Specifications and Installation Guide
for Underground Service to
Residential Developments
June 2010
Western Massachusetts
Electric
TABLE OF CONTENTS
I.
Scope………………………........................................................4
II.
General Requirements…………………………………...........4
a. Plans…………………………………………………………..4, 5
b. Code Compliance……………………………………….....5
c. Environmental Permits………………………………….5
d. Customer Payment………………………………………..5
III.
Division Responsibility
a. The Customer………………………………………………..5
b. WMECO will……………………………………………….....6
IV. Construction Schedule…………………………………............6
V.
Construction Requirements
a. Layout and Grading…………………………………..........6
b. Trenching……………………………………………………...6, 7
c. Backfilling……………………………………………………..7
VI.
Inspection…………………………………………………………...7
VII. Conduit/Installation……………………………………………...8
VIII. Single-Phase mounted Transformer Vault………………..9
IX.
Secondary Vault (Hand hole)……………………………….....9, 10
X.
Riser Pole…………………………………………………………...10
XI.
Services……………………………………………………………...10
XII.
Street lighting……………………………………………………...10
XIII. Other Utilities……………………………………………………...10
Appendices………………………………………………………………….11
Reviewed and Updated June 2010
2
Required Lead Times
The following lead times should be adhered to in order to facilitate timely completion of your
proposed project
Design lead time: 8 weeks
After the Company receives all required
materials (town approved plot plan, loads, easement
information, street light layout, etc.)
Inspection:
This is the time required to schedule a
company inspector to check the construction.
In no case shall any trench, conduit, silos
vaults or other parts of the conduit
distribution system be backfilled prior to the
Company inspector’s approval.
3 working days
Installation of WMECO equipment will be scheduled when all requirements have been met.
Note: Any changes during engineering or construction, will affect the agreed upon
installation schedule and the revised project completion date must be communicated
in a timely manner.
3
Requirements and Division of Responsibilities between the
Customer and Western Massachusetts Electric Company
For
Underground Residential Distribution Systems
I.
Scope
a.
b.
c.
II.
This document has been prepared as a guide in the installation of
Underground Residential Distribution conduit systems within residential
developments.
The terms of the Western Massachusetts Electric Company’s New Business
Policy NB-21M (Electrical Distribution to New Residential Developments)
apply and are incorporated in this document.
The Company reserves the right to modify or amend this document and its
specifications as it deems necessary.
General Requirements
a.
Plans and documents must be submitted along with name, address and phone
number for:
 Developer
 Surveyor (creating easement maps)
 Attorney (recording easement)
The customer will provide, in advance and at no cost to the Company, the
following:






Town approved site plan. The company cannot begin design
work prior to receipt of this plan.
A minimum of two copies of the approved Planning and
Zoning development map showing property lines only, total
number of house lots proposed, their locations and footprint,
lot numbers and associated 911 address numbers.
One set of detailed development plans showing proposed
location and footprint of houses, driveways, septic systems,
water lines, gas lines, sewers, etc.
A copy of all permits and approvals that have been obtained
for constructing the development.
Easements (in accordance of appendix a) for all facilities
required to serve the residential development.
A copy of a street light proposal for the development,
approved by the municipality, or written notice from the
municipality that street lighting will not be required; if
installation is requested after construction is complete,
additional costs, including the Company’s tax liabilities, may
be borne by the municipality and /or Customer if the tariff
does not collect all costs of construction.
4


b.
A schedule of Customer’s best estimate for the timeframe of
construction of homes in the development.
Such other reasonable information that may be deemed
necessary for our design of the project.
Code Compliance
All construction must be in accordance with the Company’s Construction
Standards, WMECO Information and Requirements for Electric Supply Below
600 Volts booklet as published by the Company, the Company’s New Business
Policy NB-21M, and shall comply with all applicable codes and requirements.
c.
Environmental Permits
The Customer will obtain any required environmental permits prior to the
start of construction. In addition the customer will certify to the Company,
that work areas in which the Company is to perform installation or
maintenance, are free of preexisting contamination by hazardous wastes or
materials as defined in the Massachusetts General Laws, Chapter 21E, and
will indemnify the Company for any claims, costs, expenses, suits, demands,
citations, fines or damages of any kind arising form the presence of any such
contamination.
d.
Customer Payment
Materials will not be ordered and the WMECO portion of the construction
project shall not begin until after the Customer makes all required payments.
III.
Division of Responsibility
a.
The Customer, at no cost to the Company, shall:






Prior to the start of the Company’s construction, provide all applicable
documents required by the Company including easements.
Install conduit for Company-owned street lights.
Provide and install all other required foundations, transformer pads,
hand holes, vaults, grounding systems, and conduit including glue,
warning tape, 1/4” diameter nylon pull line and conduit plugs, etc., as
indicated on the Company’s plan and related construction documents.
Supply Company-approved equipment only; equipment that is not
approved shall not be used without the prior written consent of the
Company.
Install all primary, secondary and service conduits, from the proposed
Company equipment locations, to each meter location or temporary
dead-end as designated by the Company.
Ownership and responsibility of the primary and secondary conduit
system will revert to the Company upon inspection and acceptance of
the conduit system by the Company. Ownership and responsibility of
the service conduit reverts to the future home owner.
5
b.
WMECO will:







IV.
Construction Schedule
a.
b.
V.
Develop the conduit plan to provide underground electric service.
Furnish a list of materials, approved manufacturers and their
equipment part numbers, to be supplied by the Customer.
Designate the location of all Company owned equipment and service
entrance and meter location(s).
Provide Company owned street light foundations as applicable for
street light installations.
Provide, install, own and maintain all transformers, Company owned
street lights, primary and secondary cable, and services up to meter.
Make all connections to Company equipment.
Inspect the underground conduit system and equipment foundations
installed by the Customer, prior to backfilling.
The Company may, at its discretion, construct the distribution line in
segments, rather than all at once.
The roadway binder coat shall be installed prior to the start of installation of
company facilities.
Construction Requirements
a.
Layout and Grading
Final grades shall be established with easement boundaries, street, lot, and
trench lines staked by the Customer before any trenching is started
b.
Trenching
The Customer shall adhere to the Company’s construction plan specifying
trench locations, conduit depths and requirements specified in DTR 50.103 and
DSEM 07.821, enclosed. Any changes are subject to approval by the Company.



Trench location shall be in as direct a line as possible, without
reverse bends, between distribution facilities and from the
distribution facility to the customer service entrance.
In order to minimize cable-pulling forces, no more than two sweeps
(not including riser at house or pole) exceeding a total change in
direction of 45 degrees shall be permitted.
Minimum burial depths specified for all electric conduits shall be
maintained during all phases of construction. Any temporary
mechanical protection required over buried conduit to prevent
crushing or damage due to unusually heavy construction equipment
shall be the responsibility of the Customer.
6



c.
The trench bottom shall be solid and relatively smooth, or
undisturbed earth, well tamped, and free of any debris that may be
detrimental to the conduit. Excavation shall be of a size and extent
to permit proper installation of conduit and structures, as required.
Where excavation is in rock, it shall be removed to 4 inches below
the trench bottom. The over excavation shall be replaced with a
bedding of gravel, sand or clean well tamped backfill.
Any conditions not suitable for a stable foundation shall be reported
to the Company Representative for recommendation.
Backfilling
The Company’s representative shall be notified in advance of backfilling of any
electric facility, i.e., conduit, vault, handhole, grounding, etc.
If any facility is backfilled without the Company’s prior approval, the
Company reserves the right to require re-excavation of the facility.




VI.
Backfill shall not contain ashes, cinders, shell, frozen material, loose
debris or stones larger than 2 inches in maximum dimension. All
backfill shall be compacted.
Trenches shall be immediately backfilled following conduit system
inspection and approval by the authorized Company representative.
Backfilling shall be accomplished in a continuous manner from one
structure to the next, and shall not be placed over any open-ended
(unplugged) conduits.
Company approved red cable marking or “caution” tape shall be
installed in the trench twelve inches above and directly over the
conduit.
Inspection
a.
The Company’s representative shall be responsible for the inspection of the
conduit system being prepared and installed by the Customer, at various
stages of installation.
b.
The inspection shall include, but not be limited to the following:








All trenches and excavations.
All material supplied by the Customer.
All backfill material during or after installation as applicable.
All vaults, handholes, grounding and other facilities, after setting in place,
but prior to backfilling.
All conduit installations, including cemented joints, bends, sweeps, bellends, pull line and conduit plugs, prior to backfilling.
All conduit terminations at transformer structures, handholes, switch
locations, riser poles and other applicable locations.
All backfilling operations around structures and conduit runs.
Customer shall ensure conduits are free of any obstructions and debris.
7
VII.
Conduit / Installation
a. Conduit shall be installed in accordance with Company Standards and
Construction Plans which accompany this specification package. Refer to
DSEM 07.821 and 07.822 which cover general requirements for conduit
installation.
b. Standard conduit shall be minimum 3 inch diameter, rigid PVC, heavy wall,
sunlight resistant (6% - 7% titanium dioxide by weight), listed and labeled
electrical grade schedule 40 as per NEMA TC2-1990.
c. Sweeps used at house or pole risers shall have a minimum radius of 24 inches,
with 36 inches preferred. Minimum 48-inch radius sweeps are required
within the conduit run.
d. Reverse bends shall not be allowed within the conduit run.
e. Conduit shall enter concrete vault perpendicular to the knockout. If this is not
practicable contractors shall provide 22-1/2 or 45-degree schedule 40 PVC
bend.
f.
Conduit in the trench should have a 4 inch per 100 feet downward pitch
toward the distribution facility, if physically possible, to provide drainage away
from the service entrance, and prevent stagnant water from collecting in ducts.
g. Install conduit with all joints cemented, through knockout and extend 3 inches
inside concrete hand hole. Terminate conduit run with end bell and
permanently mark conduit destination on conduit end.
h. Install ¼” diameter nylon pull line, including 10 feet of slack, in each duct and
secure to conduit plugs at each end. Gaps around conduit in hand hole
knockout openings shall be sealed with mortar to prevent backfill from
entering distribution facilities.
i.
Minimum separation between electrical conduit and other utilities in the
trench shall be as indicated in DTR 50.103.
j.
Conduit shall have 30-inch minimum burial depth, top of conduit to finished
grade, for both primary and secondary voltages. Main electric trenches
shall maintain conduit depths as shown in DTR 50.103.
k. In the event proper depth of conduit cannot be achieved, or where foreign
objects threaten to interfere with the installation of conduit, the Company’s
representative may require steel conduit or concrete encasement of the
conduit.
l.
Unique conditions will be addressed in the Company construction plan.
m. Parallel installation of any conduits and other facilities directly above
electrical system conduits are prohibited.
8
VIII. Single-Phase Padmounted Transformer Vault
a. Padmounted transformer vault structures shall be located no further than 10
feet from a driveable, paved surface.
b. All vaults shall be level and installed in accordance with DTR 58.185.
c. A minimum of six inches base course of crushed stone (3/4 inch max. stone
size) or free-draining gravel shall be placed under all transformer vault
excavations and shall be thoroughly compacted using a vibratory compactor.
Certain soil conditions may require removal below normal depth and
subsequent additional clean fill or stone added and compacted to insure sound
base course for transformer vault.
d. Transformer vault pad /slab tops shall be three inches above final grade. In no
instance shall final grades hamper proper access or operation of Company
distribution equipment.
e. Install two 5/8” X 8’ galvanized steel ground rods spaced a minimum 8’ apart
in the trench adjacent to the vault. Do not install the ground rods inside or
underneath the concrete vault. Leave a 10-foot coil of #6(minimum) bare solid
copper ground wire for connection to the transformer. Telephone and cable
company bond wires shall be provided and tied to Company ground rods with
Company-approved connectors as shown in the enclosed Material. Refer to
Figures 8, 9 and 10. Such bonding or connection shall not interfere with
connecting Company equipment.
f.
A hill holder as shown in DTR 50.341 shall be installed where slopes exist that
would undermine or cover equipment (i.e., transformers) due to sharp drop-off
or rise of grade. A customer designed retaining wall may also be considered as
an alternative in such cases.
NOTE: The Company shall require that equipment easements on private
property be reasonably level. Also, all retaining walls shall fall
outside of equipment easements and in no case shall they hamper
door openings, safe operation (see DSEM 07.822) or placement of such
equipment. Retaining wall design shall be approved by the Company.
g. Transformer vault shall be completely backfilled prior to commencing any
cable pulling.
IX.
Secondary Vault (Hand hole)
a. Vaults shall be installed in accordance with details shown in DTR 54.201 or
DTR 54.203.
b. Vaults shall be installed such that their covers will be flush with or slightly
above finish grade. In no case shall final grade cover or hamper access to the
handhole covers.
9
c. A minimum of six inches base course of crushed stone (3/4 inch. max. stone
size) or free-draining gravel shall be placed under all vault excavations and
shall be thoroughly compacted using a vibratory compactor. Certain soil
conditions may require excavation below normal depth. Additional clean fill or
stone must be added and compacted to ensure a solid base course for the vault.
d. Vaults shall only be placed within equipment easements. They shall not be
placed within the sidewalk area or within the traveled way.
e. Covers shall be secured to all vaults immediately upon completion of their
installation and backfilling.
X.
Riser Pole
a. The Company shall designate conduit riser locations on the pole(s). Riser pole
details shall be in accordance with DTR 12.057 and Figure 13.
b. All spare riser bends shall be terminated in a coupling and plugged or capped,
above ground at the pole base.
c. 90 bends at a riser pole shall be galvanized steel. All steel riser bends shall
be grounded in accordance with Company requirements, as shown in Figure
13.
XI.
Services
a. All services shall be single-phase, three-wire, 120/240 volts nominal.
Reference shall be made to the WMECO Information & Requirements for
Electric Supply Below 600 Volts booklet.
b. Provisions for future services shall be installed as shown in DTR 54.203 and
the attached related figures.
XII.
Street lighting
Conventional street lighting shall be installed in accordance with WMECO
design specifications and located where indicated on construction plans.
Contact a Company representative for Premium Decorative or other street
lighting options.
XIII. Other Utilities
Conduit, terminal enclosures or other structures belonging to other utilities
shall be located so they do not interfere with electrical installations nor impede
the operation or maintenance of electrical facilities. Refer to DSEM 07.822 for
a sketch indicating the acceptable zone(s) for installation of above-ground
facilities belonging to other utilities.
10
Appendices
Easement Procedure for Subdivisions
Conduit System Checklist
Material Specifications/Supplier Matrix
Approved Manufactures of Other related equipment
Matrix Construction
Construction Pictures
Detailed Underground/DB Construction Specifications
11
APPENDICES
Easement Procedure for Subdivision
The owner of a subdivision must provide a fully executed Utility Easement to
WMECO specifications prior to the installation of any WMECO facilities.
The following information is required to process the Utility Easement:







Property owner’s name and address.
Attorney’s name and address.
Surveyor’s name and address.
Subdivision name and address.
Two copies of the approved subdivision plan.
Property deed and plan book and page information.
Mortgage holder name and address.
The Utility Easement area will include the proposed public way in its entirety, plus
an additional ten (10) foot wide area along all lot frontages adjacent to the proposed
public way. Any exceptions to this format will require approval of the WMECO fieldengineering technician and real estate agent.
The subdivision owner or his attorney, working in conjunction with WMECO’s Real
Estate Agent, must provide the easement document, a recordable plan showing the
proposed utility easement area, subordination of mortgage holder, authorized
signatures and notarization and recording of all documents.
The completed Utility Easement and plan will be submitted to WMECO’s Real Estate
Agent for review prior to recording of the document.
Upon acceptance, the WMECO Real Estate Agent will notify the attorney to record
the utility easement and associated plan, providing a copy of the recording
information to WMECO’s Real Estate Agent.
12
SINGLE PHASE CONDUIT SYSTEM INSPECTION CHECKLIST
Do not backfill BEFORE conduit system inspection and approval by the Company. Every
item below must be inspected and checked off by a Company Representative. Any item found
unacceptable must be initialed and rectified by the Developer prior to next inspection.
N*
Y*
TRENCH / CONDUIT
Min. 30” depth from finished grade to top of primary and secondary conduit.
Min. 24” depth from finished grade to top of service conduit
Conduit minimum size 3” diameter Schedule 40 PVC, electrical grade.
Min. 18” clearance in all directions between electric conduits and adjacent water, sewer,
fuel, (oil or gas) lines, and building foundations.
1/4-inch diameter nylon pull line, including 10 ft. of slack, installed and secured in conduit
with conduit plugs at both ends.
Clean backfill (with less than 2” stones) on-site for backfilling entire trench, (inspector may
witness backfilling).
Caution Tape – spot check.
Conduit run conforms to layout in construction plan.
No parallel conduits or other facilities directly above electrical system conduits.
SECONDARY VAULT (HANDHOLE)
6” of crushed stone or compacted free draining gravel under vault.
Vault is level.
Covers installed and properly secured.
Conduit plugs with ¼” diameter nylon pull line installed in all conduit ends.
3” of conduit extended into vault and properly labeled.
Gaps around conduit at knockouts sealed with cement mortar.
Correct orientation to road and lot lines.
TRANSFORMER VAULT
6” crushed stone or compacted free-draining gravel under transformer vault.
Vault is level.
Top of pad surface 3” above final grade.
3” of conduit extended into vault and properly labeled.
Pulling eyes properly secured in place.
Conduit plugs with ¼” diameter nylon pull line installed in all conduit ends.
Two ground rods installed with #6 bare cu. ground wire, spaced a minimum 8 feet apart.
Bond wires provided for Telephone and Cable companies – 10’ minimum.
Gaps around conduit at knockouts sealed with cement mortar.
RISER POLE
90 degree galvanized steel bend installed as specified.
Bend capped and secured to pole with pipe strap.
Steel-PVC adapter and steel sweep not encased in concrete.
Ground clamp and 6’ ground conductor installed.
Conduit riser located on field side of pole opposite direction of traffic.
Riser path clear to top of pole.
*NOTE:
Y – Acceptable;
N – Deficient
13
Advance Materials, Inc.
11 Colton Road
East Lyme, CT 06333
(860) 691-8350
Arrow Concrete Products,
Inc.
539 Oronoque Road
Milford, CT 06460
(203) 301-5091 or at
560 Salmon Brook Street
Granby, CT 06035
(860) 653-5063
21
Atlas Concrete Products,
Inc.
575 Wallingford Road
Durham, CT 06422
(860) 349-1751
Connecticut Precast
Corporation
555 Fan Hill Road
Monroe, CT 06468
(203) 268-8688
Cromwell Concrete
Products, Inc.
667 Main Street
Cromwell, CT 06416
(860) 529-3417
Eastern Precast
Route 133
Brookfield, CT 06805
(203) 775-9380
Jolley Precast, Inc.
463 Putnam Road
Danielson, CT 06239
(860) 774-9066
Oldcastle Precast
151 Old Farms Road
Avon, CT 06001
(860) 673-3291
United Concrete Products,
Inc.
173 Church Street
Yalesville, CT 06492
(203) 269-3119
SPC C-710
42" FG Cover
SPC E-953
Extension for HH 36'x4"
SPC E-946
Extension-HH Hex 36"x4"
SPC P-015-016
76"x70"x36" Pad 500 & >
SPC P-013-014
76"x54"x36" Pad 75-300
SPC P-010
Pad Plug for XFMR Pad
SPC P-009
42"x48"x4" Pad - XFMR
SPC P-017
48"x48"x4" Pad - FG Enc
SPC H-019
60"x56" Hex Handhole
NU-Approved Precast
Suppliers
SPC H-020
36" Round HH
NU Material Specification
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
14
NU-Approved Manufacturers of Other Related Equipment
Cover, Handhole, Hexagon/Round, 42” Dia., Fiberglass (SPC C-710)(SC 0174819)
Advanced Materials Inc.
Holbeck
Nordic
(AM-42)
By desc.
(NDC-42)
Extension, Hexagonal Handhole, Precast, 36” Dia. x 4” High (SPC E-946)(SC 0174901)
Concast
(HE-44)
United Concrete Products, Inc. (By Desc)
Extension, Vault, Precast, 180-Deg. Section-36” Dia. x 4” H (SPC E-953)(SC0174870)
Concast
(HE-42)
United Concrete Products, Inc. (by Desc)
Extension, Handhole, Lawn
Fargo
PENCELL
(B-120TK) (SC 0174875)
(PE-20-5) (SC 0174876)
Ground Rods (SC 0175362)
Carolina
Chance
Galvan
Joslyn
(By Desc)
(8578)
(GR6258)
(J5328)
Ground Connector (SC 0178957)
Blackburn
Burndy
Dossert
(JAB58H)
(GRC58)
(GN62)
Conduit Plugs,
3-inch
Electrical Materials
Joslyn
O-Z
Southport
(J8492)
(GRC-62-10B)
(GC31)
4-inch
(COND PL3)
(COND PL4)
(SC 0434785)
(SC 0434786)
Handhole, Lawn, Plastic (SC 0174991)
PEN-CELL
Carson
(PE-30HDX-EWB)
(1730183HGE20AUO)
Handhole, Sidewalk, Polymer Concrete (SC 0174994)
CDR
Quazite
Highline
(PA12-1730-18)
(PG1730BA18/HA17)
(CHA173018HE1)
Handhole, Streetlight (SC 0174953)
PEN-CELL
(PE-10X)
Hill Holder – (SC 0183406 – 16”, SC 0183407 – 32”, SC 0183409 – 20”)
Nordic
(NHH-16-46-52) 16” back height
(NHH-20-54-52) 20” back height
(NHH-32-46-52) 32” back height
15
NU and Customer / Contractor Responsibilities
NU
ITEM
HIGH VOLTAGE PRIMARY SYSTEM
Trench / Backfill
Conduit
¼-Inch Diameter Nylon Pull Line
Marking Tape (Red, Warning)
Transformer Box Pads
Switch Foundations
Handholes / Splice Boxes
Primary Cable
Switching Devices
Terminations
Ground System per NU Standards
LOW VOLT. SECONDARY SYSTEM
Trench / Backfill
Conduit
¼-Inch Diameter Nylon Pull Line
Marking Tape (Red, Warning)
Handholes / Splice Boxes / Pedestals
Secondary Cable / Wire
Connectors
Ground System per NU Standards
CUSTOMER SERVICE LATERAL
Trench / Backfill
Conduit
Service Conductors (to distribution facilities)
Connectors (at transformer or secondary HH)
Meter Socket (Manual Bypass Type)
Ground System per NU Standards
TRANSFORMERS
Conventional
Padmount
STREET LIGHTING
Trench / Backfill
Conduit
Bases
Marking Tape (Red, Warning)
MISCELLANEOUS
Easement (granting of)
Easement drawings / documents
Environmental Permits / Releases
Contribution in Aid of Construction Payment
As-built drawings
STATE OF MASSACHUSETTS REQUIREMENT
Call DIG SAFE AT 1-888-344-7233
Provides
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Installs
CONTRACTOR
Provides
Installs
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16
17
1/4” Pull Line
(In All Conduits)
Duct Plug
(In All Conduits)
Conduit To Protrude
3” into Silo Opening
Mark Destinations
on Conduit and Silo
Pulling EyeCheck TightnessDo Not Remove
Lot 1
note: Silo to be set on
6” of Stone
Lot 2
Grout Must Be Used To
Seal Opening
Typical Secondary
Vault Interior
(Figure 1)
18
45 degree or
22.5 degree
Bend
us e
o
eH
r
u
ut
F
To
Property Line
Tel or CATV
Tel or
CATV
Area
Min.
24”
Clearance
Rear View of a Typical
Secondary Vault
(Figure 2)
Grout Fill
Tel or
CATV
Tel or CATV
Area
note:
Silo to be set on
6” of Stone
To Future
House
Minimum
of 24”
Clearance
Road
note: All Conduit to be
3” PVC, Schedule 40
19
Typical
Secondary
Vault Layout
(Figure 3)
note: All Conduit to be
3” PVC
Schedule 40
42”
Fiberglass Cover
Tel or CATV
Silo to be set on
6” of Stone
Plug
note: (in all conduits)
Tel or CATV
Enclosure Area
for
Tel or
CATV
Limit of Easement
Road
Secondary from
Transformer Vault
Clearance
ce
45 or
i
rv
e
22.5
S
e
Degree ous Minimum
Bends H
24”
¼” Line
(in all conduits)
Ho
us
eS
erv
Enclosure Area
ice
for
24”
Tel or
Min.
CATV
Property Line
Typical
Secondary
Vault Layout
(Figure 4)
Tel or CATV
Silo to be set on
6” of Stone
Minimum
24” Clearance
Enclosure Area
for Tel or
CATV
Service Stub
Minimum
24” Clearance
Enclosure Area
for Tel or
CATV
Limit of Easement
Secondary from
Transformer Vault Roa
d
Tel or CATV
House Service
lot # to be written in
Permanent Marker
Property Line
Grout Fill
45 or 22.5
Degree
Bends
House Service
note: all conduit to be
3” PVC
Service Stub
Schedule 40
lot # to be written in
Permanent Marker
10’ Service Stub
From Secondary
Vault
1/4” Pull Line
Typical Service Stub
(Figure 5)
Service Stub
note: All Conduit to
be
3” PVC
Schedule 40 Conduit Plug
Typical Transformer
Vault Interior (Figure 6)
Mark Destinations
on Silo and Conduit
Removable
Conduit Plug
In All Conduits
Grout Must Be Used
10’--#6 cu To Seal Opening
Ground Wire
Enter Under Silo
note:
Silo to be set on
6” of Stone
Conduit To Protrude
3” max into Silo Opening
y
ar
m
i
Pr rom
F ole
P
c.
Se o
T 0A
74
H
H
Pulling EyeCheck TightnessDo Not Remove
Pulling EyeCheck TightnessDo Not Remove
1/4” Pull Line
To 740
H
H
22
23
Mark Destinations
on Silo and Conduit
note: Install Removable
Plugs and Pull Lines
In All Conduits
Grout Must Be Used
To Seal Opening
Typical
Transformer
(or Switch)
Vault Interior
(Figure 7)
Conduit To Protrude
3” max into Silo Opening
Prim
ar
pad y to
742
10’--#6 cu Ground Wire
Coil Entering From
Underneath Vault
Sec. to
HH 740A
Pulling EyeCheck TightnessDo Not Remove
note: all conduit to be
3” PVC
Schedule 40
8’ Ground Rod
(driven in the trench)
Road
8’ min. apart
#6 Cu Ground
Wire Entering
Under Silo
Grout Fill
Enclosure Area
for Tel or
CATV
6’-#6 cu
Ground Wire
Coil
House
Service
Service Stub
lot # to be written in
Permanent Marker
Secondary to
Road Crossing
10’
10’ coilcoil-#6 Cu Ground Wire
Entering Under Silo
Typical
Transformer
& Service Vault
(Figure 8)
To Secondary
8’ Ground Rod Vault
(driven in the trench)
Primary to Transformer
Minimum
30” Clearance
1 ft.
Transformer
Vault
Service
Vault
note:
Silos set on
6” of Stone
10’
10’ coilcoil-
Vault
rom Pole
to Secondary
Primary f
6’-#6 cu Ground Wire Coil
Enclosure Area
for Tel or
CATV
Easement
Duct Plug &
1/4” Pull Line
Service Stub
House
Service
Property Line
Te
l
o
rC
A
TV
lot # to be written in
Permanent Marker
TV
A
rC
o
l
Te
30”
Min.
8’ Ground Rod
driven in the trench
Silo set on
6” of Stone
Pole
Primary from
lt
to Secondary Vau
6’
Coil
Tel or CATV
Area
Sec.
1/4” Pull Line
in all conduits
CATV
Tel or
CATV
Secondary to
Road
Crossing
10’--#6 cu
Ground Wire
Coil From
Underneath
Tel or
CATV
6’
Coil
Tel or
CATV
area
All Conduit
3” PVC
Schedule 40
8’ Ground Rod
driven in the trench
Pri. to XFMR
lt
to Secondary Vau
30”
1’ Long Minimum
Removable
Conduit Plug
In All Conduits
To
Secondary
Vault
Tel or
Transformer (or Switch)
Vault Layout (Figure 9)
25
H
ou
se
Se
rv
ic
e
Property Line
Ho
us
eS
e rv
ice
Easement
45 or 22.5
Degree
Bends
Typical Transformer &
Service Vault Layout
(Figure 10)
Secondary
Service
Vault
1/4”
1/4”
Pull Line
Secondary to
Service Vault
Plug
(all conduits)
Transformer
Vault
Tel or
CATV
Area
to Secondary Vault
1 ft.
30”
30”
Minimum
6’
Coil
30”
30”
Min.
Prim ary from pole
note:
All Conduit
3” PVC
Schedule 40
6’ - #6 cu
Ground Wire
Coil
Tel or
CATV Area
Sec
¼” Line
Plug
(all conduits)
10’--#6
--#6 cu
10’
Ground Wire
Coil Entering
Under Silo
V
AT
or C
T el
8’ Ground Rod
Driven In
The Trench
note:
Silos set on
6” of Stone
to Secondary Vault
Pr imary to Transformer
8’ Ground Rod
Driven In
The Trench
8’ min. apart
Secondary to
Road Crossing
26
27
Property
Line
Removable
Conduit Plug
(in all
conduits) 1/4”
Pull Line
Easement
Typical Secondary
Road Crossing
(Figure 11)
Transformer
(or Switch) Vault
Ground Rod (Figure 12)
Single Run
Passing Through
The Clamp
Clamp
#6 Copper
Ground Wire
10’ Coil Inside
Silo, Entering
From Underneath
note:
All Conduit
3” PVC
Schedule 40
Tel or CATV
note:
Silo set on
6” of Stone
Grout Must Be Used
To Seal Openings
Check Tightness-Do Not Remove
8’ Ground Rod
Driven In The Trench
ol e
ault
P
V
y
m
fro
ndar
y
o
r
c
a
e
to S
Prim
Service
6’ Coil - #6
Copper
for
Tel or CATV Tel or CATV
Ground
House
28
Tel & CATV
Actual Final Grade Level
1/4” Pull Line
Typical Riser
Grounded
Steel Sweep
(Figure 13)
Steel Sweep
2 ft. Minimum Radius
Steel Sweep
Ground Clamp
A
Pole
CATV
&
Tel
WMECO
Pole Down Ground
Clamp
Road
30 deg.
Electric
12”
minimum
Conduit
8’ Ground Rod
Copper
Plug
Driven In The Trench
Ground Wire
A
Detail
AA
R
o
ad
Primary
or Second
ary
29
Typical
Road Crossing
Layout
(Figure 14)
For Specific
Information
Details
See Figure 10
Road
For Specific
Information
Details
See figure 11
30
Padmount Transformer
(Figure 15)
Underground/DB Design
Section 07.82
Single - Phase DB in Conduit
07.821
SCOPE - This Standard covers the general requirements for electric utility installation of single - phase
direct - buried cables in conduit.
GENERAL - The preferred method of providing electrical service is installation of direct - buried electrical cables in
conduit. All installations of electrical cables in conduit shall adhere to the 1997 NESC (National Electrical Safety
Code), in addition to the following requirements:
1. TRENCH - Trench location shall be in as direct a line as possible without reverse bends between distribution
facilities and from the distribution facility to the customer service entrance. In order to minimize cable pulling
forces, no more than two bends (not including riser at house or pole) exceeding a total change of 45 degrees
shall be permitted.
a. The trench bottom shall be undisturbed or relatively smooth earth, well tamped, and free of any debris
that may be detrimental to the conduit. Excavation shall be of a size and extent to permit proper
installation of conduit and structures as required.
1) Where excavation is in rock, it shall be removed to 4 inches below the trench bottom. The over
excavation shall be replaced with a bedding of gravel, sand or clean, well tamped backfill.
2) Backfill shall not contain ashes, cinders, shells, frozen material, loose debris, or stones larger than
2 inches in maximum dimension. Backfill shall be compacted.
b. Conduit in the trench should have a 4 inch per 100 feet downward pitch toward the distribution facility,
if physically possible. (This provides drainage away from service entrance, prevents stagnant water
in duct.)
c. Trench shall be of such depth to accommodate 30 inches minimum cover for primary and secondary
cables in conduit installed along the roadway easement, and 24 inches minimum cover for secondary or
service cables in conduit on private property.
2. CONDUIT - Standard conduit shall be minimum 3 - inch diameter, rigid PVC, heavy wall, sunlight resistant
(6% - 7% titanium dioxide by weight), Schedule 40 as per NEMA TC2 - 1990.
a. Limit the number of electric utility conduits to a maximum of four per trench.
b. Install conduit, with all joints cemented, through knockout and extend 4 inches inside handhole.
Terminate conduit run with end bell (e.g., SC 0177110 for 3 - inch diameter). Conduit destination shall be
permanently marked on conduit end.
c. Gaps around conduit at knockout openings shall be sealed with cement mortar to prevent backfill
entering the handhole.
d. A 1/4 - inch - diameter nylon pull line shall be installed in each duct, including 10 feet of slack, and secured
to conduit plug. Each end of the conduit shall be sealed with a conduit plug (e.g., SC 0175141 for 3 - inch
diameter), and left accessible.
e. Bends in the conduit run shall have a minimum radius of 48 inches. This requirement does not include
bends used at house or pole risers where the bend radius shall be a minimum of 24 inches, with
36 inches preferred.
3. PRIMARIES - For primary in conduit, a separate bare copper grounded neutral conductor and anodes are
not required.
a. Install primary in conduit at a minimum depth of 30 inches below finished grade.
Northeast Utilities
February 2003
Distribution System Engineering Manual
32
Underground/DB Design
Section 07.82
Single - Phase DB in Conduit
07.822
b. Because of grounding requirements, each section of primary in conduit is limited to a maximum of
750 feet when other utilities are in the trench. When the electric utility is sole occupant in the trench,
each section of primary in conduit is limited to a maximum length of 1700 feet. (Note: Length may be
limited to 1000 feet if district utilizes 1000 - foot emergency primary reel trailer.)
c. The Company reserves the right to limit runs where cable pulling forces exceed recommended maximums.
4. SECONDARIES and SERVICES - The Company reserves the right to limit services in conduit which require
a cable installation pulling force in excess of 2000 pounds.
a. Conduit for secondaries and services on private property shall be installed at a minimum depth of
24 inches below finished grade.
b. Secondaries or services in conduit, installed in the same trench as primaries or on public right - of - way,
shall be at a minimum depth of 30 inches below finished grade.
c. A clearance zone of 4′ wide x 3′ deep x 6′ high is
required at the customer end of the service. Keep
shrubs, debris, fences, and other structures clear of
this area. (Refer to sketch at right.)
6′
5. GROUNDING - Primaries shall be grounded at all
handholes, structures and enclosures.
2′
a. The grounding interval for primaries in the trench
with other utilities shall be not less than eight per mile.
2′
b. For primaries with sole occupancy in the trench, the
grounding interval shall be not less than four per mile.
3′
6. OTHER UTILITIES - Conduit, terminal enclosures, or structures belonging to other utilities shall be located
such as to not interfere with electrical installations nor impede the operation and maintenance of
electrical facilities.
a. The acceptable zone for installation of above - ground facilities belonging to other utilities is as shown below.
ÄÄÄ
ÄÄÄ
ÄÄÄ
FIELD SIDE
10′ EASEMENT
1′
ÄÄÄ
ÄÄÄ
ÄÄÄ
ÄÄÄÄ
ÄÄÄÄ
ÄÄÄÄ
1′
3′
ROAD SIDE
ÄÄÄÄ
ÄÄÄÄ
ÄÄÄÄ
ÄÄ
ÄÄ
3.5′
3′
3.5′
3 FT
3 FT
b. No shrubs, fences, or permanent structures can be placed
within 10 feet of the front and 3 feet of the sides and back of
pad - mounted transformers. The Company has the right to
remove these obstructions without notice to the owner. For
additional clearances see DTR 42.047 and DTR 42.061.
Northeast Utilities
February 2003
LEGEND:
Electric Company Pad or Vault
Acceptable Zone for Installation of
Above - Ground Facilities Belonging
to Other Utilities
10 FT
Distribution System Engineering Manual
33
See DSEM Section 07.82
for trench specifications
CABLE GRIP ATTACHMENT
NOTE 2
SECONDARY OR NEUTRAL
ATTACHMENT
2″ NOTE 1
SCHEDULE 40 PVC
36″ MAX
WARNING SIGN
SCHEDULE 80 PVC, UNLESS
SPECIFIED OTHERWISE
6′
NOTE 4
RISER POLE
A
A
FINISHED GRADE
CURB/EDGE OF
ROADWAY
SEE DTR 04.075
4″ MIN
GROUND CLAMP
90° STEEL BEND
(ELBOW)
TRAFFIC FLOW
#6 OR #4
COPPER WIRE
GROUND ROD
NOTE 3
A−A
MINIMUM 12″
Notes
1. Top of conduit to extend at least 2 inches above the neutral/secondary attachment.
2. Seal conduit from water entry at top of riser for services installed in conduit for the entire run. See DTR 12.010.
3. Steel conduit shall be grounded. If the steel elbow is installed in a nonmetallic conduit installation, it shall also be
grounded. Use 5/8″ x 8′ galvanized steel ground rod and ground clamp.
4. Preferred location for riser placement is on field side of pole opposite the direction of traffic. Check riser path for
obstructions, and coordinate with other utilites for placement of risers and any equipment. (Road side of pole
opposite the direction of traffic is reserved for road crossings.)
5. Contact the toll−free telephone number to locate buried cables before driving ground rods.
ORIGINAL
11/23/76
APPROVED
6/2/05
SECONDARY AND SERVICE RISERS − 600 VOLT CABLE
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 12.057
7
35
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| A
SINGLE PHASE 600V 1/0 AL 3CT RISER DB
|
DTR12.057.3A
|
| B
SINGLE PHASE 600V 1/0 AL 3CT RISER UG
|
DTR12.057.3B
|
| C
SINGLE PHASE 600V 1/0 AL 3CT RISER SVC
|
DTR12.057.3C
|
| D
SINGLE PHASE 600V 4/0 AL 3CT RISER DB
|
DTR12.057.3D
|
| E
SINGLE PHASE 600V 4/0 AL 3CT RISER UG
|
DTR12.057.3E
|
| F
SINGLE PHASE 600V 4/0 AL 3CT RISER SVC
|
DTR12.057.3F
|
| G
SINGLE PHASE 600V 350 AL 3CT RISER DB
|
DTR12.057.3G
|
| H
SINGLE PHASE 600V 350 AL 3CT RISER UG
|
DTR12.057.3H
|
| I
SINGLE PHASE 600V 350 AL 3CT RISER SVC
|
DTR12.057.3I
|
| J
THREE PHASE 600V 1/0 AL 4CT RISER DB
|
DTR12.057.3J
|
| K
THREE PHASE 600V 1/0 AL 4CT RISER UG
|
DTR12.057.3K
|
| L
THREE PHASE 600V 1/0 AL 4CT RISER SVC
|
DTR12.057.3L
|
| M
THREE PHASE 600V 4/0 AL 4CT RISER DB
|
DTR12.057.3M
|
|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
| 20| 20| 20| 20| 20| 20| 20| 20| 20| 20| 20| 20|FT| CONDUIT PVC SCH 40 3 IN X 10 FT 3.500 OD BELLED
|
M M017471100
|
|
| 10| 10| 10| 10| 10| 10| 10| 10| 10| 10| 10| 10|FT| CONDUIT PVC SCH 80 3 IN X 10 FT 2.900 ID BELLED
|
M M017458600
|
| 20|
|
|
|
|
|
|
|
|
|
|
|
|FT| CONDUIT PVC SCH 40 4 IN X 10 FT 4.500 OD BELLED
|
M M017471200
|
| 10|
|
|
|
|
|
|
|
|
|
|
|
|FT| CONDUIT PVC SCH 80 4 IN X 10 FT 3.826 ID BELLED
|
M M017458700
|
|
|
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| BUSHING CONDUIT PVC RED 3-2 INV
|
L M017448600
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| CLAMP GRND CPR F/4 SOL-2/0 STR 2 1/2 - 3 1/2 IN PIPE
|
L M017896400
|
|
1|
|
|
|
|
|
|
|
|
|
|
|
|EA| CLAMP GRND COND S/BRONZE 4 - 5 IN PIPE
|
L M017896500
|
|
|
1|
1|
|
1|
1|
|
1|
1|
|
1|
1|
|EA| CONNECTOR CABLE GROUNDING COPPER #8-1/0
|
L M017895700
|
|
|
1|
1|
|
1|
1|
|
1|
1|
|
1|
1|
|EA| ROD GROUND G 5/8 IN X 8 FT
|
L M017536200
|
| 14| 14| 14| 14| 14| 14| 14| 14| 14| 14| 14| 14| 14|EA| SCREW DRIVE 0.25 IN 2.5 IN LG GALVANIZED HEX HEAD
|
L M019016600
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| SIGN WARNING UG ELECTRIC CBL 2.5 IN X 2.5 IN F/COND RISERS |
L M019410700
|
|
1|
|
|
1|
|
|
1|
|
|
1|
|
|
1|EA| SIGN WARNING CBL ALIVE BY BACK FEED 4 IN X 7 IN
|
L M018455200
|
|
|
7|
7|
7|
7|
7|
7|
7|
7|
7|
7|
7|
7|EA| STRAP PIPE POLE 3 IN GS 1 IN W 2-1/4 IN H 15D
|
L M017667300
|
|
7|
|
|
|
|
|
|
|
|
|
|
|
|EA| STRAP PIPE POLE 4 IN GS 1 IN W 2 1/4 IN H 15DD
|
L M017667400
|
|
|
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| WEATHERHEAD FOR 2 IN PVC COND SERVICE ENTRANCE
|
L M018146700
|
|
|
1|
1|
|
1|
1|
|
1|
1|
|
1|
1|
1|LB| WIRE TIE BARE CU #6 SOLID
|
L M018034900
|
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR12.057.3A / M
| ORIGINAL ISSUE 11 / 23 / 76
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
02 / 01 / 05
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
36
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| N
THREE PHASE 600V 4/0 AL 4CT RISER UG
|
DTR12.057.3N
|
| O
THREE PHASE 600V 4/0 AL 4CT RISER SVC
|
DTR12.057.3O
|
| P
THREE PHASE 600V 350 AL 4CT RISER DB
|
DTR12.057.3P
|
| Q
THREE PHASE 600V 350 AL 4CT RISER UG
|
DTR12.057.3Q
|
| R
THREE PHASE 600V 350 AL 4CT RISER SVC
|
DTR12.057.3R
|
|
|
|
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|
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|
|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| Z | Y | X | W | V | U | T | S | R | Q | P | O | N |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
|
|
|
|
|
|
|
|
|
|
|
|
|FT| CONDUIT PVC SCH 40 3 IN X 10 FT 3.500 OD BELLED
|
M M017471100
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|FT| CONDUIT PVC SCH 80 3 IN X 10 FT 2.900 ID BELLED
|
M M017458600
|
|
|
|
|
|
|
|
|
| 20| 20| 20| 20| 20|FT| CONDUIT PVC SCH 40 4 IN X 10 FT 4.500 OD BELLED
|
M M017471200
|
|
|
|
|
|
|
|
|
| 10| 10| 10| 10| 10|FT| CONDUIT PVC SCH 80 4 IN X 10 FT 3.826 ID BELLED
|
M M017458700
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|EA| BUSHING CONDUIT PVC RED 3-2 INV
|
L M017448600
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|EA| CLAMP GRND CPR F/4 SOL-2/0 STR 2 1/2 - 3 1/2 IN PIPE
|
L M017896400
|
|
|
|
|
|
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1|
1|
1|
1|
1|EA| CLAMP GRND COND S/BRONZE 4 - 5 IN PIPE
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L M017896500
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1|
1|
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1|
1|EA| CONNECTOR CABLE GROUNDING COPPER #8-1/0
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L M017895700
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1|
1|
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1|
1|EA| ROD GROUND G 5/8 IN X 8 FT
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L M017536200
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| 14| 14| 14| 14| 14|EA| SCREW DRIVE 0.25 IN 2.5 IN LG GALVANIZED HEX HEAD
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L M019016600
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1|
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1|
1|EA| SIGN WARNING UG ELECTRIC CBL 2.5 IN X 2.5 IN F/COND RISERS |
L M019410700
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1|
1|
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1|EA| SIGN WARNING CBL ALIVE BY BACK FEED 4 IN X 7 IN
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L M018455200
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|EA| STRAP PIPE POLE 3 IN GS 1 IN W 2-1/4 IN H 15D
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L M017667300
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7|
7|
7|
7|
7|EA| STRAP PIPE POLE 4 IN GS 1 IN W 2 1/4 IN H 15DD
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L M017667400
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|EA| WEATHERHEAD FOR 2 IN PVC COND SERVICE ENTRANCE
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L M018146700
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1|
1|
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1|
1|LB| WIRE TIE BARE CU #6 SOLID
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L M018034900
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR12.057.3N / R
| ORIGINAL ISSUE 01 / 01 / 95
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
02 / 01 / 05
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
SCOPE − All direct−buried primary cables shall be of the jacketed type. The cables may be random−laid with the
secondaries and other utilities under certain conditions, detailed in DTR 44.101.
INSTALLATION IN TRENCH − All direct−buried cables shall be installed at a depth of at least 30 inches in the
following order:
1. Ensure that the bottom of the trench is well−tamped and free of rocks.
2. Install the conduit, gluing all couplings.
3. Install secondaries and other utility cables or conduits in the trench.
4. Backfill with 12 inches clean fill not to contain stones larger than 2 inches in maximum diameter.
5. Install cable warning tape 12 inches over the conduit.
6. Fill in the remainder of the trench with native backfill.
7. Install pull line, including 10 feet of slack, and secure to conduit plug at each end of conduit run.
NATIVE BACKFILL
NOTE 1
30″
FINISHED GRADE
CAUTION TAPE
30″ MIN
12″
FUEL OR
WATER LINE
ÂÂ
Â
ÂÂ
Â
18″ MIN
IN ALL
DIRECTIONS
CLEAN FILL
CONDUIT FOR PRIMARY CABLE
(SCHEDULE 40 PVC)
(SECONDARIES
AND/OR OTHER
UTILITIES WITH OR
WITHOUT CONDUIT)
CROSS SECTION OF JOINT TRENCH
Notes
1. The trench shall be backfilled immediately following placement of the conduit.
2. 1/4−inch−diameter nylon pull line and plastic conduit plugs to be supplied and installed by contractor.
ORIGINAL
6/24/98
APPROVED
04/10/06
SINGLE−PHASE PRIMARY CABLE INSTALLATION
DIRECT−BURIED − IN CONDUIT
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 50.103
5
1/2″ : 1′
LIMIT FOUR CONDUITS MAXIMUM
PER KNOCKOUT
PRIMARY
PRIMARY
PRIMARY
OPTIONAL SPARE FOR FUTURE USE
OPTIONAL SPARE FOR FUTURE USE
A
A
8′ GROUND ROD
NOTE 7
8′ GROUND ROD
NOTE 7
FINISHED GRADE
PRIMARY
FIBERGLASS COVER
NOTE 1
CONDUIT PLUG
NOTE 4
CABLE WARNING TAPE
PULL LINE
IN CONDUIT
NOTE 4
30″
36″
12″
6″
COMPACTED FREE
DRAINING GRAVEL
NOTE 5
12″
8′ GROUND ROD
NOTE 7
8′ GROUND ROD
NOTE 7
SECTION A−A
Notes
1. Install 36″ D x 36″ H round handhole, SPC H−020, and fiberglass cover, SPC C−710.
2. Install conduit, with all joints cemented, through knockout to 4 inches inside handhole. Terminate conduit run with
end bell (e.g., SC 0177110 for 3−inch diameter). Conduit destination to be permanently marked on conduit end.
Conduit shall be minimum 3−inch−diameter, Schedule 40 PVC. Limit four 4−inch−diameter conduits per
knockout.
3. Gaps around conduit at knockout openings shall be sealed with cement mortar to prevent backfill from entering
handhole.
4. Install a 1/4−inch−diameter nylon pull line in each duct, including 10 feet of slack, and secure to conduit plug
(e.g., SC 0434785 for 3−inch diameter). Plugged conduit to be left accessible.
5. Install on virgin or well tamped gravel. Where poor soil exists, remove to 6 inches below bottom of handhole and
backfill with compacted clean gravel, free of foreign matter and debris, and extending 12 inches past edge of
structure. Remaining backfill shall not contain ashes, frozen material, debris or stones larger than 2 inches in
maximum dimension.
6. When installing cable, utilize pulling eyelets provided in handhole.
7. Galvanized steel ground rods to be installed in trench adjacent to handhole. See DTR 56.221.
8. For loadbreak junction connector installation, refer to DTR 50.111 for pad−mounted or DTR 50.269 for
submersible.
ORIGINAL
10/22/99
APPROVED
8/10/06
DIRECT−BURIED IN CONDUIT − INSTALLATION OF HANDHOLE
SINGLE−PHASE CABLE − LOADBREAK JUNCTION CONNECTOR
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 50.107 3
1/2″ : 1′
SECONDARIES AND/OR SERVICES
LIMIT FOUR CONDUITS MAXIMUM
PER KNOCKOUT
PRIMARIES AND/OR SECONDARIES
PRIMARIES AND/OR SECONDARIES
A
A
GROUND ROD
NOTE 4
GROUND ROD
NOTE 4
SECONDARIES AND/OR SERVICES
FINISHED GRADE
CONDUIT PLUG
NOTE 2c
3″
CABLE WARNING TAPE
30″
36″
PULL LINE
IN CONDUIT
NOTE 2c
12″
6″
COMPACTED FREE
DRAINING GRAVEL
NOTE 3
12″
8′ GROUND ROD
NOTE 4
SECTION A−A
8′ GROUND ROD
NOTE 4
Notes
1. Install 42″ x 48″ x 4″ pad, SPC P−009 and 36″ D x 36″ H round handhole, SPC H−020.
2. Install conduit, with all joints cemented, through knockout to 4 inches inside handhole. Terminate conduit run with
end bell (e.g., SC 0177110 for 3−inch diameter). Conduit destination to be permanently marked on conduit end.
Conduit shall be minimum 3−inch−diameter, Schedule 40 PVC. Limit four 4−inch−diameter conduits per knockout.
a. Primaries and secondaries in conduit to be installed at 30 inches below grade.
b. Services in conduit to be installed at 24 inches below grade.
c. Install a 1/4−inch−diameter nylon pull line in each duct, including 10 feet of slack, and secure to conduit plug
(e.g., SC 0434785 for 3−inch−diameter). Plugged duct to be left accessible.
d. Gaps around conduit at knockout openings shall be sealed with cement mortar to prevent backfill from entering
handhole.
3. Install on virgin or well tamped gravel. Where poor soil exists, excavate to 6 inches below bottom of handhole and
backfill with compacted clean gravel, free of foreign matter and debris, extending 12 inches past edge of structure.
Remaining backfill shall not contain ashes, frozen material, debris, or stones larger than 2 inches in maximum
dimension.
4. Galvanized steel ground rods to be installed in trench adjacent to handhole. See DTR 56.221.
5. Refer to DTR 58.107 for transformer connections.
6. Refer to DTR 54.203 for details on conduit stubs.
ORIGINAL
10/22/99
APPROVED
8/10/06
DIRECT−BURIED IN CONDUIT − INSTALLATION OF CONCRETE PAD
FOR SINGLE−PHASE PAD−MOUNTED TRANSFORMERS
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 58.185 3
40
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| A
NO PAD/HH 15 KV 25-167KVA XF-4POS CONN-SVC FROM XF
|
DTR58.185.3A
|
| B
NO PAD/HH 15 KV 25-167KVA XF-6POS CONN-SVC FROM XF
|
DTR58.185.3B
|
| C
NO PAD/HH 23 KV 25-167KVA XF-4POS CONN-SVC FROM XF
|
DTR58.185.3C
|
| D
NO PAD/HH 23 KV 25-167KVA XF-6POS CONN-SVC FROM XF
|
DTR58.185.3D
|
| E
NO PAD/HH 15 KV 25-167KVA XF-4POS CONN-SVC-PRI DE
|
DTR58.185.3E
|
| F
NO PAD/HH 15 KV 25-167KVA XF-6POS CONN-SVC-PRI DE
|
DTR58.185.3F
|
| G
NO PAD/HH 23 KV 25-167KVA XF-4POS CONN-SVC-PRI DE
|
DTR58.185.3G
|
| H
NO PAD/HH 23 KV 25-167KVA XF-6POS CONN-SVC-PRI DE
|
DTR58.185.3H
|
| I
15 KV 25-167KVA XF-4 POS-SVC FROM XF W/PAD TOP
|
DTR58.185.3I
|
| J
15 KV 25-167KVA XF-6 POS-SVC FROM XF W/PAD TOP
|
DTR58.185.3J
|
| K
23 KV 25-167KVA XF-4 POS-SVC FROM XF W/PAD TOP
|
DTR58.185.3K
|
| L
23 KV 25-167KVA XF-6 POS-SVC FROM XF W/PAD TOP
|
DTR58.185.3L
|
| M
15 KV 25-167KVA XF-1PH FUT EXT/LOOP OPEN-USE W/A&B
|
DTR58.185.3M
|
|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
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|
|EA| HANDHOLE CONCR PCST 36 IN DIA X 36 IN HIGH
|
U M017498800
|
|
|
1|
1|
1|
1|
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|
|
|EA| PAD CONCRETE PRECAST 42 X 48 X 4 IN
|
U M017510900
|
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1|
1|
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|
|EA| ARRESTER DISTR MOV ELBOW 18 KV
|
M M018071500
|
|
1|
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1|
1|
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|
|EA| ARRESTER SURGE 13.2 KV & 13.8 KV MGY SYS VOLT 12 KV RATING |
M M040860800
|
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2|
2|
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2|
2|
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2|
2|EA| BUSHING CONN LBK 15 KV
|
M M017754700
|
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2|
2|
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2|
2|
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2|
2|
|
|EA| BUSHING CONN LBK 25 KV
|
M M017754800
|
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2|
2|
|
|
1|
1|
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|
2|
2|EA| CONN ELBOW LBK 15 KV AL 1 STR 175 MIL POLY
|
M M017894600
|
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2|
2|
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1|
1|
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2|
2|
|
|EA| CONN ELBOW LBK 25 KV AL 1 STR 260 MIL POLY
|
M M017894800
|
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3|
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3|
|
3|
|
3|
|
3|
|
3|EA| CONN TERMINAL AL 4 POS 4-500 TO 2H PAD
|
M M017922300
|
|
|
3|
|
3|
|
3|
|
3|
|
3|
|
3|
|EA| CONN TERMINAL AL 6 POS 4-500 TO 2H PAD
|
M M017921200
|
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|
|EA| COVER HANDHOLE SOL FG 42 IN DIA
|
M M017481900
|
|
|
2|
2|
2|
2|
2|
2|
2|
2|
2|
2|
2|
2|EA| COVER INSULATING HOOD VINYL 6.75 IN H X 2.25 IN DP X 10 IN |
M M041661700
|
|
1|
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|
|EA| PLUG STANDOFF FDTHR 15 KV F/LBK ELB CONN
|
M M017979500
|
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|
|EA| PLUG STANDOFF FDTHR 25 KV F/LBK ELB CONN
|
M M017979700
|
|
1|
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|
|EA| RECEPTACLE DEADEND 15 KV F/LBK BSHG
|
M M017985400
|
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|
|EA| RECEPTACLE DEADEND 25 KV F/LBK BSHG
|
M M017985700
|
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|
|EA| STAND PARKING F/160 SERIES ESNA FITTINGS
|
M M018027100
|
|
|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|EA| BOLT MACHINE STS 1/2 X 1-3/4 IN
|
L M017443500
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| CONN VISE BRZ 13-35 #14 SHEAR HEAD BOLT
|
L M017928600
|
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|
|
|EA| CONNECTOR CABLE GROUNDING COPPER #8-1/0
|
L M017895700
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|
1|EA| LOCK EQUIP T-P 2.5 IN RING AW SHEAR SCREW
|
L M018997800
|
|
|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|EA| NUT HEX STS 18-8 1/2-13
|
L M017507300
|
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|
|
|EA| NUT PENTA S.S. UNC THEAD F/3/8 IN BOLT
|
L M017506100
|
|
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|
|
1|
1|
1|
1|
1|
1|
1|
1|EA| PROTECTOR CABLE VIR NYL FOR 3-6 IN DUCT
|
L M017533500
|
|
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|
|
|EA| ROD GROUND G 5/8 IN X 8 FT
|
L M017536200
|
|
|
1|
1|
1|
1|
1|
1|
1|
1|
2|
2|
2|
2|EA| SEAL CABLE JACKET KIT F/SOLID DIELECTRIC CABLES 0.95-1.63 IN|
L M018145600
|
|
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|
|
|
|
|EA| STUD HEX SHOULDER S.S. 3/8 IN UNC THREAD
|
L M017667000
|
|
|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|
6|EA| WASHER LOCK STS 18-8 1/2 IN
|
L M017680100
|
|
| 12| 12| 12| 12| 12| 12| 12| 12| 12| 12| 12| 12|EA| WASHER ROUND FLAT STS 18-8 1/2 IN BOLT
|
L M017702500
|
|
|
1|
1|
1|
1|
|
|
|
|
|
|
|
|LB| WIRE TIE BARE CU #6 SOLID
|
L M018034900
|
|
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|
|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR58.185.3A / M
| ORIGINAL ISSUE 02 / 14 / 00
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
11 / 04 / 03
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
41
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| N
23 KV 25-167KVA XF-1PH FUT EXT/LOOP OPEN-USE W/C&D
|
DTR58.185.3N
|
| O
HANDHOLE & FIBERGLASS COVER & GROUND RODS
|
DTR58.185.3O
|
| P
15 KV 25-167 KVA FUTURE TRANSFORMER
|
DTR58.185.3P
|
| Q
23 KV 25-167 KVA FUTURE TRANSFORMER
|
DTR58.185.3Q
|
| R
15 KV HANDHOLE WO/XF F/LOOP FEED
|
DTR58.185.3R
|
| S
23 KV HANDHOLE WO/XF F/LOOP FEED
|
DTR58.185.3S
|
| T
15 KV HANDHOLE WO/XF F/FUTURE DE
|
DTR58.185.3T
|
| U
23 KV HANDHOLE WO/XF F/FUTURE DE
|
DTR58.185.3U
|
| V
HANDHOLE 36 IN W/CONCRETE PAD TOP & GROUND RODS
|
DTR58.185.3V
|
|
|
|
|
|
|
|
|
|
|
|
|
|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| Z | Y | X | W | V | U | T | S | R | Q | P | O | N |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
|
|
|
|
1|
|
|
|
|
|
|
1|
|EA| HANDHOLE CONCR PCST 36 IN DIA X 36 IN HIGH
|
U M017498800
|
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1|
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|EA| PAD CONCRETE PRECAST 42 X 48 X 4 IN
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U M017510900
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1|
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1|EA| ARRESTER DISTR MOV ELBOW 18 KV
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M M018071500
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1|
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|EA| ARRESTER SURGE 13.2 KV & 13.8 KV MGY SYS VOLT 12 KV RATING |
M M040860800
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|EA| BUSHING CONN LBK 15 KV
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M M017754700
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|EA| BUSHING CONN LBK 25 KV
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M M017754800
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1|
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2|
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2|
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|EA| CONN ELBOW LBK 15 KV AL 1 STR 175 MIL POLY
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M M017894600
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1|
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2|
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2|
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|EA| CONN ELBOW LBK 25 KV AL 1 STR 260 MIL POLY
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M M017894800
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|EA| CONN TERMINAL AL 4 POS 4-500 TO 2H PAD
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M M017922300
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|EA| CONN TERMINAL AL 6 POS 4-500 TO 2H PAD
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M M017921200
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1|
|EA| COVER HANDHOLE SOL FG 42 IN DIA
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M M017481900
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|EA| COVER INSULATING HOOD VINYL 6.75 IN H X 2.25 IN DP X 10 IN |
M M041661700
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1|
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1|
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1|
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|EA| PLUG STANDOFF FDTHR 15 KV F/LBK ELB CONN
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M M017979500
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1|
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1|
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1|
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1|EA| PLUG STANDOFF FDTHR 25 KV F/LBK ELB CONN
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M M017979700
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|EA| RECEPTACLE DEADEND 15 KV F/LBK BSHG
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M M017985400
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1|EA| RECEPTACLE DEADEND 25 KV F/LBK BSHG
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M M017985700
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2|
2|
2|
2|
2|
2|
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|EA| STAND PARKING F/160 SERIES ESNA FITTINGS
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M M018027100
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|EA| BOLT MACHINE STS 1/2 X 1-3/4 IN
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L M017443500
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|EA| CONN VISE BRZ 13-35 #14 SHEAR HEAD BOLT
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L M017928600
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2|
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2|
|EA| CONNECTOR CABLE GROUNDING COPPER #8-1/0
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L M017895700
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|EA| LOCK EQUIP T-P 2.5 IN RING AW SHEAR SCREW
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L M018997800
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|EA| NUT HEX STS 18-8 1/2-13
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L M017507300
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4|
|EA| NUT PENTA S.S. UNC THEAD F/3/8 IN BOLT
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L M017506100
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|EA| PROTECTOR CABLE VIR NYL FOR 3-6 IN DUCT
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L M017533500
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2|
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2|
|EA| ROD GROUND G 5/8 IN X 8 FT
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L M017536200
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1|
1|
2|
2|
2|
2|
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|EA| SEAL CABLE JACKET KIT F/SOLID DIELECTRIC CABLES 0.95-1.63 IN|
L M018145600
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4|
|EA| STUD HEX SHOULDER S.S. 3/8 IN UNC THREAD
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L M017667000
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|EA| WASHER LOCK STS 18-8 1/2 IN
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L M017680100
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|EA| WASHER ROUND FLAT STS 18-8 1/2 IN BOLT
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L M017702500
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8|
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8|
|LB| WIRE TIE BARE CU #6 SOLID
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L M018034900
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR58.185.3N / V
| ORIGINAL ISSUE 02 / 14 / 00
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
11 / 04 / 03
|
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|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
1/2″ : 1′
SECONDARY FROM TRANSFORMER
LIMIT FOUR CONDUITS MAXIMUM
PER KNOCKOUT
SERVICE
SERVICE
A
A
SERVICES
FINISHED GRADE
FIBERGLASS COVER
NOTE 1
CONDUIT PLUG
NOTE 4
CABLE WARNING TAPE
30″
36″
PULL LINE
IN CONDUIT
NOTE 4
12″
6″
COMPACTED, FREE
DRAINING GRAVEL
NOTE 5
12″
SECTION A−A
Notes
1. Install 36″ D x 36″ H round handhole, SPC H−020, and fiberglass cover, SPC C−710.
2. Install conduit, with all joints cemented, through knockout to 4 inches inside handhole. Terminate conduit run
with end bell (e.g., SC 0177110 for 3−inch diameter). Conduit destination to be permanently marked on conduit
end. Conduit shall be minimum 3−inch−diameter, Schedule 40 PVC. Limit four 4−inch−diameter conduits per
knockout.
3. Gaps around conduit at knockout openings shall be sealed with cement mortar to prevent backfill from entering
handhole.
4. Install 1/4−inch−diameter nylon pull line in each duct, including 10 feet of slack, and secure to conduit plug
(e.g., SC 0434785 for 3−inch diameter). Plugged conduit to be left accessible.
5. Install on virgin or well tamped gravel. Where poor soil exists, remove to 6 inches below bottom of handhole and
backfill with compacted clean gravel, free of foreign matter and debris, and extending 12 inches past edge of
structure. Remaining backfill shall not contain ashes, frozen material, debris or stones larger than 2 inches in
maximum dimension.
6. When installing cable, utilize pulling eyelets provided in handhole.
7. Refer to DTR 54.203 for details on conduit stubs.
ORIGINAL
10/22/99
APPROVED
8/10/06
DIRECT−BURIED IN CONDUIT − HANDHOLE ACROSS STREET
SINGLE−PHASE CABLE − SECONDARY/SERVICE
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 54.201
3
43
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| A
STD SERVICE CONCRETE HANDHOLE
|
DTR54.201.1A
|
| B
STD SERV BUS CONN 4 POS 4-500 MCM
|
DTR54.201.1B
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| C
STD SERV BUS CONN 6 POS 4-500 MCM
|
DTR54.201.1C
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|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
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U=UNIT OF PROPERTY
STOCK
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|________________________________________________________________| |
|
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| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
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|____________________________________________________________________________________________________________________________________________________|
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1|EA| HANDHOLE CONCR PCST 36 IN DIA X 36 IN HIGH
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U M017498800
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1|EA| COVER HANDHOLE SOL FG 42 IN DIA
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M M017481900
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3|
|EA| CONN BUS INS 600V AL 4 POS 4-500MCM
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L M017849900
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3|
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|EA| CONN BUS INS 600V AL 6 POS 4-500MCM
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L M017850000
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4|EA| NUT PENTA S.S. UNC THEAD F/3/8 IN BOLT
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L M017506100
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4|EA| STUD HEX SHOULDER S.S. 3/8 IN UNC THREAD
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L M017667000
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR54.201.1A / C
| ORIGINAL ISSUE 02 / 15 / 00
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
11 / 04 / 03
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
TO COMPLETE SERVICE − MATE
CUSTOMER CONDUIT TO EXISTING, JOIN
PULL LINES, SLIDE CONDUIT SLEEVE OVER
BOTH ENDS AND SECURE WITH CONDUIT
CEMENT.
CONTRACTOR NOTE − FOR EASE IN
MATCHING CONDUIT LOCATION AND
ELEVATION, START LAYING CONDUIT AT
EASEMENT END AND WORK TOWARD
CUSTOMER END.
CONDUIT SLEEVE COUPLING
PROPERTY LINE
1/2″ : 1′
TEMPORARY DEADEND
NOTE 7
NOTE 5
10′ LENGTH OF CONDUIT
SECONDARY
LIMIT FOUR CONDUITS
MAXIMUM PER KNOCKOUT
PRIMARY CONDUITS BYPASS
SECONDARY HANDHOLE
10′ EASEMENT
SERVICES
22−1/2°
STREET TAKING LINE
THIS AREA FOR OTHER UTILITIES
SERVICES
Notes
1. Install 36″ D x 36″ H round handhole SPC H−020, SC 0174988, and fiberglass cover SPC C−710, SC 0174819.
2. Install on virgin or well tamped gravel. Where poor soil exists, remove to 6 inches below bottom of handhole and
backfill with compacted clean gravel, free of foreign matter and debris, and extending 12 inches past edge of
structure.
3. Install conduit, with all joints cemented, through knockout to 4 inches inside handhole. Conduit destination to be
permanently marked on conduit end. Conduit shall be minimum 3−inch−diameter, Schedule 40 PVC. Limit four
4−inch−diameter conduits per knockout.
4. Gaps around conduit at knockout openings shall be sealed with cement mortar to prevent backfill from entering
handhole.
5. Install a 1/4−inch−diameter nylon pull line in each duct, including 10 feet of slack, and secure to conduit plug
(e.g., SC 0434785 for 3−inch diameter). Plugged conduit to be left accessible.
6. When installing cable, utilize pulling eyelets provided in handhole.
7. Refer to DTR 54.118 for details on installation of temporary deadend.
ORIGINAL
10/22/99
APPROVED
8/10/06
DIRECT−BURIED IN CONDUIT − INSTALLATION OF HANDHOLE
600 VOLTS AND BELOW − SINGLE−PHASE − SECONDARY/SERVICE
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 54.203 3
45
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| A
HANDHOLE WITH 42 IN FG COVER
|
DTR54.203.0A
|
| B
STD SERVICE BUS CONN 4 POS 4-500MCM
|
DTR54.203.0B
|
| C
STD SERVICE BUS CONN 6 POS 4-500MCM
|
DTR54.203.0C
|
| D
42 IN FIBERGLASS COVER ONLY
|
DTR54.203.0D
|
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|
|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
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|
|
1|EA| HANDHOLE CONCR PCST 36 IN DIA X 36 IN HIGH
|
U M017498800
|
|
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|
|
1|
|
|
1|EA| COVER HANDHOLE SOL FG 42 IN DIA
|
M M017481900
|
|
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4|
|
|
|EA| BOLT MACHINE PNHD STS 3/8 X 1 IN
|
L M017438800
|
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|
3|
|EA| CONN BUS INS 600V AL 4 POS 4-500MCM
|
L M017849900
|
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3|
|
|EA| CONN BUS INS 600V AL 6 POS 4-500MCM
|
L M017850000
|
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|
4|EA| NUT PENTA S.S. UNC THEAD F/3/8 IN BOLT
|
L M017506100
|
|
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|
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|
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|
4|EA| STUD HEX SHOULDER S.S. 3/8 IN UNC THREAD
|
L M017667000
|
|
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4|
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|
|EA| WASHER ROUND FLAT G 3/8 IN BOLT
|
L M017683800
|
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR54.203.0A / D
| ORIGINAL ISSUE 02 / 14 / 00
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
11 / 04 / 03
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
LOCATION TAG,
TO BE INSTALLED BY
NORTHEAST UTILITIES
UNDERGROUND CABLE SIGN,
TO BE INSTALLED BY
NORTHEAST UTILITIES
3″ PVC DEAD−END CAP
FINISHED GRADE
DEPTH
NOTE 4
WARNING TAPE
CT/MA − LOCATE 12″
ABOVE TOP OF CONDUIT.
NH − LOCATE 12″ BELOW
FINISHED GRADE.
WELL TAMPED EARTH
ËËËË
ËËËË
1/
PLASTIC CONDUIT PLUG
4″
NYLON PULL LINE
CONDUIT, SCHEDULE 40 PVC
Notes
1. Install temporary dead−end cap where customer’s trench ends on private property if customer is not ready
for service.
2. Remove PVC dead−end cap, extend conduit, and pull cable when service is extended to future building, vault,
or transformer.
3. The contractor is responsible for all material shown, unless noted otherwise. Location tag and underground cable
sign to be supplied and installed by Northeast Utilities.
4. Minimum burial depth shall be as follows: CT/MA − 24 inches for secondary cable and 30 inches for primary
cable. NH − 30 inches for secondary cable and 36 inches for primary cable.
ORIGINAL
6/24/98
APPROVED
1/24/06
DIRECT−BURIED CONDUIT SYSTEM − TEMPORARY DEAD−END CAP
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 54.118
3
1–1/2″ DIA
5/8″ DIA
38–1/2″ BOLT
CIRCLE
ELECTRIC
5/8″
NOTE 3
1/4″ MIN
NON–SKID
SURFACE
4″
5/8″ MAX
42″ DIAMETER
COVER
A
A
DETAIL A
ELECTRIC
SEE DETAIL A
38–1/2″
42″
SECTION A–A
Notes
1. Cover shall conform to ASTM D790.
2. DESIGN LOADING shall be 4,500 pounds applied at the center of the cover over a 6″ X 6″ area. The cover will
be supported by a 36–inch ID ring. The total deflection of the cover shall not exceed 4 inches with load applied
for 5 minutes.
3. Plywood core designs shall be encapsulated in a fiberglass–reinforced polyester laminate a minimum of 1/8 inch
thick on all surfaces, consisting of a spray up of chopped glass and resin totaling 5 ounces per square foot of
surface. The glass content will be a minimum of 25 percent on the top, and will be increased on the bottom if
necessary to meet the design loading specified in NOTE 1. The plywood core will comply with the American
Plywood Association Standard PS 1–1974, DFPA GRADE, GROUP 1, EXTERIOR C–C or better.
4. The cover shall be permanently embossed with both manufacturer’s name and the word “ELECTRIC” as shown.
5. The resin and the gel coat will be pigmented dark green, and there shall be no exposed glass on any surface.
6. A stainless steel or brass washer, 1–3/8 inch OD with a 5/8–inch hole, will be epoxied into the pentahead
recess. There should be no exposed wood in the recess.
ORIGINAL
5/13/86
APPROVED
6/14/97
COVER – HANDHOLE – HEXAGONS AND ROUND
42–INCH DIAMETER
MATERIAL SPECIFICATION
NORTHEAST UTILITIES
– SPC C–710 – 3
67–1/2°
22–1/2°
A
NOTE 1
22–1/2°
A
45°
NOTE 2
18″
22–1/2°
NOTE 2
NOTE 1
4″
#4 REBAR
HANDHOLE/VAULT EXTENSION
(FOR GRADE ADJUSTMENT)
3″
2″
GALVANIZED WASHER
1–3/4″ DIAMETER
11/16″ HOLE
ÇÇÇ
ÇÇÇ
1″
38–1/2″ DIAMETER BOLT CIRCLE
NOTE 2
3/4″
3″
SECTION A–A
NOTES
1. Two zinc alloy iron inserts 3/8 inch – 16 x 1–1/2 inches on 38–1/2 inch bolt circle.
2. Two holes equally spaced on 38–1/2 inch bolt circle.
3. Final 28 day concrete strength 4000 psi.
4. Concrete and concrete design shall be in accordance with ACI 318–1986 latest revision thereof.
5. Manufacturer’s identification and month/year when manufactured shall be legibly marked in/on concrete on the
inner side.
6. Construction tolerances shall allow for the mating of two 180 degree segments, on NU SPC’s H–020 and V–025,
to achieve a 360 degree extension.
ORIGINAL
8/5/70
APPROVED
6/1/91
EXTENSION – HANDHOLE/VAULT – PRECAST CONCRETE
180 DEGREE SEGMENT X 36″ DIAMETER X 4″ HIGH
MATERIAL SPECIFICATION
NORTHEAST UTILITIES
– SPC E–953 – 8
NOTE 4
NOTE 3
22–1/2°
B
22–1/2°
3″ x 6″–W2.9 x W2.9, WELDED STEEL
WIRE FABRIC, AS PER ASTM A–185
(ALTERNATE – 6″ x 6″–W1.4 x W1.4,
W/TWO 1/4″ DIA REBAR HOOPS
CENTERED AT 6″ AROUND
EYELETS. SEE SECTION B–B)
NOTE 5
B
45°
A
A
c
36″
NOTE 9
NOTE 4
NOTE 4
6″
18″
NOTE 7
36″
6″
NOTE 3
B
12″
12″
3″
8″
3″ 4″
15″
10″
NOTE 6
9″ 10″
1/4″ REBAR
NOTE 8
3″
NOTE 9
9″
3″ x 6″–W2.9 x W2.9, WELDED STEEL
WIRE FABRIC, AS PER ASTM A–185
(ALTERNATE – 6″ x 6″–W1.4 x W1.4,
W/TWO 1/4″ DIA REBAR HOOPS
CENTERED AT 6″ AROUND EYELETS)
NOTE 5
5/8″–11, 5″ LONG, MACHINE BOLT, GALV,
W/SQUARE NUT, AS PER ANSI C135.1–1979,
FOR USE W/EYELET, STANDARD, LONG,
GALV, AS PER ANSI C135.5–1987
3″ x 3″ x 1/4″ CURVED SQUARE WASHER,
GALV, W/13/16″ HOLE, AS PER EEI TDJ10
NOTE 8
B
SECTION B–B
SECTION A–A
(SHOWS ALTERNATE REBAR LOCATION)
Notes
1. Concrete and concrete design shall be in accordance with ACI 318–1995.
2. Concrete strength 5000 psi at 28 days. Air entrainment 6 to 8 percent.
3. Four zinc alloy inserts 3/8″ – 16 x 1–3/8″ equally spaced on 38–1/2″ bolt circle.
4. Four zinc alloy inserts 5/8″ – 11 x 1–11/16″ equally spaced on 38–1/2″ bolt circle.
5. Eight zinc alloy inserts 3/8″ – 16 x 1–3/8″.
6. Four eyelets, for use as pulling points, shall be installed adjacent to and centered above knockouts as shown.
7. Manufacturer’s identification and month/year when manufactured shall be legibly marked in/on concrete on the
outside upper part.
8. Location of each knockout shall be identifiable from exterior of handhole by providing a 3″ diameter circle
imprinted 1/4″ deep into the concrete. Center of the imprinted circle shall be located at center of each knockout.
9. All knockouts shall have a web thickness not to exceed 3/4″ ±1/8″. Knockouts to be free of reinforcement.
10. The two recesses 12″ from top are for use with adjustable lifter tool only.
11. Eyelets and zinc alloy inserts not to be used for lifting.
ORIGINAL
5/13/86
APPROVED
6/9/00
HANDHOLE – ROUND – PRECAST CONCRETE
36″ DIAMETER x 36″ HIGH
MATERIAL SPECIFICATION
NORTHEAST UTILITIES
SPC H–020
6
ML 1245
D
6″ X 6″ 10 GAUGE
WIRE MESH REINFORCEMENT
2″
2″
2″
c
7″
7″
NOTES 2&3
48″
2″
A
#4 BAR
26–1/2″
16″ 14–1/2″
36″
A
28″
6″
36″
42″
28″
1/4″
3/4″
4″
26–1/2″
SECTION A–A
NOTES
1. Final 28 day concrete strength to be 5000 psi.
2. A 3/4 inch coil loop insert (Dayton F63) with an insert locator plug (Dayton T21) for lifting the pad at the center
of gravity with a swivel plate.
3. Manufacturer’s identification and month/year when manufactured shall be legibly marked in/on concrete in the
top near the center.
4. Concrete and concrete design shall be in accordance with ACI 318–1986.
ORIGINAL
4/23/70
APPROVED
8/1/91
PAD – PRECAST CONCRETE – TRANSFORMER
167 KVA MAXIMUM – 42″ X 48″ X 4″
MATERIAL SPECIFICATION
NORTHEAST UTILITIES
– SPC P–009 – 11
ML 1245
B
A
A
B
13″ #3 REBAR
1–1/4″
25″ #3 REBAR
1/8″
4″
26″
13–3/4″
28″
16″
SECTION A–A
SECTION B–B
NOTES
1. Final 28 day concrete strength to be 3500 psi minimum.
2. A 3/4 inch coil loop insert (Dayton F–63) with an insert locator plug (Dayton T–21) for lifting the pad at the center of
gravity with a swivel plate.
3. Threaded insert shall be plastic capped to stop dirt buildup.
4. Threaded inserts shall be greased on inside to prevent corrosion.
5. Manufacturer’s name and month/year of construction shall be legibly marked in concrete on the bottom.
ORIGINAL
5/13/86
APPROVED
8/1/91
PAD – PLUG – PRECAST CONCRETE – 16″ X 28″ X 4″
FOR THE 42″ X 48″ X 4″ PAD
NORTHEAST UTILITIES
MATERIAL SPECIFICATION
SPC P–010
2
ML 145
D
48″
24″
24″
9″
30″
GALVANIZED
WASHER
1–3/4″ DIA
11/16″ HOLE
9″
NOTE 4
5–1/8″
9″
2″
1″
24″
27″
4–3/4″
4–3/4″
38–1/2″
37–3/4″
48″
A
30″
39–1/2″
32″
B
24″
3/4″
A
SECTION A–A
B
8–1/2″
8–1/2″
9″
5–1/8″
EIGHT ZINC ALLOY INSERTS
5/8″–11 X 1–1/2″
#4 REBAR 40″ X 40″
1/4″
3/4″
4″
SECTION B–B
NOTES
1. Final 28 day concrete strength to be 5000 psi.
2. Manufacturer’s identification and month/year when manufactured shall be legibly marked in/on concrete in the
top within 4 inches of the opening.
3. Concrete and concrete design shall be in accordance with ACI 318–1986.
4. Two 3/4 inch coil loop inserts (Dayton F63) with an insert locator plug (Dayton T21) for lifting the pad with a
swivel plate.
ORIGINAL
2/17/76
APPROVED
11/1/94
PAD – ENCLOSURE – PRECAST CONCRETE
48″ X 48″ X 4″
MATERIAL SPECIFICATION
NORTHEAST UTILITIES
– SPC P–017 – 9
Notes
1. Use with any single–phase pad–mounted or submersible transformer or single–phase switchgear.
2. Depending on steepness of the grade, select either 16– or 32–inch–high model.
3. Always place hill holder with the back toward the grade. Do not install with the side of the hill holder facing the
grade; this product is not designed to support side loads.
4. Make sure that 2–inch flange is properly secured with an adequate amount of soil to prevent the hill holder from
being removed or vandalized.
ORIGINAL
6/22/90
HILL HOLDER – DIRECT–BURIED SYSTEM
APPROVED
11/2/99
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 50.341
2
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
|
A
HILLHOLDER 16" GRADE ADJUSTMENT
|
DTR50.341.0A
|
|
B
HILLHOLDER 32" GRADE ADJUSTMENT
|
DTR50.341.0B
|
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|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
|
|
|
|
|
|
|
|
|
|
|
|
1|EA| HOLDER HILL FG 16 X 44 X 52 IN
|
M M018340600
|
|
|
|
|
|
|
|
|
|
|
|
|
1|
|EA| HOLDER HILL FG 32 X 44 X 52 IN
|
M M018340700
|
|
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR50.341.0A / B
| ML
| ORIGINAL ISSUE
4 / 13 / 91 |
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
1 / 1 / 97
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
54
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
ÏÏÏÏÏÏÏÏÏÏÏÏ
PENTA NUT
SC 0175061
HANDHOLE COVER
SC 0174819
(SEE SPC C–710)
4″ EXTENSION
SC 0174870
(SEE SPC E–953)
HEX–SHOULDER STUD
SC 0176670
4″ BOLT FOR ONE EXTENSION
SC 0174355
(8″ BOLT FOR TWO EXTENSIONS
SC 0174356)
HANDHOLE, 36″ x 36″
SC 0174988
(SEE SPC H–020)
Notes
1. Fiberglass cover – Install stud with 1–1/4–inch end down and 1–inch end up.
2. Use extensions for grade adjustments only.
3. Use stud and penta nut with fiberglass cover.
ORIGINAL
5/25/88
APPROVED
12/18/00
COVER AND GRADE EXTENSIONS
ROUND HANDHOLE
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 50.401
5
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
| A
HANDHOLE WITH 42IN FIBERGLASS COVER
|
DTR50.401.1A
|
| B
4 INCH CONCRETE EXTENSION
|
DTR50.401.1B
|
| C
8 INCH CONCRETE EXTENSION
|
DTR50.401.1C
|
| D
FIBERGLASS 42" COVER DB
|
DTR50.401.1D
|
|
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|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
|
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1|EA| HANDHOLE CONCR PCST 36IN DIA X 36IN HIGH
|
U M017498800
|
|
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1|
|
|
1|EA| COVER HANDHOLE SOL FG 42 IN DIA
|
M M017481900
|
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4|
2|
|EA| EXTENSION VLT/HH CONCR 1/2 SEG 36IN X 4IN
|
M M017487000
|
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4|
|EA| BOLT MACHINE G 5/8 X 4 IN
|
L M017435500
|
|
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4|
|
|EA| BOLT MACHINE G 5/8 X 8 IN
|
L M017435600
|
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4|EA| NUT PENTA S.S. UNC THEAD F/3/8" BOLT
|
L M017506100
|
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|
4|EA| STUD HEX SHOULDER S.S. 3/8" UNC THREAD
|
L M017667000
|
|
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR50.401.1A / D
|
| ORIGINAL ISSUE
9 / 3 / 88
|
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
2 / 15 / 01
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
56
SECURE HALVES OF
SPLIT PAD WITH
SUPPLIED BOLTS
4″
Notes
1. Make sure that there is enough slack in the primary and secondary cables to allow for raising the transformer.
2. The split pad is to be placed on top of the existing concrete pad.
3. For additional height, a second or third split pad can be installed, one over the other.
4. The transformer can be secured to the split pad with transformer clips installed in the adjustable struts with
3/8″ x 1–1/2″ bronze bolts, SC 0174429.
ORIGINAL
9/28/87
APPROVED
11/2/99
GRADE ADJUSTMENT
SINGLE–PHASE – PAD–MOUNTED TRANSFORMER
NORTHEAST UTILITIES
CONSTRUCTION STANDARD
DTR 58.195
3
______________________________________________________________________________________________________________________________________________________
|
CONSTRUCTION STANDARD VARIATION
|
CONSTRUCTION UNIT IDENTIFIER
|
|____________________________________________________________________________________________________________________________________________________|
|
A
4" GRADE ADJ FOR 1 PH PAD TRANS DB
|
DTR58.195.0A
|
|
B
4" GRADE ADJ FOR 1 PH PAD TRANS UG
|
DTR58.195.0B
|
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|____________________________________________________________________________________________________________________________________________________|
|
STOCK CODE QUANTITY
| |
|
U=UNIT OF PROPERTY
STOCK
|
|________________________________________________________________| |
|
|
| M | L | K | J | I | H | G | F | E | D | C | B | A |UM|
STOCK CODE DESCRIPTION
|
M=MINOR
L=LOBBY
CODE
|
|____________________________________________________________________________________________________________________________________________________|
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1|
1|EA| PAD TOP SPLIT FG/CONC 42X48X4"
|
M M017509900
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|____________________________________________________________________________________________________________________________________________________|
| PAGE
DTR58.195.0A / B
| ML
| ORIGINAL ISSUE
4 / 13 / 91 |
|
|__________________________________________________|
| 1 OF 1
| REVISION DATE
1 / 1 / 97
|
|
|__________________________________________________|
|
NORTHEAST UTILITIES CONSTRUCTION STANDARD ESTIMATING UNITS
| APPROVED BY
|
|____________________________________________________________________________________________________________________________________________________|
58