SECTION 16124 – UNDERGROUND DISTRIBUTION
PART 1 - GENERAL
1.1
A.
1.2
A.
1.3
RELATED DOCUMENTS
Drawings and general and special provisions of the Contract apply to this Section.
SUMMARY
This Section includes cables and related splices, terminations, conduit, switch
cabinets, and accessories for medium-voltage electrical distribution systems. Work
described herein and on related drawings E-1 and E-2 is referenced on the original
contract drawings E111 and E112 as being provided by PALO. Except as noted
herein, this material and installation labor is to be included in the Contractor's bid.
DEFINITIONS
A.
AEIC: Association of Edison Illuminating Companies
B.
ANSI: American National Standards Institute
C.
IEEE: Institute of Electrical and Electronics Engineers
D.
NESC: National Electrical Safety Code, ANSI/IEEE C2, 2007 Edition
E.
PAES: City of Port Angeles Department of Public Works & Utilities, Engineering
Services Division
F.
PALO: City of Port Angeles Department of Public Works & Utilities, Light Operations
Division.
1.4
A.
1.5
A.
SUBMITTALS
Product Data: For switch cabinets, junction boxes, and terminations for each type of
cable indicated.
QUALITY ASSURANCE
Installation of conduit, cable, terminations, and equipment shall be supervised and
inspected by a Journeyman Lineman trained and certified to install, splice, and
terminate medium-voltage cable. Progress inspections and final inspection will be
conducted by PALO and/or PAES personnel.
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16124 - 1
B.
Electrical Components, Devices, and Accessories: Where such listing is available,
equipment shall be listed and labeled as defined in NFPA 70, Article 100, by a testing
agency acceptable to the PAES, and marked for intended use.
C.
Comply with applicable provisions of the NESC.
1.6
A.
PROJECT CONDITIONS
Interruption of Existing Electric Service: Do not interrupt electric service to customers
unless permitted under the following conditions and then only after arranging to provide
temporary electric service according to requirements indicated:
1.
2.
Notify PALO no fewer than two days in advance of proposed interruption of
electric service.
Do not proceed with interruption of electric service without PALO permission.
PART 2 - PRODUCTS
2.1
A.
MANUFACTURERS
Manufacturers: Subject to compliance with requirements, provide products by one of
the following, or approved equals:
1.
Cable Splicing and Terminating Products and Accessories:
a.
b.
c.
d.
e.
f.
g.
h.
2.
Switch Cabinets:
a.
3.
A.
S&C Electric
Junction Cabinets:
a.
2.2
Engineered Products Company.
G&W Electric Company.
MPHusky.
Raychem Corp.; Telephone Energy and Industrial Division; Tyco
International Ltd.
RTE Components; Cooper Power Systems, Inc.
Thomas & Betts Corporation.
Thomas & Betts Corporation/Elastimold.
3M; Electrical Products Division.
Maysteel
CONDUIT
Provide and install rigid non-metallic conduit made of virgin polyvinyl chloride resin,
extruded, Schedule 80 PVC rigid conduit, light gray in color, supplied in 10 foot lengths
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each with a coupling. It shall be U.L. listed and bear the label for use above ground,
underground direct burial and concrete encased. It shall be cut square with all rough
edges removed from ends to protect the wires from abrasion. All connections shall be
made by solvent welding. All fittings shall be U.L. listed and installed in accordance
with the manufacturer's recommended procedures.
2.3
CABLES
A.
Single phase distribution cables shall be provided by PALO for installation by the
Contractor. Cable shall be single conductor, 1/0 AL, 15kV EPR, with 133% insulation,
full concentric neutral and jacketed.
B.
Three phase distribution feeder cables shall be provided by PALO for installation by
this Contractor. Cable shall be single conductor, 4/0 or 500 MCM AL 15kV EPR, with
133% insulation, full concentric neutral, and jacketed.
2.4
SPLICE KITS
A.
Connectors and Splice Kits: Comply with IEEE 404; type as recommended by cable or
splicing kit manufacturer for the application.
B.
Splicing Products: As recommended, in writing, by splicing kit manufacturer for
specific sizes, ratings, and configurations of cable conductors. Include all components
required for complete splice, with detailed instructions.
1.
2.
3.
4.
2.5
A.
2.6
Combination tape and cold-shrink-rubber sleeve kit with rejacketing by castepoxy-resin encasement or other waterproof, abrasion-resistant material.
Heat-shrink splicing kit of uniform, cross-section, polymeric construction with
outer heat-shrink jacket.
Premolded, cold-shrink-rubber, in-line splicing kit.
Premolded EPDM splicing body kit with cable joint sealed by interference fit of
mating parts and cable.
SOLID TERMINATIONS
Nonshielded-Cable Terminations: Kit with compression-type connector. Include
silicone-rubber tape, cold-shrink-rubber sleeve, or heat-shrink plastic-sleeve moisture
seal for end of insulation whether or not supplied with kits.
SEPARABLE INSULATED CONNECTORS
A.
Description: Modular system, complying with IEEE 386, with disconnecting, singlepole, cable terminators and with matching, stationary, plug-in, dead-front terminals
designed for cable voltage and for sealing against moisture.
B.
Load-Break Cable Terminators: Elbow-type units with 200-A load make/break and
continuous-current rating; coordinated with insulation diameter, conductor size, and
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material of cable being terminated.
capacitance coupled.
Include test point on terminator body that is
C.
Dead-Break Cable Terminators: Elbow-type unit with 600-A continuous-current rating;
designed for de-energized disconnecting and connecting; coordinated with insulation
diameter, conductor size, and material of cable being terminated. Include test point on
terminator body that is capacitance coupled.
D.
Dead-Front Terminal Junctions: Modular bracket-mounted groups of dead-front
stationary terminals that mate and match with above cable terminators. Two-, three-,
or four-terminal units as indicated, with fully rated, insulated, watertight conductor
connection between terminals and complete with grounding lug, manufacturer's
standard accessory stands, stainless-steel mounting brackets, and attaching hardware.
1.
2.
3.
4.
2.7
Protective Cap: Insulating, electrostatic-shielding, water-sealing cap with drain
wire.
Portable Feed-Through Accessory: Two-terminal, dead-front junction arranged
for removable mounting on accessory stand of stationary terminal junction.
Grounding Kit: Jumpered elbows, portable feed-through accessory units,
protective caps, test rods suitable for concurrently grounding three phases of
feeders, and carrying case.
Standoff Insulator: Portable, single dead-front terminal for removable mounting
on accessory stand of stationary terminal junction. Insulators suitable for fully
insulated isolation of energized cable-elbow terminator.
SWITCH CABINETS
A.
Provide and install one S&C PME-9 switch cabinet and concrete vault. Comply with
PAES Standard Specification MDUS-301, included with this Addendum.
B.
Provide and install six S&C E-type fuses of the sizes noted on the drawings.
2.8
JUNCTION CABINETS – COPA Stock Number 285-099-00002
A.
Provide and install one 3-phase pad-mounted junction cabinet with three 200 Amp, 4way junction bars, per PAES standard U306. Include ground sleeve.
B.
Maysteel #CC378-22TH.
2.9
A.
2.10
A.
TRANSFORMERS
Pad-mounted transformers and vaults shall be provided by PALO for installation by this
Contractor. Contractor shall provide cable terminations, and install transformer vaults,
transformers, and terminate cables per PAES Standard U104.
POLE-MOUNTED DISCONNECTS – COPA Stock Number 285-067-00001
Distribution Class open blade switch, 600 Amps continuous, 40 kAIC
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B.
Hubbell #M3D66B, or equal.
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install cables according to IEEE 576.
B.
Pull Conductors: Do not exceed manufacturer's recommended maximum pulling
tensions and sidewall pressure values.
1.
2.
Use manufacturer-approved pulling compound or lubricant that will not
deteriorate conductor or insulation.
Use pulling means, including fish tape, cable, rope, and basket-weave cable
grips that will not damage cables and raceways. Do not use rope hitches for
pulling attachment to cable.
C.
Install exposed cables parallel and perpendicular to surfaces of exposed structural
members and follow surface contours where possible.
D.
Install switch and junction cabinets according to PAES Standards U309 and U305
included with these specifications.
E.
In manholes, handholes, pull boxes, junction boxes, and cable vaults, train cables
around walls by the longest route from entry to exit and support cables at intervals
adequate to prevent sag.
F.
Install cable splices at pull points and elsewhere as indicated; use standard kits.
G.
Install terminations at ends of all conductors.
H.
Install separable insulated-connector components as follows:
1.
2.
I.
3.2
A.
Protective Cap: At each terminal junction, with one on each terminal to which no
feeder is indicated to be connected.
Standoff Insulator: Three.
Ground neutral conductors at terminations, splices, and separable insulated
connectors. Ground metal bodies of terminators, splices, cable and separable
insulated-connector fittings, switch cabinets, and hardware.
FIELD QUALITY CONTROL
Perform the following field tests and inspections and prepare test reports:
1.
2.
Perform each visual and mechanical inspection and electrical test stated in
NETA ATS. Certify compliance with test parameters.
After installing medium-voltage cables and before electrical circuitry has been
energized, test for compliance with requirements.
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B.
Remove and replace malfunctioning units and retest as specified above.
END OF SECTION 16124
UNDERGROUND DISTRIBUTION
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CITY OF PORT ANGELES
PUBLIC WORKS AND UTILITIES
Specification for Three-Phase
Pad-Mounted 600 Amp Switch Cabinets
MDUS-301
1. GENERAL
1.1.
This specification covers the electrical and mechanical characteristics of three
phase, 60 Hz, 600 ampere pad-mounted switch cabinets.
1.2.
All characteristics, definitions, and terminology, except as specifically covered
in this specification, shall be in accordance with the latest revision of the
following ANSI and NEMA standards.
C57.12.28 -
Pad-Mounted Equipment - Enclosure Integrity.
2. RATINGS
2.1.
Switches and buss shall be rated for 600 A continuous, 25,000 A one-second
RMS symmetrical fault current, 65,000 A peak withstand current.
2.2.
The primary voltage shall be 14.4 kV nominal for use on 12470GrdY/7200V
system, and the basic impulse insulation level (BIL) shall be 95 kV.
2.3.
Switch terminals shall be equipped with 600 A dead-front bushings. Fuse
terminals shall be equipped with 200 A bushing wells. Bushings and bushingwell interfaces shall be in accordance with ANSI/IEEE Standard 386 to accept
all standard separable insulated connectors and inserts.
3.
GENERAL DESIGN
3.1
Switch cabinet shall be free-standing, self-supporting construction, not
intended for bolting directly to transformers, with provisions for cable entrance
and exit through the bottom.
3.2
Access to termination compartments shall be controlled by pentahead
latching bolt that can only be opened after a padlock is removed.
3.3
Enclosure roof shall be undercoated with an insulating “no-drip” compound.
3.4
A resilient closed-cell gasket on the enclosure bottom flange shall protect the
finish from being scratched during installation and isolate it from the alkalinity
of a concrete foundation.
City of Port Angeles
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MDUS-301 (7/10)
3.5
Finish shall be corrosion resistant.
3.6
All switch and fuse components shall be enclosed in an inner grounded steel
compartment with a floor of 22-gauge galvanized steel sheet to keep out
foliage and animals.
Fiberglass-reinforced polyester barriers shall be
provided where required to achieve published BIL ratings.
3.7
Roof sections over the cable compartments shall be hinged to allow easy
cable pulling during installation.
3.8
Parking stands shall be adjacent to each bushing and bushing well.
Grounding provisions shall be located in each termination compartment
suitable for use with separable insulated connectors and related accessories.
3.9
Include provisions for mounting of fault-indicators (not included) with viewing
window in door.
4. SWITCHES
4.1
The 600 A switches shall provide 3-pole load-break switching of 3-phase
source circuits. A folding switch-operating handle secured in a switch
operating pocket shall be provided with each switch. Switches shall be
operable externally without opening cable access doors. S&C Mini-Rupters.
4.2
Fuse sections shall accommodate S&C SME-20 power fuses. Fuses shall
provide fault protection of the tap circuits and loadbreak inserts and separable
insulated connectors shall permit single-pole switching of the taps. A
mechanical interlock shall prevent access to the fuse before opening the
loadbreak separable insulated connector at the fuse terminal.
5. CATALOG NUMBERS
5.1
Cabinets shall be manufactured by S&C Electric, of the following model and
catalog numbers, or approved equals. Quantities of each shall be as
specified in the request for bids.
5.2
PME-9:
5.3
PME-10: S&C #65242R1-F2
5.4
PME-11: S&C #65162R1-F2
5.5
PME-12: S&C #65172R1-F2
S&C #65152R1-F2
6. SHIPPING
6.1
Units shall be palletized.
City of Port Angeles
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MDUS-301 (7/10)
7. WARRANTY
7.1
Any switch failing due to defective design, material, and/or workmanship
within twelve (12) months after being energized, or within 18 months after
delivery, shall be repaired or replaced without cost, including shipping
charges, to the City. Any defect in design, material, and/or construction
discovered within this period shall be corrected on all cabinets furnished on
the order at the manufacturer's expense.
END OF MDUS-301
City of Port Angeles
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MDUS-301 (7/10)