Instrument Transformer Metering
64
MICRO−GENERATION
71
TEMPORARY SERVICES & IDLE SERVICES
73
INSTRUMENT TRANSFORMERS
75
MANUFACTURED SWITCHGEAR FOR SERVICES & METERING
87
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Customer Metering and Services Guide
Appendix
89
Diagrams of Socket Connections
89
Diagram of Socket Connections − continued
90
Wiring Diagram for Grounding Resistors
91
Design Clearances on Underground Distribution
93
Sizing of Building Alcove for Locating a Padmounted Transformer
94
Typical Alignment on Front Street Monolithic Curb/Sidewalk
95
Typical Alignment on Front Street Boulevard / Rear Traffic Lane
96
Typical Alignment on Rear Lot Utility Lane / Rear Easement Access
97
Landscaping Adjacent to Underground Electrical Equipment
98
Landscaping Adjacent to Padmount Transformer and Pedestal
99
Landscaping Adjacent to Padmount Switch Cable and Street Light
100
Protective Guard Posts for Padmounted Transformer or Switching Cubicles
(Open Areas)
101
Protective Guard Posts for Padmounted Transformer Located in Alcoves
102
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Customer Metering and Services Guide
List of Drawings and Tables
Standard Overhead Distribution Voltages
10
Standard Underground Distribution Voltages
10
Recommended Voltage Variation Limits
11
Underground Residential Pedestal, Service and Cable Stubbing Arrangement
22
Multiple Services in a Multiple Dwelling
23
Optional Townhouse Multi−Meter Detail
24
Multi-Port Connection Terminals for AMR
25
Acreage Customer Owned Secondary - Mounted on a Pole
28
Typical Arrangement for Multiple Customer Metering
32
Quadlogic “miniCloset” Metering Equipment
33
Farm Type Metering
38
Padmount Transformer and Underground Service on a Farm
39
Installation of Multi-Breaker Box for Farm Type Metering of 2 Services
40
ATCO Electric Standard for Self-contained Metering of 100 or 200 amp on
An Oilfield Service Pole
66
Pole Metering for Oilfield Loads Over 200 Amps
67
Customer Owned Metering in a Building, for Oilfield Loads Over 200 Amps 68
Secondary Overhead to Underground Riser on a Pole
69
Meter Requiring Instrument Transformers
76
Typical Connections for 3 Phase 4 Wire Wye Services
77
Meter and Test Switch Enclosures
78
Single Phase, 3W 120/240 Volt Instrument Metering
79
3 Phase, 4W 120/208Y Volt Instrument Metering
80
3 Phase, 4W 277/480Y or 347/600Y V Instrument Metering
81
Bolting Instrument Transformer
82
3 Phase, 4W 347/600Y V Instrument Metering – AMR Equipped
83
2 Wire Current Transformer 600V Class
84
Window Type Current Transformer 600V Class
85
Voltage Transformer 600V Class
86
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Customer Metering and Services Guide
Diagrams of Socket Connections
89
Diagrams of Socket Connections cont’d
90
Wiring Diagram for Grounding Resisters
91
Design Clearances on Underground Distribution
93
Sizing of Building Alcove for Locating a Padmounted Transformer
94
Typical Alignment on Front Street Monolithic Curb / Sidewalk
95
Typical Alignment on Front Street Boulevard
96
Typical Alignment on Rear Lot Utility Lane
97
Landscaping Adjacent to Underground Electrical Equipment
98
Landscaping Adjacent to Padmount Transformer and Pedestal
99
Landscaping Adjacent to Padmount Switch Cubicle or Street Light
100
Protective Guard Posts for Padmounted Transformer or Switching Cubicles
(Open Areas)
Protective Guard Posts for Padmounted Transformer Located in Alcoves
101
102
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Customer Metering and Services Guide
Glossary
AMR − Automatic Metering Reading
AMI – Advanced Metering Infrastructure refers to a system that measures, collects and
analyses energy usage, from advanced devices such as electricity meters, gas meters
and / or water meters, through various communication media on request or on a
predefined schedule. This infrastructure includes hardware, software, communications;
Customer associated systems and meter data management software.
CEC − Canadian Electrical Code, Part 1 and Amendments
CMT – Commercial Metering Transponder for AMR
CSA − Canadian Standards Association
CT – Current Transformer
AECUC − Alberta Electrical and Communications Utility Code
Demand − The average value of power over a specified interval of time. The most
common quantities are kilowatt (kW) and kilovolt amperes (kVA) demand.
Energy − The integral of active power with respect to time. E.g. kilowatt-hours (kWh)
Ground – The conductor that only carries current under a fault condition, not to be used
as Neutral.
Harmonics − Are distortions to the voltage and current waveforms from their normal
sinusoidal shape.
IMT − Integrated Metering Transponder for AMR
Instrument Transformer Metering − Using a transformer in a metering circuit to step
down the current and/or the voltage to a level that can be accommodated safely by the
meter.
Interval Data Metering − Revenue meters that have mass memory data storage
capability.
Measurement Canada − Oversees the sealing and verification of electric meters used
for revenue consumption.
Meter Base – typically a socket style device for the connection to a self-contained
meter.
Metering Services Provider – Owns and maintains the revenue meters on the
distribution system.
Meter Socket and Test Switch Enclosure – meter socket with a pre-wired metering
test switch for use with current and/or voltage transformers enclosed in a metal housing.
MIT – Meter Interface Transponder for AMR
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Customer Metering and Services Guide
Multiple Customer Metering – Multiple residential metering where the building does
not use standard individual meters for each suite. The metering uses “mini” CT’s on
each branch circuit.
Multiple Service − A service to a building such as an apartment building or shopping
centre that has two or more units and a common service entrance in which each unit is
served and metered separately.
Network – Two phase wires and the Neutral from a three phase four wire wye system
that form a three wire service for residential type loads.
Neutral – The conductor from the transformer Star point that carries the imbalanced
load current and provides a reference point for the metering potentials, the “grounded”
conductor.
Non-Farm – A service where the Customer in not engaged in a farming application.
Non− REA – A service where the Customer does not belong to a Rural Electrification
Association.
R.E.A.L − Rural Electrification Association Limited (REA)
Retailer − Markets electrical energy or electrical services to consumers.
Rural Service – A service in a rural area where the Customer does not farm or belong
to a REA.
Self-Contained Meter − A meter designed to accommodate the full line current and
Voltage of the circuit.
SCA − Alberta Safety Codes Act
Settlement System Code − Agreement between retailers, wire service providers,
transmission service providers, the independent system operator meeting the
requirements of the Alberta Electric Utilities Act.
VT – Voltage Transformer
The Company − ATCO Electric.
Wire Service Provider − Owns and operates the electric distribution system.
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Customer Metering and Services Guide
GENERAL INFORMATION
Types of Metering
The type of metering specified by the Company shall depend on the class of service,
size of load to be served and the applicable rate, for e.g.: energy, kW or kVA demand.
The Company shall install, maintain and own all meters, except for meters on R.E.A.L.
member services, where they are owned by the R.E.A.L. Independent Power Producers
may also own their own meter but it must conform to the Measurement System
Standard for the province of Alberta.
All meters must be sealed, maintained and tested according to Measurement Canada
standards.
Self-Contained Metering
Used for metering loads up to and including 600 volts where the main breaker does not
exceed 200 amps. (single phase to 480 and three phase to 600 volts)
Instrument Metering
Used for metering loads where the main breaker is greater than 200 amperes and/or
over 600 volts. On loads over 500 kW, interval data meters are required.
Optional Customer Pulse − Upon request a pulse output meter or devices such as
transducers and pulse duplicating relays may be installed in the Customers metering
circuit. The Customer will discuss data acquisition needs with the Company early in
the project planning stages. The Company installs the optional pulse devices and
the Customer will be billed for costs above the Company's standard installations.
Customer Choice Metering – Upon request, an interval data meter can be installed
on a Customer installation that is <500 kW. The Customer will request the meter be
installed and will be billed for the costs above the Company’s standard installation
and for a monthly fee to collect the interval data.
Standard Three Phase Metering Configuration
All new three phase services are to be four wire wye (Star) systems, metered three
element with the Neutral (grounded conductor) forming part of the metering circuit. The
Neutral conductor must be connected between the transformer or point of supply and
the metering point of all three phase, four wire, wye systems. The Neutral must be
grounded at the main service disconnect. The use of an isolated Neutral block is
necessary when the metering point is on the load side of the main service disconnect.
Primary Metering
Primary metering is available for multi−voltages or services normally over 1000 kVA.
Unmetered Services
The Company does not allow unmetered services. All services must be metered with
Measurement Canada approved revenue meters to comply with the Alberta Settlement
System Code requirements.
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Customer Metering and Services Guide
Standard Supply Voltages
The following tables show the Company's standard overhead and underground voltage,
phase and load configurations. Not all standard voltages are available at all locations:
Service Voltage
120/240
Table 1
Standard Overhead Distribution System
Transformer Load
Full Load Range Line
Phase / Wire
Range
Amperes
10 to 167 kVA
@120
@240
Single Phase, 3 Wire
(may be larger for
83 to 1391 41 to 696
Special loads)
Amps
Amps
120/208Y
Three Phase, 4 Wire
30 to 300 kVA
83 to 833 Amps
277/480Y
Three Phase, 4 Wire
15 to 3000 kVA
18 to 3610 Amps
347/600Y
Three Phase, 4 Wire
150 to 3000 kVA
144 to 2887 Amps
Service Voltage
120/240
Table 2
Standard Underground Distribution System
Transformer Load
Full Load Range Line
Phase / Wire
Range
Amperes
@120
@120
Single Phase, 3 Wire
10 to 100 kVA
83 to 833 41 to 416
Amps
Amps
120/208Y
Three Phase, 4 Wire
75 to 500 kVA
208 to 1388 Amps
277/480Y
Three Phase, 4 Wire
30 to 4000 kVA
36 to 4813 Amps
347/600Y
Three Phase, 4 Wire
Minimum 150 kVA
144 Amps and Up
Other Voltages
Service may be provided at any required voltage, under mutually, satisfactory agreed
terms. Requests for non-standard voltage supply must be approved by the Company.
Voltage Operating Conditions
All services are alternating current 60 hertz. The normal system voltage and voltage
limits at the service entrance are as specified in the Canadian Electrical Association
Reference Standard for Canadian Practice "Preferred Voltage Levels for AC Systems
0 − 50,000 volts" and CSA Standard CAN 3−C235−83, Table 3.
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Customer Metering and Services Guide
For circuits up to 1,000 volts the recommended voltage variation limits at the service
entrance:
Table 3
Extreme Operating Conditions
Nominal
Voltage
Normal Operating
Conditions
Single Phase
120/240
240
480
600
106/212
212
424
530
110/220
220
440
550
125/250
250
500
625
127/254
254
508
635
Three Phase
4 Conductor
120/208Y
240/416Y
277/480Y
347/600Y
110/190
220/380
245/424
306/530
112/194
224/388
254/440
318/550
125/216
250/432
288/500
360/625
127/220
254/440
293/508
367/635
Three Phase
3 Conductor
240
480
600
212
424
530
220
440
550
250
500
625
254
508
635
For supply circuits of 1,000 − 50,000 volts the recommended voltage variation to the
Customer is:
1. The voltage rise does not exceed six percent above normal (7.2V on 120V base).
2. The voltage drop on sub transmission does not exceed six percent below normal
(7.2V on 120V base) or on distribution does not exceed eight percent below normal
(9.6V on 120V base).
3.
The voltage variation from maximum to minimum on load cycle periods does not
exceed nine percent (10.8V on 120V base).
Ownership of Facilities
The Company or the R.E.A.L retains full title on all equipment, lines and apparatus
which it provides in extending service and metering the electricity supply. Instrument
transformers provided by the Company and installed by a Customer remain the property
of the Company.
"Terms & Conditions” and Rate Schedules
Information on the ATCO Electric's "Terms & Conditions” and Rate Schedules are
available at any ATCO Electric office or at www.atcoelectric.com.
Revised Dec-09
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Customer Metering and Services Guide
Minimum Permissible Secondary Service Clearances Specification
Note: Lowest conductor shall not be less than 4.0 m above finished grade.
Dimensions in metres
D-SC28 May 2009
Revised Dec-09
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Customer Metering and Services Guide
APPLICATION FOR SERVICE AND GENERAL REQUIREMENTS
The Customer should apply for service early in the planning stage of a project in order
for the Company to meet the Customer's needs, determine the best service
arrangement and to provide the time to obtain necessary equipment.
Contact the local Customer Service Representative or see application requirements on
www.atcoelectric.com.
The Customer shall provide the Company with all the necessary information regarding
the type of service, connected loads, timing, service voltage and a site plan. A service
agreement may be required with the Company's "Terms & Conditions” and the rate
schedule applicable to the service. A Customer contribution may be required.
Service Voltage and Location
The service voltage is the voltage and phase(s) requested by the Customer. Each
service will be at one of the standard voltages listed in this guide and will be metered
appropriately. Requests for voltage supply must be approved by the Company. The
service location on the Customer's premises is subject to approval of the Company.
Service Entrance Drawings
To ensure the Customer does not experience any delays on a service entrance over
200 amperes, three sets of drawings of the service entrance, service location and
service, and metering layout shall be submitted to a Company Customer service or
marketing representative. The drawings shall be stamped final and initialed by the
issuing consultant or electrical contractor. All installations shall comply with the
applicable requirements of the Canadian Electrical Code and Alberta Safety Codes Act
regulations.
Access
The Company has the right, and will endeavor to make reasonable arrangements, to
enter the Customer's property or premises to install, inspect, read, change, maintain
and remove its facilities.
For Company facilities located within locked Customer premises the Customer shall
provide a means of access.
In subdivisions, the developer shall provide easement at no cost to the Company where
required for access, and for providing service extensions to each parcel of property.
Meter Locations
All metering and service locations shall be approved by the Company prior to
installation. Meters shall be located either on the line side where the voltage is less
than 300V line to line or load side of the Customer's main breaker (disconnect) where
the voltage is greater than 300V line to line as detailed in the Canadian Electrical Code.
Company personnel must have reasonable access to the meter to perform meter
changes, testing and meter reads.
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Customer Metering and Services Guide
The Company will not install meters in alleyways or areas where the meter is
unprotected from moving equipment, in the path of water from eaves or rain spouts or
where the meter may be subject to steam, corrosive hazardous vapors.
The Company will not install meters in areas that are difficult to access areas such as;
•
Inside all biologically hazardous areas, poultry / pork or any other livestock
facilities where the spread of disease or virus is possible. This includes directly
under any vents or fans that move air to or from the building.
•
No meters shall be mounted in a known H2S environment. The meter must be
installed outside of this zone.
•
open pits,
•
near moving machinery,
•
hatchways,
•
closets or stairways
•
where there are noticeable vibrations.
Splitter Box Location
A splitter box must not be installed ahead of the meter or service disconnect. The
instrument transformer enclosure can not be used as a splitter box.
Wiring Permit
A copy of a signed electrical wiring permit shall be presented to the Company before the
electrical service is connected on a new, altered or relocated service.
Retailer
The Customer must have a retailer before a service can be energized. A retailer or any
other person acting as an agent of a Customer may apply for a service connection on
behalf of the Customer. The Retailer or agent must provide the Company, in a form
acceptable to the Company, verifiable authorization from the Customer to make the
application.
Relocations
Where a building extension encloses or interferes with existing metering, the Company
will relocate the service at the Customer's expense. There is no charge if the overhead
service conductors and the meter only are relocated.
The Company will, at the request of a Customer, relocate the facilities installed to
service the Customer, provided the Customer pays all costs of such relocation. There
will be no charge to relocate only the meter and overhead service conductors.
Revised Dec-09
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Customer Metering and Services Guide
Modifications
Customers shall obtain written approval from the Company before modifying an existing
service which may affect the metering. The Customer may be charged for costs
associated with any change required to the Company's facilities due to the service
modification.
Customer Grounding Resistor
Refer to page 91, Wiring Diagram for Grounding Resistors.
Load Changes
A Customer shall advise the Company in writing of any changes to their load
requirements so that the Company may determine if service changes are required to
accommodate the increased load. The Customer shall provide sufficient time for the
Company to obtain equipment and make the necessary changes. If a Customer has not
obtained permission from the Company the Customer can be held responsible for any
damage to the Company's property or equipment resulting from a major change in a
load.
Harmonic Loading Additions
The Customer shall notify the Company when harmonic loads such as VFD (variable
frequency drive) motors are added to an existing utility transformer. If the calculated
harmonic current is in excess of 5% of the utility transformer rated current as stated in
IEEE C57.12.00 -− 1987, the transformer may have to be changed. The Customer shall
be responsible for any incremental costs associated with the transformer change.
Harmonic Distortion
All Customers with loads producing harmonic distortion shall comply with the "ATCO
Electric Transmission and Distribution System Guide to Nonlinear Load Additions". This
document follows The Institute of Electrical and Electronics Engineers 519−1992 "IEEE
Recommended Practices and Requirements for Harmonic Control in Electric Power
Systems" with some ATCO Electric modifications which take precedence over IEEE
519−1992. This guide outlines the procedures, information and technical requirements
to be observed from the initial design stages to the energizing of the harmonic
producing load installation. Contact your local Company representative for a copy of
this document.
For detailed information on Harmonics and New Loads please refer to the ATCO
Electric webpage www.atcoelectric.com. Go to Forms and Publications, “Distribution
System Standard for the Installation of New Load”.
Three Phase Loads
The Customer is responsible for single phase protection on three phase loads.
Electronic Loads
The Customer is responsible for protecting all sensitive electronic loads against
transients caused by such events as lightning or utility switching.
Revised Dec-09
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Customer Metering and Services Guide
Non-Standard Services
Service and metering requirements not covered in the guide are to be discussed with
the local Company representative. The Customer shall submit three sets of drawings of
the service entrance, service location and service and metering layout to a Company
Customer service representative. The drawings shall be stamped final and initialed by
the issuing consultant or electrical contractor. All installations shall comply with the
applicable requirements of the CEC and SCA regulations. The Company will make
every effort to meet the Customer's needs.
Power Factor
A Customer shall design, install and operate the Customer's facilities in such a manner
as to maintain a Power Factor of not less than 90%. The Company may require any
Customer not satisfying this Power Factor requirement to furnish, install, and maintain,
at no cost to the Company, such corrective equipment as the Company may deem
necessary under the circumstances.
Revised Dec-09
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Customer Metering and Services Guide
RESIDENTIAL SERVICES
Residential services are generally self-contained metering services to an urban or rural
house or dwelling.
Note: REA and Farm residences are not covered by this section. See “Farm Services”
for those applications.
General Requirements
♦ Metering shall be located on the line side of the Customer's main breaker.
♦ Metering shall be located on the outside wall of the house except for rural residential
services which may utilize pole metering. The Company will advise the Customer if
pole metering is to be used.
♦ Where recessed metering is installed in a wall, a clear space of not less than 0.2
metres on either side of the centre line of the meter base and 1.0 metre in front of
the meter is required, to provide the Company access to the meters.
♦ The centre line of the meter socket shall be 1.5 to 1.8 metres above the finished
grade or permanent platform.
♦ The meter socket must not have a self shorting device.
Revised Dec-09
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Customer Metering and Services Guide
Single Phase Residential Services − Metering
Single phase metering is used for residential services where the main breaker rating
does not exceed 200 amperes. Metering shall be located on the line side of the
Customer's main breaker.
General Requirements
♦ For all single phase services, a 4−jaw meter socket shall be used. See page 89,
Diagram of Socket Connections.
♦ The meter socket must not have a self shorting device.
♦ AMR meters may measure up to 216mm (8½") in depth; therefore, sufficient
clearance must be taken into consideration when installing the AMR meter on a wall
or in a cabinet or enclosure.
♦ For AMR water meter hook up, the water meter wire hole shall be positioned directly
below the meter base and as close to the left hand side of the conduit as possible
without interfering with main service panel. Refer to page 25, Multi-port Connection
Terminals for AMR.
Overhead Urban Residential Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install conduit, weatherhead, rack and conductor in the mast on the
line side of the main breaker.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to the weatherhead
including:
•
Conductors and connectors from pole to mast.
•
The meter.
Revised Dec-09
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Customer Metering and Services Guide
Underground Urban Residential Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install the conduit for the Company's conductors to the meter socket
on the line side. Refer to drawing on page 22, Underground Residential
Pedestal, Service and Cable Stubbing Arrangement.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
•
Supply under ground secondary service conductors for services greater than
100 Amps.
The Company shall:
•
Supply and install all facilities required for electrical service up to the meter base
for services up to 100 Amps including:
•
Conductors and connectors from service pedestal or transformer within 3.0 m
of the nearest corner of the house.
•
Supply and install the meter.
Overhead to Underground Urban Residential Service
When a Customer requests an underground service from an overhead supply the
Customer shall be responsible for all additional costs incurred by the Company.
Revised Dec-09
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Customer Metering and Services Guide
Urban Multiple Residential Dwelling – Metering
Single phase urban multiple residential dwellings include apartment buildings, duplexes
or fourplexes where there are two or more meters, a main breaker and splitter box on
the line side of the meters.
General Requirements
♦ All metering shall be located inside of the building in the same room. Fourplexes,
like duplexes, which have no main breaker ahead of the meters, must have the
splitter and meters located together on the outside of the building using outdoor type
weatherproof switchgear. Refer to page 23, Multiple Services in a Multiple Dwelling.
♦ For all single phase services, a 4−jaw meter socket shall be used. See page 89,
Diagram of Socket Connections.
♦ The meter socket must not have a self shorting device.
♦ For all network services, a 5−jaw meter socket shall be used.
♦ See page 89, Diagram of Socket Connections.
♦ Each individual unit within a multiple dwelling will be served as a separate Point of
Service, unless the Company agrees otherwise.
See page 30, Multiple Customer Metering for complexes that are not selfcontained.
Single Phase Urban Residential Multiple Dwelling Services from an Overhead
Transformer
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install conduit, weatherhead, rack and conductor in the mast on the
line side of the main breaker.
•
Supply and install the main breaker, conductor and splitter box.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to the weatherhead
including:
•
Conductors and connectors from pole to mast.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Urban Residential Multiple Dwelling − Underground Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install the conduit and conductors from the service pedestal to the
main breaker. Refer to drawing on page 22, Underground Residential Pedestal,
Service and Cable Stubbing Arrangement.
•
Supply and install the main breaker, conductor and splitter box.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
Supply under ground secondary service conductors for services greater than 100
Amps.
The Company shall:
•
Supply and install all facilities required for electrical service up to the meter base
for services up to 100 Amps including:
•
Conductors and connectors from service pedestal or transformer to the
building.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Underground Residential Pedestal, Service and Cable Stubbing Arrangement
Dimensions in mm
X301 May 2009
Notes on Cable Stubbing:
1.
Extend cable end a minimum of 300 mm above highest cable in trench.
2.
Seal cable end with S.A.P. tape and cover with all weather tape.
3.
Attach location tape to cable end and extend location tape to surface.
4.
Refer to H9 for all tagging, signage & cable marking
5.
Random separation Telephone/Cable TV/Power.
Revised Dec-09
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Customer Metering and Services Guide
Multiple Services in a Multiple Dwelling
Revised Dec-09
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Customer Metering and Services Guide
Optional Townhouse Multi−Meter Detail
The drawing below indicates an optional connection configuration for an installation
where there are multiple residential meters fed from one source such as a townhouse
complex.
Notes:
1. Meter sockets can be attached on either side or top of the junction box provided it meets the
supply authority requirements.
2. A locking mechanism for a padlock is required on the junction box. ATCO Electric will supply
the padlock.
3. The Customer is responsible for the supply and installation of:
a. Junction box − 760 X 760 x 250 mm − weatherproof.
b. Termination blocks sized to 300MCM AL.
c. Meter sockets − minimum 100 Amps.
d. All conduit c/w expansion joint.
e. All secondary connections from the termination blocks to the meter sockets.
4. ATCO Electric is responsible for;
a. Supply and installation of meters.
b. Supply, installation and connection of the source cable to the junction box.
Revised Dec-09
- 24 -
Customer Metering and Services Guide
Multi-Port Connection Terminals for Automatic Meter Reading Residential Meters
Connect a Water and/or Gas meter communications link to the AMR energy meter.
Notes:
1. The Multi-port access cover must be sealed at all times.
2. The AMR water meter wire hole should be positioned as close as possible to the bottom left
of the conduit (see diagram) without interfering with the main service panel.
3. The auxiliary metering wire that connects to the multi-port terminals must be ty-rapped to the
meter socket conduit so that it can not be accidentally “pulled” from the Field Wiring Terminal
block.
Revised Dec-09
- 25 -
Customer Metering and Services Guide
Overhead Rural Residential Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install conduit, weatherhead, rack and conductor in the mast on the
line side of the main breaker for a service on a building.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to the weatherhead
including:
•
Conductors and connectors from pole to the mast.
•
Supply and install the meter.
Revised Dec-09
- 26 -
Customer Metering and Services Guide
Underground Rural Residential Service
General Requirements
♦ Refer to page 39, Padmount Transformer and Underground Service on a Farm.
♦ The meter socket must not have self shorting devices.
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install the conduit for the Company's conductors to the meter socket
on the line side. Refer to drawing on page 22, Underground Residential
Pedestal, Service and Cable Stubbing Arrangement
•
Supply under ground secondary service conductors for services greater than
100 Amps.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to the meter base
for services up to 100 Amps including:
•
Conductors and connectors from service pedestal or transformer to the
building.
•
Supply and install the meter.
Overhead to Underground Rural Residential Service
When a Customer requests an underground service from an overhead supply, the
Customer shall be responsible for all costs incurred by the Company.
Revised Dec-09
- 27 -
Customer Metering and Services Guide
Acreage Customer Owned Secondary - Metering Mounted on a Pole
Dimensions in mm
X391 May 2009
Notes:
1.
Customer to contact ATCO Electric when Customer secondary connection is ready.
2.
Meter socket shall be grounded internally.
Revised Dec-09
- 28 -
Customer Metering and Services Guide
Single Phase Residential Services − Instrument Transformer Metering
Single phase instrument transformer metering is used for residential services where the
main breaker rating exceeds 200 amperes. Metering shall be located on the load side
of the Customer's main breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ The meter shall be located on the inside of a building in the same room as the
instrument transformer enclosure, separated by a maximum of 6.5 metres. If the
meter cannot be accommodated inside the building, it may be located outside using
a Microlectric FA4B-6T, 6 jaw meter socket & test switch enclosure that houses 2 –
2 wire current transformers.
♦ For all single phase instrument services, a 6−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures –
Diagram (1).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS for additional information.
Overhead Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install the conduit, weatherhead, rack and conductors in the mast for
metering located on or in a building.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation and primary connection to the current
transformer (lugs).
The Company shall:
•
Supply and install the primary facilities required for electrical service.
•
Supply secondary service conductors.
•
Supply the current transformers.
•
Supply and install the meter.
Revised Dec-09
- 29 -
Customer Metering and Services Guide
Multiple Customer Metering
Multiple Customer Metering is used in apartment and condominium buildings where the
developer decides not to use the traditional “meter room” that houses all the “suite” and
“house” meters for the building.
It consists of a main meter head and junction box connected to “mini” window type
current transformers on the branch circuits to the suites.
General Requirements
♦ The supply authority approved; multiple Customer metering is the “miniCloset”
supplied by Quadlogic Meters Canada Inc.
♦ Consult Metering Services to ensure the metering transponder, meter head, current
transformer shorting block and current transformers are mounted in the correct
location.
♦ All wiring and installation requirements must conform to the Canadian Electrical
Code.
♦ Refer to the drawing on page 32, “Typical Arrangement for Multiple Customer
Metering” for additional information.
♦ The Customer shall supply the utility engineering department with 3 sets of drawings
for the installation of the project. These drawings are to include the electrical
connection schematics for the current transformers and all associated panels.
♦ Maintain 1.0 metre clearance on each side of the cabinets for access.
Revised Dec-09
- 30 -
Customer Metering and Services Guide
The Customer shall:
•
Complete all installation of equipment including wiring termination; ensure all wire
is in conduit.
•
Install current transformers (CT’s) on branch feeders; wire CT’s to the CT shorting
block.
•
Install CT shorting block cabinet; wire CT shorting block to meter head cabinet.
•
Ensure the CT shorting block cabinet and meter head cabinet are connected via
minimum 2” conduit.
•
Install meter head cabinet 1.5 to 1.8 metres above finished floor; install power
circuit for meter head.
•
Connect the meter head cabinet to the power panel by ¾” conduit.
•
Connect the metering transponder to the power panel with the required power
source.
•
Install a dedicated telephone line (meter use only) from the telephone Company
service panel to the RJ−11 termination at the metering transponder.
•
Ensure a lockable disconnect for disconnecting the power to the apartment or
suite. This is required for the Customer to turn off the unit when vacant or for the
utility to turn off as required.
•
Ensure that all “house” connected loads are not connected to the “mini” window
type current transformer metering circuit supply. All house loads must be
connected through the “house” metering supply.
The Company shall:
•
Procure the meter head, current transformer (CT) shorting block, current
transformers (CT’s) and telephone line termination blocks (RJ−11).
•
Program, verify and seal the meter head.
•
Verify the wiring connections from the CT’s to the CT shorting block & to the
meter head.
•
Verify the power connection wiring to the meter head.
•
Seal the meter head cabinet; seal the CT shorting block cabinet; seal the
distribution panel containing the CT’s.
Revised Dec-09
- 31 -
Customer Metering and Services Guide
Typical Arrangement for Multiple Customer Metering
This arrangement shows the supply transformer as delivering 347/600 V to the building.
If the supply voltage is 120/208 V, then the requirements for the dry type transformers
are eliminated.
Revised Dec-09
- 32 -
Customer Metering and Services Guide
Multiple Customer Metering
Quadlogic, MiniCloset 5, Meter Head & Junction Box
A. Box Connector Channel
B. CT Junction Box
C. Mini Current Transformers
D. MiniCloset 5 Meter Head
E. Meter Head Cabinet
F. Voltage Input & Fuse Block
G. CT Connection Terminals
Revised Dec-09
- 33 -
Customer Metering and Services Guide
Revised Dec-09
- 34 -
Customer Metering and Services Guide
FARM SERVICES
Farm services are generally services supplying farming operations in a rural area. The
system, up to the point of metering, is owned either by the Company or the Rural
Electrification Area Limited.
Farm and R.E.A.L. installations not covered by this guide will be handled by the local
Company office.
General Requirements
♦ Pole metering is the standard for Farm and R.E.A.L. services.
♦ With the Company’s approval an REA Customer may install a main breaker and
meter socket on a building.
♦ Where recessed metering is installed in a wall, a clear space of not less than 0.2
metres on either side of the centre line of the meter base and 1.0 metre in front of
the meter is required, to provide the Company access to the meters.
♦ The centre line of the meter socket shall be 1.5 to 1.8 metres above the finished
grade or permanent platform.
♦ The meter socket must not have a self shorting device.
Revised Dec-09
- 35 -
Customer Metering and Services Guide
Single Phase Farm Services − Metering
Single phase metering is used for farm services where the main breaker does not
exceed a rating of 200 amperes. For services less than 300 volts line to line, metering
shall be located on the line side of the Customer's main breaker. For services over 300
volts line to line, metering shall be located on the load side of the Customer's main
breaker.
General Requirements
♦ Meters may be located on the outside of a building except for where transformer
pole metering is installed.
♦ For all single phase services, a 4−jaw meter socket shall be used. See page 89,
Diagram of Socket Connections.
Overhead Farm Services
The Customer shall:
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
With permission install a CSA approved low voltage, socket type meter base on a
building, and;
•
Supply and install conduit, weatherhead, rack and conductor in the mast.
•
Supply secondary service conductors to the transformer secondary.
The Company shall:
•
Supply and install all primary facilities required for pole metering including the
multi-breaker box and the SE cable for the source.
•
Supply and install the meter.
Revised Dec-09
- 36 -
Customer Metering and Services Guide
Underground Farm Service
The Customer shall:
•
Supply and install the conduit for the Company's conductors to the meter socket
on the line side. Refer to drawing on page 22, Underground Residential Pedestal,
Service and Cable Stubbing Arrangement.
•
Supply and install the secondary service conductors from service pedestal or
transformer to the building. Connectors shall have NEMA spacing for connection
to a spade terminal.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
supply and install the primary facilities required for electrical service including the
underground metering pedestal, the line side underground cable and the breaker.
•
supply and install the meter.
Revised Dec-09
- 37 -
Customer Metering and Services Guide
Farm Type Metering
Dimensions in mm
X72 May 2009
Notes:
1.
With the company's approval, the REA Customer may install the main breaker and meter
socket on their residence or other building and the REA would own the facilities up to the
meter.
2.
Meter can be raised to prevent cattle rubbing.
Revised Dec-09
- 38 -
Customer Metering and Services Guide
Padmount Transformer and Underground Service on a Farm
Dimension in mm
SAS-R381-1 May 2009
Revised Dec-09
- 39 -
Customer Metering and Services Guide
Installation of Multi-Breaker Box for Farm Type Metering of 2 Services
Dimensions in mm
X73 May 2009
Revised Dec-09
- 40 -
Customer Metering and Services Guide
Single Phase Farm Services − Instrument Transformer Metering
Instrument transformer metering is used for farm services where the main breaker
exceeds a rating of 200 amperes. Metering shall be on the load side of the Customer's
breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ The meter shall be located on the inside of a building in the same room as the
instrument transformer enclosure, separated by a maximum of 6.5 metres. If the
meter cannot be accommodated inside the building, it may be located outside using
a Microlectric FA4B−6T , 6 jaw meter socket & test switch enclosure that houses
2 – 2 wire current transformers.
♦ For all single phase instrument services, a 6−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures – (1).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS for additional information.
Overhead Farm Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install the conduit, weatherhead, rack and conductors in the mast for
metering located on or in a building.
•
Supply secondary service conductors.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation and primary connection to the current
transformer (lugs).
The Company shall:
•
Supply and install the primary facilities required for electrical service.
•
Supply the current transformers.
•
Supply and install the meter.
Revised Dec-09
- 41 -
Customer Metering and Services Guide
Underground Farm Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
Supply and install the secondary service conductors from the service pedestal or
transformer to the building. Connectors shall have NEMA spacing for connection
to a spade terminal.
•
Be responsible for the installation and primary connection to the current
transformer (lugs).
The Company shall:
•
Supply and install all facilities required for electrical service up to and including
the service pedestal or padmount transformer.
•
Supply the current transformers.
•
Supply and install the meter.
Revised Dec-09
- 42 -
Customer Metering and Services Guide
Three Phase Farm Services − Metering
Three phase metering is used for farm services where the main breaker rating does not
exceed 200 amperes. For services less than 300 volts line to line, metering shall be
located on the line side of the Customer's main breaker. For services over 300 volts
line to line, metering shall be located on the load side of the Customer's main breaker.
General Requirements
♦ The meter may be inside a MCC electrical building for services over 300 volts line to
line. It may also be at the transformer or service pole.
♦ For three phase services, a 7−jaw meter socket shall be used. See page 90,
Diagram of Socket Connections – continued.
♦ The meter socket must not have a self shorting device.
♦ For services over 300 volts line to line the 7−jaw meter socket must have an
isolated neutral block.
Overhead and Underground Farm Service
The Customer shall:
•
supply and install a CSA approved low voltage, socket type meter base.
•
supply and install all wiring, equipment and facilities on the load side of the meter.
•
for overhead services, supply secondary service conductors.
•
for underground services, supply and install all secondary service conductors.
Connectors shall have NEMA spacing for connection to a spade terminal.
•
complete the secondary cable connections to the transformer secondary bushings
of the padmount transformer.
The Company shall:
•
supply and install the primary facilities required for electrical service.
•
connect the service conductors at the transformer pole.
•
supply and install the meter.
Revised Dec-09
- 43 -
Customer Metering and Services Guide
Three Phase Farm Services − Instrument Transformer Metering
Three phase instrument transformer metering is used for farm services where the main
breaker rating exceeds 200 amperes. Metering shall be on the load side of the
Customer's breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ The meter shall be located on the inside of a building in the same room as the
instrument transformer enclosure, separated by a maximum of 6.5 metres. If the
meter cannot be accommodated inside the building, it may be located outside in a
weatherproof cabinet. Refer drawing on page 76, Meter Requiring Instrument
Transformers.
♦ For all three phase instrument services, a 13−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures – (2).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS – for additional information.
Revised Dec-09
- 44 -
Customer Metering and Services Guide
Overhead and Underground Farm Services >200 Amps
The Customer shall:
•
Supply and install an appropriate CSA approved thirteen jaw meter socket and
test switch enclosure.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation of and primary connection to, the current
transformers (lugs) and the installation of the voltage transformers.
•
Be responsible for ensuring that the neutral wire is extended into the instrument
transformer enclosure.
•
Refer to page 80, 3 Phase, 4 Wire 120/208Y Volt Instrument Metering & page 81,
3 Phase, 4 Wire 277/480Y Volt or 3 Phase, 4 Wire 347/600Y Volt Instrument
Metering.
•
For overhead services, supply secondary service conductors.
•
For underground services, supply secondary service conductors. Connectors
shall have NEMA spacing for connection to a spade terminal.
•
Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
For underground services, supply and install all facilities required for electrical
service up to the padmount transformer.
•
Supply current and/or voltage instrument transformers and upon request ship the
equipment to the electrical contractor or manufacturer.
•
Supply and install the meter.
For the following three phase services or any other services not covered in this guide,
see the local ATCO Electric office prior to construction.
Overhead to Underground Farm Service
Underground to Overhead Farm Service
Underground Service from a Padmount Transformer − Farm Service
Revised Dec-09
- 45 -
Customer Metering and Services Guide
Revised Dec-09
- 46 -
Customer Metering and Services Guide
COMMERCIAL SERVICES
Commercial services are typically businesses that provide sales, transportation,
packaging, distribution, storage and accounting of goods and services.
General Requirements
♦ Where recessed metering is installed in a wall, a clear space of not less than 0.2
metres on either side of the centre line of the meter base and 1.0 metre in front of
the meter is required, to provide the Company access to the meters.
♦ The centre line of the meter socket shall be 1.5 to 1.8 metres above the finished
grade or permanent platform and in a properly lighted area.
♦ The meter socket must not have a self shorting device.
Revised Dec-09
- 47 -
Customer Metering and Services Guide
Single Phase Commercial Services − Metering
Single phase metering is used for commercial services where the main breaker rating
does not exceed 200 amperes. For services less than 300 volts line to line, metering
shall be located on the line side of the Customer's main breaker. For services over 300
volts line to line, metering shall be located on the load side of the Customer's main
breaker.
General Requirements
♦ Meters shall be located on the outside of a building except for where transformer
pole metering is installed.
♦ For all single phase services, a 4−jaw meter socket shall be used. See page 89,
Diagram of Socket Connections.
♦ The meter socket must not have a self shorting device.
Overhead Commercial Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base on the
building.
•
Supply and install conduit, weatherhead, rack and conductor in the mast for
metering located on a building.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
Supply and install the secondary conductors required for electrical service up to
the weatherhead.
•
Supply and install the meter.
•
For special applications, such as a Farm Customer going onto a Commercial rate
for grain drying, the Company shall supply and install a CSA approved low
voltage, socket type meter base for pole metering.
Revised Dec-09
- 48 -
Customer Metering and Services Guide
Underground Commercial Service
The Customer shall:
• Supply and install a CSA approved low voltage, socket type meter base.
• Supply and install the conduit for the conductors to the meter socket on the line
side.
• Supply and install the secondary service conductors from service pedestal or
transformer to the building.
• Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer. Connectors shall have NEMA spacing for connection
to a spade terminal.
• Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
• Supply and install all facilities required for electrical service up to and including
the service pedestal or padmount transformer.
• Supply and install meter.
Revised Dec-09
- 49 -
Customer Metering and Services Guide
Single Phase Commercial Services − Instrument Transformer Metering
Instrument transformer metering is used for commercial services where the main
breaker rating exceeds 200 amperes. Metering shall be on the load side of the
Customer's breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ The meter shall be located on the inside of a building in the same room as the
instrument transformer enclosure, separated by a maximum of 6.5 metres.
♦ If the meter cannot be accommodated inside the building, it may be located outside
using a Microlectric FA4B−6T, 6 jaw meter socket & test switch enclosure that
houses 2 – 2 wire current transformers.
♦ For all single phase instrument services, a 6−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures – (1).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS – for additional information.
Revised Dec-09
- 50 -
Customer Metering and Services Guide
Overhead Commercial Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install the conduit, weatherhead, rack and conductors in the mast.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation and primary connection to the current
transformer (lugs).
The Company shall:
•
Supply and install the secondary conductors required for electrical service up to
the weatherhead.
•
Supply the current transformers.
•
Supply and install the meter.
Revised Dec-09
- 51 -
Customer Metering and Services Guide
Underground Commercial Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation and primary connection to the current
transformer (lugs).
•
Supply and install secondary service conductors to the transformer. Connectors
shall have NEMA spacing for connection to a spade terminal.
•
Complete the secondary cable connections to the transformer secondary
bushings of the padmount transformer.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to and including
the padmount transformer.
•
Supply the current transformers.
•
Supply and install the meter.
Revised Dec-09
- 52 -
Customer Metering and Services Guide
Three Phase Commercial Services − Metering
Three phase metering is used for commercial services where the main breaker rating
does not exceed 200 amperes and 600 volts. For services less than 300 volts line to
line, metering shall be located on the line side of the Customer's main breaker. For
services over 300 volts line to line, metering shall be located on the load side of the
Customer's main breaker.
General Requirements
♦ For three phase services, a 7−jaw meter socket shall be used. See page 90,
Diagram of Socket Connections – continued.
♦ For services over 300 volts line to line the 7−jaw meter socket must have an
isolated neutral block as per Canadian Electrical Code.
♦ The meter socket must not have a self shorting device.
♦ The preferred location for 347/600 volt AMR metering is inside of a building.
Overhead and Underground Commercial Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
•
For overhead services greater than 150 kVA, supply secondary service
conductors.
•
For underground services, supply and install secondary service conductors from
the meter to the transformer. Connectors shall have NEMA spacing for
connection to a spade terminal.
•
Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
The Company shall:
•
For overhead services up to 150 kVA, supply and install conductors up to the
weatherhead.
•
For underground services, supply and install all facilities required for electrical
service up to and including the padmount transformer.
•
Supply and install the meter.
Revised Dec-09
- 53 -
Customer Metering and Services Guide
Three Phase Commercial Services − Instrument Transformer Metering
Three phase instrument transformer metering is used for commercial services where
the main breaker rating exceeds 200 amperes and/or 600 volts. Metering shall be on
the load side of the Customer's breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ The meter shall be located on the inside of a building or in an outdoor weatherproof
cabinet. The instrument transformer enclosure and the meter shall be in the same
room, separated by a maximum of 6.5 metres. Refer to on page 76, Meter
Requiring Instrument Transformers.
♦ For all three phase services, a 13−jaw meter socket and test switch enclosure shall
be used. See page 78, Meter and Test Switch Enclosures – diagram (2).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS – for additional information.
♦ Refer to drawing on page 69, Secondary Overhead to Underground Riser on a Pole
Revised Dec-09
- 54 -
Customer Metering and Services Guide
Overhead and Underground Commercial Services >200 Amps
The Customer shall:
•
Supply and install an appropriate CSA approved 13 jaw meter socket and test
switch enclosure.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation of and primary connection to, the current
transformers and the installation of the voltage transformers.
•
Be responsible for ensuring that the neutral wire is extended into the instrument
transformer enclosure.
•
Refer to page 80, 3 Phase, 4 Wire 120/208Y Volt Instrument Metering & page 81,
3 Phase, 4 Wire 277/480Y Volt or 3 Phase, 4 Wire 347/600Y Volt Instrument
Metering
•
For overhead services greater than 150 kVA, extend its supply conductors and
provide connectors to the secondary bushings of the Company's supply
transformer.
•
For underground services, supply and install secondary service conductors up to
the transformer. Connectors shall have NEMA spacing for connection to a spade
terminal.
•
Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
•
Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
•
For underground services, supply and install all facilities required for electrical
service up to and including the padmount transformer.
•
For overhead services up to 150 kVA, supply and install conductors up to the
weatherhead.
•
Supply current and voltage instrument transformers and upon request ship the
equipment to the electrical contractor or manufacturer.
•
Supply and install the meter.
Revised Dec-09
- 55 -
Customer Metering and Services Guide
Revised Dec-09
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Customer Metering and Services Guide
INDUSTRIAL SERVICES
Industrial services are generally large facilities where the primary function is in oilfield
operations, manufacturing and/or producing of a product.
General Requirements
♦ Where recessed metering is installed in a wall, a clear space of not less than 0.2
metres on either side of the centre line of the meter base and 1.0 metre in front of
the meter is required, to provide the Company access to the meters.
♦ Metering shall not be located on the pumpjack. Metering shall be located on a
remote or separate service pole (i.e.: a service pole or transformer pole) away from
the pumpjack.
♦ The centre line of the meter socket shall be 1.5 to 1.8 metres above the finished
grade or permanent platform and in a properly lighted area.
♦ The meter socket must not have a self shorting device.
Revised Dec-09
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Customer Metering and Services Guide
Single Phase Industrial Services − Metering
Single phase metering is used for industrial services where the main breaker rating
does not exceed 200 amperes. For services less than 300 volts line to line, metering
shall be located on the line side of the Customer's main breaker. For services over 300
volts line to line, metering shall be located on the load side of the Customer's main
breaker.
General Requirements
♦ Metering shall be located on the outside of a building except for where transformer
pole metering is installed.
♦ For all single phase services, a 4−jaw meter socket shall be used. See page 89,
Diagram of Socket Connections.
♦ The meter socket must not have a self shorting device.
Overhead Industrial Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base on the
building.
•
Supply and install conduit, weatherhead, rack and conductor in the mast for
metering located on a building.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
•
The Company shall:
•
Supply and install the secondary conductors required for electrical service up to
the weatherhead.
•
Conductors and connectors from pole to mast.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Underground Industrial Service
The Customer shall:
•
Supply and install a CSA approved low voltage, socket type meter base.
•
Supply and install the conduit for the conductors to the meter socket on the line
side.
•
Supply and install the secondary service conductors from service pedestal or
transformer to the building.
•
Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer. Connectors shall have NEMA spacing for connection
to a spade terminal.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
The Company shall:
•
Supply and install all facilities required for electrical service up to and including
the service pedestal or padmount transformer.
•
Supply and install meter.
Revised Dec-09
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Customer Metering and Services Guide
Single Phase Industrial Services − Instrument Transformer Metering
Single phase instrument transformer metering is used for industrial services where the
main breaker rating exceeds 200 amperes. Metering shall be on the load side of the
Customer's breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ Instrument Transformer cabinets may not be used as junction boxes to connect
secondary load conductors.
♦ The meter shall be located on the inside of a building or in an outdoor weatherproof
cabinet. The instrument transformer enclosure and the meter shall be in the same
room, separated by a maximum of 6.5 metres. Refer to page 76, Meter Requiring
Instrument Transformers.
♦ If the meter cannot be accommodated inside the building, it may be located outside
using a Microlectric FA4B−6T, 6 jaw meter socket & test switch enclosure that
houses 2 – 2 wire current transformers.
♦ For all single phase instrument services, a 6−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures – (1).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS – for additional information.
Revised Dec-09
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Customer Metering and Services Guide
Overhead Industrial Service >200 Amps
The Customer shall:
•
Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
•
Supply and install the conduit, weatherhead, rack and conductors in the mast.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation and primary connection to the current
transformer.
The Company shall:
•
Supply and install the secondary conductors required for electrical service up to
the weatherhead.
•
Supply the current transformer.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Underground Industrial Service >200 Amps
The Customer shall:
• Supply and install a CSA approved low voltage; six jaw meter socket and test
switch enclosure.
• Supply and install a Company approved instrument transformer enclosure. Refer
to page 75, INSTRUMENT TRANSFORMERS − for additional information.
• Be responsible for the installation and primary connection to the current
transformer.
• Supply and install the secondary service conductors to the transformer.
Connectors shall have NEMA spacing for connection to a spade terminal.
• Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
• Supply and install all wiring, equipment and facilities on the load side of the meter.
The Company shall:
• Supply and install all facilities required for electrical service up to and including
the padmount transformer.
•
Supply the current transformer.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Three Phase Industrial Services − Metering
Three phase metering is used for industrial services where the main breaker rating
does not exceed 225 amperes and a voltage of 600 volts. For services less than 300
volts line to line, metering shall be located on the line side of the Customer's main
breaker. For services over 300 volts line to line, metering shall be located on the load
side of the Customer's main breaker.
General Requirements
♦ The metering may be pole, panel or inside a MCC electrical building, depending on
the type of Customer application.
♦ For three phase services, a 7−jaw meter socket shall be used. See page 90,
Diagram of Socket Connections – continued. This includes oilfield services.
♦ The meter socket must not have a self shorting device.
♦ For services over 300 volts line to line the 7−jaw meter socket must have an
isolated neutral block as per Canadian Electrical Code.
♦ The preferred location for 347/600 volt AMR metering is inside of a MCC building.
Overhead and Underground Industrial Service
The Customer shall:
• Supply and install a CSA approved low voltage, socket type meter base.
• Supply and install all wiring, equipment and facilities on the load side of the meter.
• For overhead services greater than 150 kVA, extend its supply conductors and
provide connectors to the secondary bushings of the Company's supply
transformer.
• For underground services, supply and install secondary service conductors from
the meter to the transformer. Connectors shall have NEMA spacing for
connection to a spade terminal.
• Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
The Company shall:
• For overhead services up to 150 kVA, supply and install conductors up to the
weatherhead.
•
For underground services, supply and install all facilities required for electrical
service up to and including the padmount transformer.
•
Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
Three Phase Industrial Services − Instrument Transformer Metering
Three phase instrument transformer metering is used for industrial services where the
main breaker rating exceeds 225 amperes and/or 600 volts. Metering shall be on the
load side of the Customer's breaker.
General Requirements
♦ Metered and unmetered cable shall not be installed in the same auxiliary gutter or
splitter box. There shall be no elbows with covers (LB's) or pull boxes between the
instrument transformer cabinet and the meter socket.
♦ Instrument Transformer cabinets may not be used as junction boxes to connect
secondary load conductors.
♦ The meter(s) shall be located on the inside of a building in the same room as the
instrument transformer enclosure, separated by a maximum of 6.5 metres. If the
meter cannot be accommodated inside the building, it may be located outside in a
weatherproof cabinet. Refer to page 76, Meter Requiring Instrument Transformers.
♦ For all three phase instrument services, a 13−jaw meter socket and test switch
enclosure shall be used. See page 78, Meter and Test Switch Enclosures – (2).
♦ Refer to page 75, INSTRUMENT TRANSFORMERS, for additional information.
♦ Refer to drawing on page 69, Secondary Overhead to Underground Riser on a Pole.
Revised Dec-09
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Customer Metering and Services Guide
Overhead and Underground Industrial Services >200 Amps
The Customer shall:
•
Supply and install an appropriate CSA approved 13 jaw meter socket and test
switch enclosure.
•
Supply and install a Company approved instrument transformer enclosure. See
page 76, Meter Requiring Instrument Transformers.
•
Be responsible for the installation of and primary connection to, the current
transformers and the installation of the voltage transformers.
•
Be responsible for ensuring that the neutral wire is extended into the instrument
transformer enclosure.
•
Refer to page 80, 3 Phase, 4 Wire 120/208Y Volt Instrument Metering & page
81, 3 Phase, 4 Wire 277/480Y Volt or 3 Phase, 4 Wire 347/600Y Volt Instrument
Metering
•
For overhead services greater than 150 kVA, extend its supply conductors to
the secondary bushings of the Company's supply transformer.
•
For underground services, supply secondary service conductors from the meter
to the transformer. Connectors shall have NEMA spacing for connection to a
spade terminal.
•
Make the secondary cable connections to the transformer secondary bushings of
the padmount transformer.
•
Supply and install all wiring, equipment and facilities on the load side of the
meter.
The Company shall:
• For underground services, supply and install all facilities required for electrical
service up to and including the padmount transformer.
• For overhead services up to 150 kVA, supply and install conductors up to the
weatherhead.
• Supply current and voltage instrument transformers and upon request ship the
equipment to the electrical contractor or manufacturer.
• Supply and install the meter.
Revised Dec-09
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Customer Metering and Services Guide
ATCO Electric Standard for Self-contained Metering of 100 or 200 amp on an
Oilfield Service Pole
Dimensions in mm
SAS-X77 April 2008
Revised Dec-09
- 66 -
Customer Metering and Services Guide
Pole Metering for Oilfield Loads Over 200 Amps
Dimensions in mm
SAS-X78 May 2009
Revised Dec-09
- 67 -
Customer Metering and Services Guide
Customer Owned Metering in a Building, for Oilfield Loads Over 200 Amps
Dimensions in mm
X79 May 2009
Revised Dec-09
- 68 -
Customer Metering and Services Guide
Secondary Overhead to Underground Riser on a Pole
Dimensions in mm
X392 May 2009
See the Notes for this drawing on the next page.
Revised Dec-09
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Customer Metering and Services Guide
Notes:
1.
Customer is to supply connectors if conductors over 1000 kcmil in size or
multiple conductors per phase are used.
2.
Cover all connections with all weather tape or proper covers.
3.
Vertical conductors attached to a pole must be suitably protected. If the riser
cannot be placed where interference from vehicular traffic or pedestrian activity
will be minimal. Steel posts, concrete curbs or other approved means must be
used to protect the facilities.
4.
ATCO Electric recommends Customer install a ground at pole so no neutral
current from ATCO Electric circuit will flow to Customer's ground at main breaker.
5.
All Customers’ cable including single phase similar to Detail B must be mounted
on unistrut mounting brackets with the exception of X390 and X391.
6.
Unistrut comes in two sizes with a 216 or 381mm stand-off arm and the company
recommends using the shortest that is adequate.
7.
Unistrut mounting brackets will be provided by ATCO Electric.
8.
Rigid PVC or HFT conduit with a trade size of 2 1/2 or larger will be acceptable
with spacing between supports of 2.5 m, at one point only.
9.
ATCO Electric will locate Customer underground cable on a Customer’s property.
Agreement should be obtained that ATCO Electric is not liable for any dig ins as
the cable was installed and mapped by the Customer.
10.
Tech. Cable to be installed in rigid conduit. To avoid risers slipping through the
conduit, the risers should be planted firmly on the ground or clamped to an
approved cable tray.
Revised Dec-09
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Customer Metering and Services Guide
MICRO−GENERATION
Micro-Generation is defined as a generating unit that has a total nominal capacity of one
megawatt or less, exclusively uses sources of renewable or alternative energy, is
intended to meet all or a portion of the Customer’s electricity needs, connects to the
distribution system and is located on the Customer’s site or on a site owned by or
leased to the Customer that is adjacent to the Customer’s site.
Micro-Generation units must use electricity generated by a renewable or alternative
energy that is environmentally friendly fuel source such as solar panels, small-scale
hydro, wind, biomass and fuel cells.
General Requirements
♦ The Customer must comply with the “Application for Service & General
Requirements” of this guide for the required service type.
♦ The Customer is responsible for obtaining the electrical permit, any municipal
approvals and making commercial arrangements with a Retailer.
♦ The Customer must complete the application process requirement found on the
ATCO Electric web site (www.atcoelectric.com). Further information is available at
Alberta Utilities Commission at auc.ab.ca.
♦ The Company must post a warning label indicating the existence of dual voltage
supply adjacent to the meter(s).
Mini Micro-Generation
Mini micro-generation is defined as a generating unit which is using an inverter and has
a generation capacity of no more than 10kW and is generating electric energy solely for
the Customer’s own use.
The Customer is:
•
Required to meet with ATCO Electric to ensure the service connection details follow
the Alberta Utilities Commission guidelines and the Supply Authority requirements.
The Company shall:
•
Supply and install meter(s).
Revised Dec-09
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Customer Metering and Services Guide
Small Micro-Generation
Small micro-generation is defined as a generating unit of a normal capacity of less than
150 kW.
The Customer is:
•
Required to meet with ATCO Electric to ensure the service connection details follow
the Alberta Utilities Commission guidelines and the Supply Authority requirements.
The Company shall:
•
Supply and install meter(s).
Large Micro-Generation
Large micro-generation is defined as a generating unit of a normal capacity of at least
150 kW, but not exceeding 1 MW.
The Customer is:
•
Required to meet with ATCO Electric to ensure the service connection details follow
the Alberta Utilities Commission guidelines and the Supply Authority requirements.
The Company shall:
•
Supply and install the meter(s).
Revised Dec-09
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Customer Metering and Services Guide
TEMPORARY SERVICES & IDLE SERVICES
Temporary Services
Temporary service normally means service that will be required for two years or less. In
some cases, a longer period may be appropriate if both the Company and the Customer
know that the Customer has no intention of remaining on-site permanently. For
example, road construction camps sometimes require service for three years while they
are constructing a project such as a stretch of highway.
To determine whether a service is temporary contact your local Company office.
Idle Services
An idle service normally means a service that has been temporary disconnected for a
period of six to twelve months. The meter will normally have a disconnect sleeve
connected or the metering and associated facilities such as the transformer may be
temporarily removed. During the idle service period, the Customer will be billed on the
greater of the contract minimum as agreed upon in their Electric Service Agreement or
the rate minimum.
For service reconnection contact the local ATCO Electric office.
The local Company office or marketing representative can provide further details on idle
services.
The Retailer may hold all wires related charges until the service is reconnected. The
sum of the wires charges will then be passed on to the Customer.
Revised Dec-09
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Customer Metering and Services Guide
Revised Dec-09
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Customer Metering and Services Guide
INSTRUMENT TRANSFORMERS
ATCO Electric metering services, through a meter technologist or the local service
office, will supply current and voltage instrument transformers. Upon request, the
Company will ship the equipment to the electrical contractor or manufacturer.
The Customer is responsible for the installation and primary connection of the current
transformers and for the installation of the voltage transformers.
Instrument Transformer Enclosures
The Customer must provide and install a Company approved instrument transformer
enclosure.
On three phase installations the Customer is responsible for ensuring that the neutral
wire and all phase wires are connected inside the instrument transformer enclosure.
Instrument transformer metering requires a combination meter socket base and test
switch enclosure. Only socket type meters are approved for metering within ATCO
Electric.
Refer to:
page 78, Meter and Test Switch Enclosures
page 80, 3 Phase, 4W 120/208Y Volt Instrument Metering
page 81, 3 Phase, 4 W 277/480Y or 347/600Y Volt Instrument Metering
The Customer shall supply and install either a 6−jaw meter socket and test switch
enclosure, in the case of single−phase services, or a 13−jaw meter socket and test
switch enclosure, in the case of three−phase services.
A clear space of one metre is required in front of the enclosure. The Company will
place a decal label on the outside of the instrument transformer enclosure door. A
minimum clearance of 600 mm shall be maintained to pass by the edge of the door of
the enclosure which in the open position would block an exit route.
The instrument transformer enclosure shall have a minimum inside dimension of 760 x
760 x 250 mm (length x width x depth). The diagram on page 85 shows Window Type
Current Transformer, 700V Class for larger loads and on page 87 the specifications for
larger instrument transformer enclosures are given.
Indoor installation: double, vertically−hinged doors which swing open at least 110
degrees or a single−hinged door are acceptable. If the cabinet is in a high dust area it
must be a single weatherproof door type.
Outdoor installation: the instrument transformer cabinet must have a single
weatherproof door.
Enclosures for instrument transformers, meters and test switches shall have provisions
for locking and sealing.
Revised Dec-09
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Customer Metering and Services Guide
Meter Requiring Instrument Transformers
Typical arrangement for meter requiring instrument transformers
Notes:
1. The instrument transformer cabinet and the meter / test switch enclosure must be in the
same room.
2. Indoor instrument transformer cabinets may have double; vertically hinged doors which
swing open at least 110 degrees or a single−hinged door are acceptable. If the cabinet is in
a high dust area it must be a single weatherproof door type.
3. Metering shall be located inside a building. For oilfield and irrigation pump loads, metering
shall only be located inside a building or on a service / transformer pole. Metering shall not
be located on the pumpjack.
4. The electrical contractor shall not place a LB (elbow with cover) between the meter / test
switch enclosure and the instrument transformer cabinet.
Revised Dec-09
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Customer Metering and Services Guide
Typical Connections for 3 Phase 4 Wire Wye Services
Revised Dec-09
- 77 -
Customer Metering and Services Guide
Meter and Test Switch Enclosures
Single Phase (1)
Combined six terminal meter socket base
and 6 pole test switch enclosure with
provision for locking.
Three Phase (2)
Combined thirteen terminal meter socket
base and 10 pole test switch enclosure
with provision for locking.
Notes:
Dimensions in mm
1. For outdoor applications use a single door Weatherproof instrument transformer cabinet.
2. The electrical contractor shall not place a LB (elbow with cover) between the meter / test
switch enclosure and the instrument transformer cabinet.
3. If the meter socket and test switch enclosure is on top of the instrument transformer cabinet,
the minimum separation shall be 50mm.
4. For Single Phase 3 wire services greater than 200 amps, the Microlectric FA4B−6T may be
used. It is a combination 6 jaw meter socket and test switch enclosure that also houses 2 – 2
wire current transformers. It may be used for outside and inside applications.
Revised Dec-09
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Customer Metering and Services Guide
Single Phase, 3W 120/240 Volt Instrument Metering
Typical arrangement of a single phase, 3 Wire service, 120/240 volt instrument
metering.
Notes:
1. The Current Transformer secondary polarity mark must always be on the Line side.
2. The instrument transformer enclosure must be at least 760 x 760 x 250 mm. (H x W x D)
3. A combination six terminal meter socket and test switch enclosure is required as shown on
page 78 (1), Meter and Test Switch Enclosures
4. The electrical contractor shall not place a LB (elbow with cover) between the meter / test
switch enclosure and the instrument transformer cabinet.
5. The electrical contractor shall ensure that the connection to the current transformer is made
with the correct bolt size and is tight.
Revised Dec-09
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Customer Metering and Services Guide
3 Phase, 4W 120/208Y Volt Instrument Metering
Typical arrangement of a 3 phase, 4 wire 120/208Y volt instrument metering within an
instrument transformer enclosure for a 200 to 1200 ampere service.
Notes:
1. The Current Transformer secondary polarity marks must always be on the line side.
2. The instrument transformer enclosure must be at least 760 x 760 x 250 mm (H x W x D).
3. A combination 13 jaw meter socket and pre−wired test switch enclosure is required as
shown on page 78 (2), Meter and Test Switch Enclosures.
4. The neutral conductor must be brought in to the instrument transformer cabinet from the star
point of the transformer to an isolated neutral block as per the Canadian Electrical Code.
5. The electrical contractor shall not place a LB (elbow with cover) between the meter / test
switch enclosure and the instrument transformer cabinet.
6. The electrical contractor shall ensure that the connection to the current transformer is made
with the correct bolt size and is tight.
Revised Dec-09
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Customer Metering and Services Guide
3 Phase, 4W 277/480Y or 347/600Y V Instrument Metering
Typical arrangement of a 3 phase, 4 wire 277/480Y or 347/600Y volt instrument
metering within an instrument transformer enclosure for a 200 to 1,200 ampere service.
Note: Not all 277/480 volt services will have Voltage Transformers (VT’s / PT’s), some
will have 277 volt transformer rated meters.
See the circuit Notes on the next page.
Revised Dec-09
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Customer Metering and Services Guide
Notes:
1. The Current Transformer secondary polarity marks must always be on the line side.
2. The electrical contractor shall ensure that the connection to the current transformer is made
with the correct bolt size and is tight.
3. The Voltage Transformer Primary should point towards the CT’s
4. The instrument transformer enclosure must be at least 760 x 760 x 250 mm (H x W x D).
5. A combination 13 jaw meter socket and pre−wired test switch enclosure is required as
shown on page 78 (2), Meter and Test Switch Enclosures.
6. The neutral conductor must be brought in to the instrument transformer cabinet from the star
point of the transformer to an isolated neutral block as per the Canadian Electrical Code.
Mounting or Fastening Instrument Transformers
The most common method is to attach the instrument transformers to the back plate
with self tapping metal screws.
If the instrument transformers are bolted to the back plate the following method must be
used.
Notes:
1. The instrument transformers must be mounted using all the mounting holes supplied by the
manufacturer.
2. The Company must be able to remove the instrument transformers without removing the
back plate.
Revised Dec-09
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Customer Metering and Services Guide
3 Phase, 4W 347/600Y V Instrument Metering − AMR Equipped
Notes:
1. ATCO Electric supplies and installs the External 2 kVA signaling transformer for AMR.
2. Space of 450 X 450 mm is required at the instrument transformer cabinet to mount the unit.
3. All wiring of AMR equipment is completed by ATCO Electric.
Revised Dec-09
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Customer Metering and Services Guide
2 Wire Current Transformer 700V Class
Typical outline of a 2 wire current transformer 700 volt class, bar type, 50 to 1200
amperes.
Dimensions in mm / in
Revised Dec-09
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Customer Metering and Services Guide
Window Type Current Transformer, 700V Class
Typical outline of a dual ratio window type current transformer, 700 volt class, 1,200 −
2,000 amperes.
Dimensions in mm
Note: Window type current transformers require an instrument transformer enclosure of at
least 1200 x 900 x 300 mm (H x W x D)
Revised Dec-09
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Customer Metering and Services Guide
Voltage Transformer 700V Class
Typical outline of a voltage transformer 700 volt class
Dimensions in mm / in
Revised Dec-09
- 86 -
Customer Metering and Services Guide
MANUFACTURED SWITCHGEAR FOR SERVICES & METERING
For 600 volt switchgear, the instrument transformer compartment shall be a minimum
height x width x depth of:
•
760 x 760 x 250 mm for 200−1200 amp size,
•
1200 x 900 x 300 mm for 1201−2000 amp size, and
•
1200 x 900 x 450 mm for 2001−4000 amp size.
On CSA approved metal−clad (not cubicle) switchgear some deviation from the above
sizes is permitted with prior approval from the Company.
For 5000 volt switchgear, the instrument transformer compartment shall be a minimum
height x width x depth of 1250 x 900 x 450 mm. The minimum size of conductor leads
for the VT primary leads is to be No. 8 AWG shield 5 kV cable.
Indoor/Outdoor Switchgear
For service greater than 200 amps and up to 750 volts with Customer owned
switchgear, indoor metering is preferred. Oilfield service metering shall be pole
mounted as shown in diagram on page 67. For 5−25 kV services, the Company prefers
outdoor pole mounted primary metering.
Transducer/Sensing Connections in Switchgear
On indoor Customer−owned switchgear the only Customer load connections permitted
ahead of the Company metering are load characteristic sensing transducers (i.e.:
current or voltage and/or phase sequence or ground fault sensing devices) and transfer
switch sensing devices required for main breaker control tripping and safety. All other
transducers (i.e.: panel display lighting, panel meters, motor trip/close actuators and
auxiliary sensing and power supply services) are to be connected on the load side of
the Company's metering.
Manufacturer/Consultant's Drawings for Switchgear
Prior to the manufacturing of the switchgear, the Customer shall submit three copies of
the manufacturers or consultants drawings including dimensions of the main breaker
cubicle, the control and sensing compartment and the metering compartment.
Drawings shall include single line diagrams of all Customer control and sensing devices
connected on the line side of the Company's metering.
Revised Dec-09
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Customer Metering and Services Guide
CT Cabinet and Switchgear Enclosure
The CT cabinet of the switchgear shall be at least 100 mm above the floor and the
switchgear enclosures height shall be no more that 2400 mm above the floor. The
enclosure door(s) shall swing open a minimum of 110 degrees. Two vertically hinged
doors are preferred; however a single−hinged door is acceptable. Provisions for locking
the door(s) of the CT cabinet must be provided.
Warning Signs for Manufactured Switchgear
The Customer shall place a sign warning of live (fused) components, even if the breaker
is open in a conspicuous location near the main breaker.
Revised Dec-09
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Customer Metering and Services Guide
APPENDIX
Diagrams of Socket Connections
Revised Dec-09
- 89 -
Customer Metering and Services Guide
Diagram of Socket Connections – continued
Revised Dec-09
- 90 -
Customer Metering and Services Guide
Wiring Diagram for Grounding Resistors
See the Ground Resistor notes on the next page.
Revised Dec-09
- 91 -
Customer Metering and Services Guide
Notes:
1.
Transformer primary; ground the primary star point, transformer case and
interconnect with ground from lightning arresters, if installed. The secondary
neutral is grounded through the ground resistor.
2.
At the transformer, the Customer's main breaker and the instrument transformer
enclosure, install a sign reading "Caution grounding resistor installed. Do not tie
secondary neutral to case ground." Obtain the sign from metering services.
3.
The design of the ground resistor must be coordinated with ATCO Electric
engineering.
4.
On star−star transformers, the internally connected primary and secondary
grounds must be separated.
5.
Where the ground resistor is installed inside a substation, the resistor case
ground and the transformer case must be interconnected to the ground.
6.
The Customer is to install an insulated bushing for the neutral weather proof
(WP) conductor which is allowed to pass through the main breaker. The neutral
is only for the star point for the metering.
7.
An installation of 5 kV or 25 kV metering on a secondary service is similar to the
above and must include a means for disconnecting the service on the supply side
of the metering set.
8.
The conductor from the X0 transformer bushing to the ground resistor must be
encased in PVC conduit and the lead from the ground resistor to the Customer's
building must be mechanically protected from damage with conduit, unless
protected by elevation above ground.
9.
Refer to Canadian Electrical Code − Part 1, 10−1100 to 10−1108 for conductor
sizing and installation of neutral grounding devices.
Revised Dec-09
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Customer Metering and Services Guide
Design Clearances on Underground Distribution
Dimensions in metres
D-SC60-1 May 2009
Notes:
A.
The Canadian Electrical Code Rule 26-242 applies.
B.
If a transformer is placed closer than 3m to a metal building, the owner is required to
burry a No.4 copper conductor as a gradient control wire around and 0.5 to 1.0 metres
away from the building, buried 200 to 300 mm below ground level with interconnection to
the building and to the ATCO Electric gradient control wire.
C.
The doors on the switch cubicle and padmounted transformer must not face each other
without adequate work space of at least 4.5m.
D.
If the doors on the switch cubicle are not located on the side of the cubicle adjacent to
the building, the distance between the building and the cubicle may be reduced to 1.0m.
In all installations there must be work space of at least 4.5m in front of the doors.
Revised Dec-09
- 93 -
Customer Metering and Services Guide
Sizing of Building Alcove for Locating a Padmounted Transformer
Dimensions in mm
D-SC61 May 2009
Notes:
1.
Minimum clearance from pad to building in alcove does not apply to footings for vault
pads which may extend right up to the building foundation.
2.
If a suitable fire resistant wall or barrier is constructed, this distance may be reduced to
line of sight distance.
3.
The accessible work area in front of the padmounted transformer of adequate strength to
install a transformer or to raise and remove a transformer.
Revised Dec-09
- 94 -
Customer Metering and Services Guide
Typical Alignment on Front Street Monolithic Curb / Sidewalk
Dimensions in mm
D-SC64 December 2008
Revised Dec-09
- 95 -
Customer Metering and Services Guide
Typical Alignment on Front Street Boulevard / Rear Traffic Lane
Dimensions in mm
D-SC62 May 2009
Revised Dec-09
- 96 -
Customer Metering and Services Guide
Typical Alignment on Rear Lot Utility Lane / Rear Easement Access
Dimensions in mm
D-SC63 May 2009
Revised Dec-09
- 97 -
Customer Metering and Services Guide
Landscaping Adjacent to Underground Electrical Equipment
D-H25-1 May 2009
Revised Dec-09
- 98 -
Customer Metering and Services Guide
Landscaping Adjacent to Padmount Transformer and Pedestal
D-H25-2 May 2009
Revised Dec-09
- 99 -
Customer Metering and Services Guide
Landscaping Adjacent to Padmount Switch Cubicle or Street Light
D-H25-3 May 2009
Revised Dec-09
- 100 -
Customer Metering and Services Guide
Protective Guard Posts for Padmounted Transformer or Switching Cubicles
(Open Areas)
Dimensions in metres
D-H26-1 May 2009
Revised Dec-09
- 101 -
Customer Metering and Services Guide
Protective Guard Posts for Padmounted Transformer Located in Alcoves
Dimensions in metres
D-H26-2 May 2009
Revised Dec-09
- 102 -