CONSOLIDATED EDISON CO. OF NEW YORK, INC.
4 IRVING PLACE
NEW YORK, NY 10003
DISTRIBUTION ENGINEERING DEPARTMENT
NON-NETWORK SYSTEMS SECTION
SPECIFICATION EO-6224
REVISION NO. 10
DECEMBER 2005
TRENCHING REQUIREMENTS FOR INSTALLING URD CABLES
IN CONDUIT OR DIRECT BURIED AND JOINT TRENCHING
FILE: CONSTRUCTION STANDARDS
MANUAL NO. 3: SECTION 16
URD MANUAL NO. 22, SECTION 2: CABLES
URD MANUAL NO. 24, SECTION 2: CABLES
TARGET AUDIENCE
URD CONSTRUCTION
NESC 2002 REFERENCE
SECTION NO. 35
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
TABLE OF CONTENTS
SECTION
DESCRIPTION
1.0
PURPOSE
2.0
APPLICATION
3.0
GENERAL REQUIREMENTS
4.0
LOCATION OF TRENCHES
5.0
TRENCH SIZES
6.0
REQUIREMENTS FOR CABLE PROTECTION
7.0
PRIMARY AND SECONDARY CABLES INSTALLATION
8.0
BACKFILL FOR TRENCHES
9.0
SUPPLY TO STREET LAMPPOSTS
10.0
LOCATION OF URD VAULTS AND SPLICE BOXES
FOR SUBSURFACE TRANSFORMERS
11.0
LOCATION OF BOX PADS AND SPLICE BOXES
FOR PAD MOUNTED TRANSFORMERS
12.0
EXCAVATION AND BACKFILL FOR URD VAULTS,
SPLICE BOXES, AND TRANSFORMER
FIBERGLASS BOX PADS
13.0
INSTRUCTIONS FOR DIGGING AFTER ELECTRIC
CABLES ARE INSTALLED
14.0
IDENTIFICATION OF BURIED ELECTRIC CABLES OR
CONDUITS
15.0
PRIVATE STREETS ON PRIVATE PROPERTY
16.0
SEPTIC TANK AREAS
17.0
REFERENCES
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
TRENCHING REQUIREMENTS FOR INSTALLING URD CABLES
IN CONDUIT OR DIRECT BURIED AND JOINT TRENCHING
1.0
PURPOSE
This standard gives the requirements for installing URD cables in conduit or
direct buried in public and private streets and in joint trenches where the same
trench shall be used to install electric, gas, water, sewer and communication
lines.
2.0
APPLICATION
This specification applies to all Regions, except Manhattan.
3.0
GENERAL REQUIREMENTS
The provisions in the specification apply to both public and private streets,
unless stated otherwise. Private street, in this specification, refers to roadways
in developments where the land surrounding each house is all corporationowned. For further discussion on private streets refer to paragraph 15.0. For
trench layout and/or excavation operation around trees, when practical, follow
recommendations of the National Arbor Day Foundation (Field Pocket Guide for
Qualified Utility Workers) to prevent or minimize damage to tree roots, bark or
branches.
For general use requirements of conduit system in URD developments, see
EO-1136. Follow EO-3036 for installation of HDPE (High Density Polyethylene)
conduits.
4.0
LOCATION OF TRENCHES
4.1
Trenches and/or excavation for equipment shall be laid out and dug in a
manner so as to prevent or minimize damage to nearby/adjacent trees.
Recommendations on minimum distance from trees, alternative conduit
installation (e.g., tunneling or other approved no-dig techniques),
possible spot tree trimming for construction equipment access, etc., are
detailed on The National Arbor Day Foundation Guide.
4.2
The main trench for conduit or direct buried primary or secondary cables
shall be located between the curb and the property line, where possible,
depending upon sidewalk’s dimensions and local municipality codes or
recommendations of the National Arbor Day Foundation Guide. The
trench shall be parallel to the roadway. Roadway crossing trenches
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
shall be perpendicular to the roadway and aligned to disturb the least
amount of pavement.
4.3
Where a sidewalk is planned, the trench should preferably be located
under the sidewalk in New York City as shown on Figure 1A and
between the sidewalk and property line in Westchester as shown on
Figure 1B.
4.4
Where no sidewalk is planned, the edge of the cable trench should be
located minimum 4 feet from either the property line or curb (preferably
from the property line if it can be identified to avoid accidental digging)
as shown on Figure 1C.
4.5
Paragraphs 4.2, 4.3 and 4.4 give the preferred trench locations.
However, it may not be practical to locate the main trench as shown on
Figures 1A, 1B and 1C. Some reasons are:
4.6
4.5.1
Sidewalk locations cannot be obtained from New York City, or
the local municipality or the developer;
4.5.2
Sidewalks already exist before the construction begins;
4.5.3
Interference with or inadequate separation from installed gas
pipes;
4.5.4
Interference with or inadequate separation from proposed or
installed water pipes, sewer pipes or drainage system;
4.5.5
High rock concentration; and
4.5.6
Route adjustment is needed to prevent or minimize damage to
existing trees during trenching operations.
If the main trench cannot be located as indicated in paragraphs 4.2, 4.3
and 4.4, the alternate locations are as follows, listed in order of
preference, depending on the municipality.
4.6.1
Alternate locations when sidewalks are planned:
a.
Under sidewalk on side closest to the street (see Figure
1D);
b.
Between sidewalk and the property line (see Figure 1B),
(preferred in Westchester);
CONSTRUCTION STANDARDS
MANUAL NO. 3
4.6.2
5.0
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EO-6224 REVISION 10
DECEMBER 2005
c.
Between sidewalk and the curb without interfering with
sewers, catch basins or other public utilities;
d.
Under the street, one foot from the curb (see Figure 1E)
without interfering with sewers, catch basins or other public
utilities. In New York City the cable must be installed in
Company approved conduits. This is the least preferred
location.
Alternate locations when no sidewalks are planned:
a.
Between property line and the curb, minimum four feet
from either the property line or the curb (preferably from
the property line if it can be identified to avoid accidental
digging and to leave space for trees planting along the
curb).
b.
Under the street, one foot from the curb (see Figure 1E)
without interfering with sewers, catch basins or other
utilities. This is the least preferred location.
4.7
In New York City, prior to construction, the Company shall obtain
sidewalk locations from the City’s Department of Transportation (Bureau
of Highways) and in Westchester from the local municipality.
4.8
All other alternate locations for the main trench require the approval of
the region’s Electric Operations Manager of Distribution Engineering.
TRENCH SIZES
5.1
The maximum depth and width of trench for secondary (including street
light) and communication cables shall be as shown on Figure 2A-1 for
direct buried or Figure 2A-2 for conduit installation.
5.2
The maximum depth and width of trench of primary, secondary,
(including street light) and communication (telephone or CATV, etc.),
shall be as shown on Figure 2B-1 for DBC or Figure 2B-2 for conduit
installation.
5.3
The maximum depth and width of trench of primary, secondary
(including street light) communication, gas or water shall be as per
Figure 2C-1 for DBC and 2C-2 for conduit installation.
5.4
The maximum depth and width of trench for electric cables and/or
secondary, street lighting and/or communication cables and gas pipes
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
shall be in accordance with Figure 2C-1 and 2E-1. Follow 2C-2 and 2E-2
for cables in conduit. Electric facilities shall be installed first at the
bottom of the trench, along with gas lines, followed by communications
and other lines.
6.0
5.5
In rock areas where bottoms of the cable trenches cannot be kept
smooth, all trenches for direct buried cables and gas pipes shall be 4
inches deeper than shown on Figure 2A-1 through 3B-1 and backfilled
according to paragraphs 8.1 and 8.2. For installation of conduit in rocky
areas, follow EO-3036.
5.6
Maximum depth and width of trench and minimum cover dimensions
shall be maintained at all times regardless of whether the trench is jointly
occupied, or whether the trench is dug to repair facilities.
5.7
Refer to EO-5571-B for typical installation of electric conduits and gas
mains in common trench, and Dwg. #304963 for trench excavation for
direct buried HDPE conduits alone in a trench.
5.8
The trench depths specified in paragraphs 5.2 through 5.4 shall not
exceed 48 inches for cable installation, unless it is necessary to avoid
interference with other facilities, or in order to maintain minimum
clearances between facilities. All depths shall be referenced to final
grade over the trench.
REQUIREMENTS FOR CABLE PROTECTION
6.1
6.2
For cases, where the cable is installed direct buried between the curb
and the property line, the installation can be done at there areas:
6.1.1
Main trench;
6.1.2
From main trench to curb in road crossings;
6.1.3
From main trench to property line in service trenches.
The cables must be installed in conduit under the following conditions:
6.2.1
Where cables cross under a roadway, sidewalk, driveway or
parking lot. A nominal cover of 24 inches below grade shall be
maintained. If due to subsurface conditions the cover is less
than 24” (but never less than 18”), protect the conduit and the
cable with a 3/8” steel plate of same width as the trench.
CONSTRUCTION STANDARDS
MANUAL NO. 3
7.0
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EO-6224 REVISION 10
DECEMBER 2005
6.2.2
Where proper clearances between electric cables and other
utilities cannot be obtained.
6.2.3
For road crossings where the roads are being paved before
cable installation, or where conduit installation eliminates the
need for stand-by crews by providing a more flexible work
schedule.
6.2.4
For other field conditions as outlined on EO-1136.
6.3
In New York City, service cable on customer’s property shall be installed
in a steel pipe or other approved conduit in accordance with the New
York City Electrical Code (NYC Electrical code was merged with the
National Electrical Code (NEC) in July 2003). The customer shall be
required to extend the customer’s conduit to the property line and
connect to the company’s approved conduit, and to seal the end with
duct seal as specified on EO-1100. A coupling of adequate strength and
proper size shall be used to firmly join the customer’s or Company’s
conduits. In Westchester, service cable shall also be installed in
Company approved conduit unless local municipal codes specify
otherwise.
6.4
Duct locations shall be recorded on Company layouts.
6.5
A warning tape (c/s #024-6496) shall be laid continuously in the trench at
the bottom of the last 12” layer of backfill covering the cables in conduit
or direct buried cables.
INSTALLATION OF PRIMARY AND SECONDARY CABLES
7.1
In most cases, the primary supply from each feeder consists of three
cables, one for each phase. In this specification, each set of three
primary cables is called a primary feed.
7.2
In a common trench two primary feeders can be installed with a
minimum of 6 inches clearance from each other as shown in Figure 3A.
When gas mains are also installed in the same common trench, the
clearances shall be as shown in Figure 3B.
Notes: 1.
In the remaining paragraphs of this specification, street
lighting cables are to be considered as secondary cables.
Whatever applies to secondary cables shall be applicable
to street lighting cables also.
CONSTRUCTION STANDARDS
MANUAL NO. 3
2.
7.3
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EO-6224 REVISION 10
DECEMBER 2005
Install minimum #2 bare copper wire along 1/0 aluminum
primary cable and minimum 2/0 bare copper wire for 4/0
aluminum primary cable. It shall be buried in close
proximity of the jacketed cable and in continuous contact
with earth. Install only one copper wire whether the
primary is one phase or three phases.
Separation Between Electric, Communication and Gas Line and
Other Facilities
Minimum separations in inches between cables/conduits/pipes containing
electric and communication cables, gas lines and other facilities shall be
maintained as shown on Figures 2B, 2C, 2D, 2E and 3B for direct buried
cable or cable-in-conduit. For proper protection of gas mains and
services, refer to general specifications G-8100 & G-8005. At buried
facility crossings, a minimum vertical separation of 12 inches shall be
maintained between Company electric (direct buried or in-conduit) and/or
gas lines and sewer and/or water pipes and/or any other underground
facilities owned/installed by others. Direct buried cables are installed side
by side. No separation is required between them except for two different
primary feeders installed in the same trench (see Figure 3A).
8.0
BACKFILL FOR TRENCHES
8.1
All backfill material for trenches shall be clean, free of stones greater
than 2 inches in diameter, cinders and ashes. A minimum 4 inches
cushion of sand type 3/8 inch shall be placed beneath the cables where
there is no gas pipe installed. Where there is gas pipe installed in the
same trench a sand cushion of 4 inches shall be provided for both
including rock areas. Backfill on top of cables up to 6 inches shall be
sand type 3/8 inch in accordance with Purchase and Test Specification
EO-8085.
8.2
The trench shall be backfilled with sand type 3/8 inch to a height of 12
inches above the cables. It shall be compacted by hand tamping in no
more than 12 inches wetted lifts. The remaining trench shall be
backfilled with suitable backfill material type II and shall be machine
tamped.
8.3
For cables installed in street trenches only refer to Construction
Standards EO-1181 for backfilling requirements. For backfilling of
trenches other than street, follow paragraphs 8.1 and 8.2.
CONSTRUCTION STANDARDS
MANUAL NO. 3
8.4
9.0
10.0
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EO-6224 REVISION 10
DECEMBER 2005
Place sand bags 6” x 6” x 12” between electric and gas to maintain
required clearances. The sand bags shall be placed approximately
fifteen feet apart.
SUPPLY TO STREET LAMPPOSTS
9.1
The street lighting cables are installed in the URD main trench (see
Figures 1A to 1E) to a point within 2 feet from the proposed lamppost
foundation. Where the cables leave the main trench to cross the street
they are installed in an approved conduit in a road-crossing trench, to
the lamppost foundation. The protection of these cables is in
accordance with paragraph 6.0 (See Figures 1A to 1E). Each lamppost
foundation furnished by the builder/customer shall have an approved
driven ground rod. The grounded neutral of supply cables shall be
connected to the lamppost base, and bonded to the lamppost conduit, if
metallic, then all grounds shall be connected to the driven ground rod as
per EO-5830-C, and in accordance with the New York City Electrical
Code, or, in Westchester, according to local municipal codes. Company
crews should not make final connections to the street lights unless the
customer/builder submits written evidence to the Company that an
approved driven ground rod has been installed and connected to the
system ground at the base of the street lamppost as required.
9.2
A street lighting overlay approved by the municipality will be furnished by
the builder indicating the location of the proposed street lights on private
property and on which the City will indicate the location of the proposed
street lights. In Staten Island, the “Street Light Agreement” between
Consolidated Edison and the City of New York dated June 6, 1980 (or
applicable latest date) shall be followed.
9.3
Supply for lampposts on private property shall be extended by the
property owner from the easement line (see paragraph 15.5) to the
lamppost(s), in accordance with the New York City Code or in
Westchester, in accordance with local municipal codes.
LOCATION OF URD VAULTS AND SPLICE BOXES FOR SUBSURFACE
TRANSFORMERS
10.1
A URD system with subsurface transformer uses direct buried or inconduit primary and secondary cables, and URD type transformer vaults
and splice boxes. Refer to EO-2083 for more details on URD system.
10.2
The URD type transformer vaults and splice boxes shall be located
between the property line and the curb, at least 6 inches from the
property line and never in front of a driveway. This is shown on Figure
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
4A. If water or sewer pipes are obstructing the installation, the vault and
splice box shall be installed in a non-obstructed area between the
property line and the curb.
10.3
The transformer vaults and splice boxes shall be located on the side lot
line between homes, whenever possible, and shall be aligned with lot
line rather than directly in front of one customer’s home.
10.4
Where sidewalks are present, the vault and splice box shall be installed
as shown on figure 4B or 4C, depending on the dimensions of the
sidewalk indicated. If there is not enough room to fit the vault and splice
box in this area, some portion of the vault or box shall be in the sidewalk
area, as shown on Figure 4B. Where necessary the splice box (with
cover at grade level) may be located entirely within the sidewalk area, If
water or sewer pipes are obstructing the installation, the vault and splice
box shall be located between the sidewalk and curb. Vaults and boxes
shall clear driveway areas. Wherever possible, a 5 ft. easement should
be obtained from the builder to permit the splice box to be located out of
the sidewalk area.
10.5
When paving around the vault or splice box, the following conditions
shall be met:
10.5.1 The final paving of the sidewalk shall not be more than 1/8 inch
above or below the top of the vault grate or splice box cover.
10.5.2 The final paving of the sidewalk shall have a separation from the
vault grate by at least 1/8 inch but no more than 1/4 inch, as
shown on Figure 4B.
10.6
The transformer and splice box vault shall always be installed a
minimum of:
10.6.1 12 inches from the nearest gas pipe.
10.6.2 12 inches from the nearest liquid petroleum lines.
Note:
10.7
In Westchester, the minimum clearances shall be in accordance
with municipal requirements.
The cables between the transformer enclosure and the main run shall
be, in general, perpendicular from the main run.
CONSTRUCTION STANDARDS
MANUAL NO. 3
10.8
11.0
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EO-6224 REVISION 10
DECEMBER 2005
When field conditions or development layout preclude the installation of
fiberglass transformer vaults between the curb and the customers
property line, a precast concrete vault (Dwg. #305154) shall be placed in
the street at about 12” away from the curb. The concrete vault shall be
installed a minimum of four feet away from driveways.
LOCATION OF BOX PADS AND SPLICE BOXES FOR PAD MOUNTED
TRANSFORMERS
11.1
The URD system utilizes mini-padmounted transformers (preferred
method) as per EO-2083; uses direct buried primary and secondary
cables or cables-in-conduits (as required); fiberglass transformer box
pads and splice boxes (where required by the number of homes to be
supplied).
11.2
The box pads and splice boxes shall be located between the property
line and the curb, minimum 3 inches from the property line, and
minimum four feet from a driveway or curb (see Figure 6A). If water or
sewer pipes obstruct this installation, the box pad and splice box shall be
installed on customer’s property, between a 5 feet easement line and the
property line (see Figures 6B and 6C).
11.3
The transformer fiberglass box pads shall be located on the side lot line
between homes, whenever possible, and shall align with the lot line
rather than directly in front of customer’s home. The installation of the
transformer box pad shall be in such a way that the front of the
transformer will face the street.
11.4
Where sidewalks are present and sufficient space exists, the preferred
location of the box pad and splice box shall be at least four feet from the
sidewalk, whenever possible towards the property line in accordance
with drawing EO-15351-A. A 5 feet easement shall be obtained on
customer’s property, where needed (see Figure 6B). Where necessary,
the splice box (with cover at grade level) may be located entirely within
the sidewalk area.
11.5
The box pad and splice box installation shall conform to the
requirements outlined in paragraphs 10.1 through 11.4 and in
accordance with drawings EO-15351-A and EO-16348-A.
CONSTRUCTION STANDARDS
MANUAL NO. 3
12.0
13.0
14.0
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EO-6224 REVISION 10
DECEMBER 2005
EXCAVATION AND BACKFILL FOR URD VAULTS, SPLICE BOXES, AND
TRANSFORMER FIBERGLASS BOX PADS
12.1
The required excavation for installing submersible URD vaults and splice
boxes shall be in accordance with Figure 6 and drawing EO-12833-A.
12.2
The required excavation for installing the transformer box pads shall be
in accordance with Figure 7 and in accordance with installation drawing
EO-15351-A.
12.3
All backfill material for U.R.D. vaults, splice boxes and box pads shall be
free of stones greater than two inches in diameter and tamped by hand.
Voids around/below the boxes/pads shall be eliminated.
INSTRUCTIONS FOR DIGGING AFTER ELECTRIC CABLES ARE INSTALLED
13.1
To prevent accidental dig-ups of buried or in-conduit electric cables
during operations by non-Company personnel (water, sewer, gas,
communication cables or others), the Company shall be notified by the
proper authorities before digging in accordance with New York State
Industrial Code 753. Upon this notification, the Company shall provide
assistance in locating the installed electric cables.
13.2
A permanent tag shall be affixed in accordance with EO-14505-D to
transformer gratings of subsurface transformer and to the outer cover of
the mini-padmounted transformers in accordance with EO-6228. The
tag shall include a general warning that electric cables are in the area
and that the one-call center of NYC or Westchester shall be contacted
prior to digging in the area.
IDENTIFICATION OF BURIED ELECTRIC CABLES OR CONDUITS
14.1
Primary Cables – The Company’s primary cables shall consist of one,
two or three cables (depending upon number of phases required)
positioned close to each other and will have “Property of Consolidated
Edison” stenciled on them.
14.2
Secondary Cables – The Company’s secondary cables shall be singlephase 3 wires or three phases 4 wire depending upon the required load.
Single phase shall consist of three single leg cables (two plain black and
the third wire is black with green or yellow stripes) wrapped around each
other and three phase shall consist of four single leg cables (red, green,
yellow and black) laid close to each other. All these cables shall have
“Property of Consolidated Edison” stenciled on them.
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
14.3
Street Lighting Cables – The Company’s street lighting cables shall
consist of two single legs wrapped around each other and will have
“Property of Consolidated Edison” stenciled on them.
14.4 Cables-in-conduit—For cables-in-conduit cases, the conduits shall be
prominently and permanently marked with the “Electric Conduit” logo
and other related information as per EO-4379.
15.0
PRIVATE STREETS ON PRIVATE PROPERTY
15.1
Private property in this specification means developments with private
streets where the residences are individually owned, such as:
Subdivisions with individual residences located on separate lots fronting
on mapped roads, Condominiums with individual residential units
surrounded by common areas with private access roads, Town Houses
with front and rear yards (plus side yards for end units fronting on private
roads, Cluster zoning with private roads and large open spaces held by
homeowner’s association.
15.2
For the above reasons, in privately owned developments of this type
where the Company has elected to install its facilities, the following shall
be established:
15.2.1 In New York city a line, 10 feet to 15 feet from the curb line on
each side of the roadway, and parallel to the roadway,
driveways and parking areas shall be called the “Property Line”.
The dimensions of 10 feet to 15 feet depend upon width of the
roadway. All Company facilities shall be installed between the
curb and the property line. In Westchester County property line
can be farther from the curb depending upon municipality.
15.2.2 All requirements in this specification, as they apply to public
streets, shall also apply to private streets.
15.3
Extensions – All extensions into such development, that are not along
roadways, shall be picked up and extended by the property owner from
the easement line into the development for distribution. However, this
policy shall not contradict any PSC rules for services and extensions for
the new residential customers.
15.4
The Company shall supply secondary cables, for residential customers
in accordance with EO-2055.
15.5
Easements – The Company shall obtain a non-exclusive easement from
the builder or corporation or any other owner of the property in the
development along whose private roads the Company elects to install its
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
facilities. This easement is recorded in county clerk’s office. The builder
or corporation or any other owner of the development must provide all
line and grade stakes. The Company employees shall have access to
such easement for the purpose of work related Jobs. This easement
shall run with the land.
16.0
SEPTIC TANK AREAS
Septic tank areas as referred to in this specification, are defined as areas
where the chemical action resulting from septic seepage affects the Company
cables.
17.0
REFERENCES
17.1
New York State Industrial Code Rule 753.
17.2
The following specification are listed for reference purposes:
Spec No.
Title
Filed In
EO-1100
Sealing of Service Ducts, Entrance and
Bus Openings in Electrical Distribution
Structures
Manual No. 3
EO-1181
General Specification for Backfilling of
Trench and Small Openings
Manual No. 3
EO-1136
General Requirements for use of conduit
system in URD Developments
Manual No. 4
EO-2055
A.C. Services
Manual No. 4
EO-4041
Operation of System Using URD TTaps, Disconnects and In-line Jumper
Modules
Manual No. 3
EO-6228
Tagging and Identification of URD and
Mini-pad Transformer Installations
Manual No. 3
EO-8085
General Backfill and Bedding Material
for Excavations
Manual No. 6
G-8100
General Specification of Installation of
Gas Services
Construction
Stds. (Gas)
G-8005
General Specification for the Installation
of Gas Distribution Mains
Construction
Stds. (Gas)
CONSTRUCTION STANDARDS
MANUAL NO. 3
17.3
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EO-6224 REVISION 10
DECEMBER 2005
The following drawings are listed for reference purposes:
Spec No.
Title
Filed In
305043
Rectangular Splice Box for URD
System
Manual No. 3
309495
Trench excavations for steel gas mains
up to 350 P.S.I.G.
Construction
Stds. (Gas)
EO-12833-A
Installation of Enclosures and Cables
for Residential Subsurface Transformer
Manual No. 3
EO-14505-D
URD Warning Tag
Manual No. 3
EO-15351-A
Installation of Box Pad, Splice Box and
Cables for Mini-Padmounted
Transformer (URD)
Manual No. 3
EO-16026-B
Adjustable Splice Box for URD System
Manual No. 3
EO-16348-A
Typical Installation for Mini-Padmounted Manual No. 3
Transformer
Signature on File___________
Leeman Hong
Acting Section Manager,
Non-Network Systems Section
Distribution Engineering Department
S. Parasher/Luis Ortega
Attachments: Figures 1 though 8
REVISION 10
FILE
This specification supersedes EO-1066. This
specification has been revised to comply with
NESC 2002 and to include reference to
National Arbor Day Foundation. Changed
depths & width of trench from minimum to
maximum values. Changed paragraphs 5.1,
5.2 and 5.3. Added note following paragraph
4.0. Added paragraphs 10.8 and 13.2.
Added Manual No. 24. Made other changes
as marked by gray bar. Scheduled spec.
review by 2010.
Construction Standards Manual No. 3,
Section 16: URD
Field Manual No. 22, URD,
Section 2: Cables
Field Manual No. 24, URD, Section 2:
Cables
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005
CONSTRUCTION STANDARDS
MANUAL NO. 3
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EO-6224 REVISION 10
DECEMBER 2005