HomeMy WebLinkAbout260519 - LOW VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLESTHE KENT
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SECTION 26 05 19 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES
PART 1 - GENERAL
1.01 SUMMARY
A. This Section includes the following:
1. Building wires and cables rated 600 V and less.
2. Connectors, splices, and terminations rated 600 Volts and less.
1.02 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
B. General Requirements specifically applicable to Division 26 in addition to Division 00 and
Division 01 provisions.
C. Section 26 05 00 - Basic Electrical Requirements.
D. Section 26 05 21 – Metal Clad Cables - Type MC – 600V and Less.
E. Section 26 05 22 – Nonmetallic-Sheathed Cable - Types NM, NMC and NMS - 600V and
Less.
F. Section 26 05 26 – Grounding and Bonding for Electrical Systems.
G. Section 26 05 30 – Conduit.
H. Section 26 05 34 – Boxes.
1.03 REFERENCES
A. Review the Drawings and all sections of the Specifications for equipment furnished by other
Contractors and the Owner throughout the entire project.
B. See references noted in Specification Section 26 05 00, Paragraph 1.03.
C. UL Standard 44 - Requirements for single-conductor and multiple-conductor thermoset-
insulated wires and cables.
D. UL Standard 50 - Enclosures for electrical equipment intended to be installed and used in non-
hazardous locations.
E. UL Standard 83 - Requirements for 600 V, single-conductor, thermoplastic-insulated wires and
cables.
F. Federal Specification J-C-30B – Cable and Wire, Electrical.
G. NECA/AA 104-2000 – Installing Aluminum Building Wire and Cable.
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H. UL 486D - Sealed wire connector systems.
1.04 SYSTEM DESCRIPTION
A. Provide wire and cable for electrical work as indicated in Contract Documents, except for wires
and cables specified otherwise under specific sections.
1.05 SUBMITTALS
A. Submit shop drawings and product data under provisions of Division 01 and Section 26 05 00.
B. Product Data: For each type of product indicated.
1.06 QUALITY ASSURANCE
A. Wire and cable provided shall be NRTL certified and shall meet referenced requirements.
B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70,
Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for
intended use.
C. Comply with NFPA 70.
1.07 DELIVERY, STORAGE AND HANDLING
A. Deliver, store and handle materials in accordance with Section 26 05 00.
1.08 SEQUENCING AND SCHEDULING
A. Sequence and Schedule work in accordance with Division 01 and Section 26 05 00.
1.09 WARRANTY
A. Warranty in Accordance with requirements of Division 01 and Section 26 05 00.
PART 2 - PRODUCTS
2.01 CONDUCTORS AND CABLES – ACCEPTABLE MANUFACTURERS
A. Conductors and Cables Manufacturers: Subject to compliance with requirements, provide
products by one of the following:
1. Aetna Insulated Wire Company.
2. Alcan Products Corporation; Alcan Cable Division.
3. American Insulated Wire Corp.; a Leviton Company.
4. Cerro Wire and Cable Company, Inc.
5. General Cable Corporation.
6. Phelps Dodge International Corp.
7. Republic Wire, Inc.
8. Southwire Company.
9. The Okonite Company.
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2.02 MATERIALS
A. Copper Conductors: Comply with NEMA WC 70.
B. Conductor Insulation: Comply with NEMA WC 70 for Types THHN-THWN.
C. Flexible Cord: Comply with NEMA WC 70 for Type 50.
D. All materials shall have been manufactured within the last two years.
E. Conductor Materials:
1. Copper Conductors: Unless specifically indicated otherwise, all conductors shall be
98 percent conductivity copper.
2. Aluminum Conductors: Aluminum conductor may be utilized only under the following
conditions:
a. Aluminum conductor may be utilized for incoming electrical service conductors
and panel feeders, unless otherwise indicated.
b. Conductor material shall be an AA-8000 series electrical grade aluminum alloy
as required by the NEC.
c. Conductors shall be compact stranded type.
F. Conductor Sizes:
1. Conductors smaller than 12 AWG are not permitted, except under the following
conditions:
a. 14 AWG may be used for apartment circuits served by 15 ampere circuit
breakers unless otherwise indicated.
b. 14 AWG may be used for control with current less than 10 amps and wire
length less than 50 feet.
2. Conductors of 8 AWG or larger shall be stranded.
3. Aluminum Conductors:
a. Conductors shall be the compact stranded type.
G. Wire Insulation: 600 volt rated. Types THHW, THWN, THWN-2, THHN, XHHW, XHHW-2 and
THW. All conductor insulation shall be rated 75 degrees C or greater.
2.03 FINISHES
A. Labels and Color Coding:
1. Properly phase and identify busses, feeders, and branch circuit conductors throughout
the entire electrical system as required under NFPA 70:
2. Conductor color code shall be permanent type and be part of conductor covering or
outer insulation.
3. Color code individual conductors as follows:
Conductor
120/240 Volt, 1 Phase,
3 Wire Systems
120/208 Volt, 3 Phase,
4 Wire Wye Systems
Phase “A” Black Black
Phase “B” Red Red
Phase “C” (n/a) Blue
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Conductor
120/240 Volt, 1 Phase,
3 Wire Systems
120/208 Volt, 3 Phase,
4 Wire Wye Systems
Switch Leg Return Yellow Yellow
Switch Leg Travelers Purple Purple
Neutral White White
Ground Green Green
Isolated Ground Green with Yellow Stripe Green with Yellow Stripe
2.04 CONNECTORS AND SPLICES
A. Manufacturers: Subject to compliance with requirements, provide products by one of the
following:
1. AFC Cable Systems, Inc.
2. Hubbell Power Systems, Inc.
3. O-Z/Gedney; EGS Electrical Group LLC.
4. 3M; Electrical Products Division.
5. Tyco Electronics Corp.
B. Joints and Connection Manufacturers: Subject to compliance with requirements, provide
products by one of the following:
1. Ideal Industries.
2. 3M.
3. Ilsco.
4. NSI Industries.
5. Thomas & Betts Corporation.
C. Connectors:
1. Connectors shall be factory-fabricated connectors of size, ampacity rating, material,
type, and class for application and service indicated.
2. Connectors shall be of the following types:
a. Solderless, uninsulated high conductivity, corrosion resistant, compression
connectors conforming to UL 467
b. Insulated, indenter-type compression butt connectors
c. Insulated, integral self-locking flexible shell, expandable spring connectors
d. Uninsulated, indenter-type compression pigtail connectors
e. Welded-type connectors
3. Dry Locations:
a. Conductors up to #8: Twist-on wire connectors. Push-on connectors are not
acceptable. Connectors shall be Ideal “Wire-Nut”, Ideal “Wing-Nut, 3M
“Scotchlok”, or approved equal.
b. Conductors #6 and Larger: Insulated mechanical style connector or connector
block. Connector shall be as manufactured by ILSCO, NSI Industries, or
approved equal.
4. Damp and Wet Locations:
a. Conductors up to #6: Watertight, twist-on wire connectors UL listed for damp
and wet locations. Push-on connectors are not acceptable. Connectors shall
be Ideal “Weatherproof” and “Underground” or approved equals.
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b. Conductors #10 and Larger: Watertight, UL486D listed for direct burial/below
grade use and UL 50 listed for submersible applications. Insulated
mechanical style connector or connector block. Connector shall be as
manufactured by NSI Industries “Polaris Blue” or approved equal.
D. Pigtail Adapters: Pigtail adapters shall be crimp on, barrel-to-pigtail adapters that are UL 486B
90 degrees C listed and CSA certified, rated for 600V application, and rated for use with
copper and aluminum conductors. Pigtail adapters shall be ILSCO Model CMP Series or
approved equal.
E. Terminals:
1. Terminals shall be factory-fabricated connectors of size, ampacity rating, material,
type, and class for application and service indicated.
2. Terminals shall be of the following types:
a. Solderless, uninsulated, high conductivity, corrosion resistant, compression
terminals conforming to UL 467 and IEEE 837.
b. Insulated, compression terminals.
c. Solderless, high-conductivity, corrosion resistant, hex screw type, bolted
terminals.
d. Welded type terminals.
2.05 OTHER SPLICING AND TERMINATING EQUIPMENT
A. Shrinkable Tubing:
1. Subject to compliance with requirements of this Section, provide shrinkable tubing of
the following types:
a. Either irradiated modified polyvinyl chloride or irradiated modified polyolefin
heat shrinkable tubing.
b. Cold shrinkable tubing.
B. Tapes and Sealers:
1. Vinyl Tapes shall be Flame-retardant, cold and weather-resistant, 3/4 inch or 1 1/2
inches wide, as required, and conforming to UL 510 and ASTM D 3005.
a. For interior, dry location, provide 7 mils, conforming to ASTM D 3005 (Type I);
Scotch (3M) No. 33, or approved equal.
b. For exterior or damp and wet locations, provide 8.5 mils, conforming to ASTM
D 3005 (Type II); Scotch (3M) No. 88, or approved equal.
2. Rubber Tapes shall be Ethylene-propylene, rubber-based, 30-mil splicing tape, rated
for 130 Degree C operation; 3/4 inch and wider conforming to ASTM D 1373 and
Federal Specification HH-I-553 (Grade A); Scotch (3M) No. 130C, or approved equal.
C. Insulating Putty:
1. Insulating putty shall be rubber-based, 125-mil elastic filler putty; 1 1/2 inches wide;
Scotch (3M) Scotchfil, or approved equal.
D. Silicone Rubber Tapes:
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1. Silicone Rubber Tapes shall be inorganic silicone rubber, 12-mil, 130 Degree C rated,
anti-tracking, self-fusing tape; 1 inch wide, Scotch (3M) No. 70, or approved equal.
E. Sealer:
1. Sealer shall be liquid applied, fast-drying sealant; Scotch (3M) Scotchkote, or
approved equal.
PART 3 - EXECUTION
3.01 PREPARATION
A. Protect wires when pulling into conduit.
1. Use electrical pulling lubricant especially designed for application.
2. Do not exceed a tension of 0.008 times the circular-mil per conductor.
B. Vacuum and then swab all moisture from conduit runs immediately prior to installing wire in
conduits
C. Feeders: Copper. Solid for No. 12 AWG and smaller; stranded for No. 10 AWG and larger.
3.02 CONDUCTOR MATERIAL APPLICATIONS
A. Feeders:
1. Copper or Aluminum. Stranded.
B. Branch Circuits: Copper. Solid for No. 12 AWG and smaller; stranded for No. 10 AWG and
larger.
3.03 CONDUCTOR INSULATION AND MULTICONDUCTOR CABLE APPLICATIONS AND WIRING
METHODS
A. Service Entrance: Type THWN or XHHW-2, single conductors in raceway.
B. Feeders:
1. Exposed Feeders: Type THHN or THWN, single conductors in raceway.
2. Feeders Above Grade and Concealed in Ceilings, Walls, Partitions, and Crawlspaces:
Type THHN or THWN, single conductors in raceway, unless otherwise indicated.
3. Feeders below Slabs-On-Grade, and Underground: Type THWN or XHHW-2, single
conductors in raceway.
C. Branch Circuits:
1. Exposed Branch Circuits, Including in Crawlspaces: Type THHN or THWN, single
conductors in raceway.
2. Branch Circuits Above Grade and Concealed in Ceilings, Walls, and Partitions:
Type THHN or THWN, single conductors in raceway, unless otherwise indicated.
3. Branch below Slabs-On-Grade, and Underground: Type THWN, single conductors in
raceway.
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D. Cord Drops and Portable Appliance Connections: Type Bus-drop cable, hard service cord
with stainless-steel, wire-mesh, strain-relief device at terminations to suit application.
E. Class 1 Control Circuits: Type THHN or THWN, in raceway.
F. Class 2 Control Circuits: Type THHN or THWN, in raceway.
3.04 INSTALLATION
A. Install all conductors, wire and cable specified in the Section in conduit or other code
conforming raceway, unless specifically indicated otherwise.
B. Feeders:
1. Run feeders continuously without splices, except with the permission of the Engineer.
2. Conductor lengths for parallel feeders shall be identical in material type, stranding,
insulation and length.
3. Grouping of feeders in raceway system is not permitted unless specifically indicated in
the Contract Documents.
4. Lace or clip groups of feeder conductors together at distribution centers and pull
boxes.
C. Branch Circuit Wiring:
1. Dedicated Neutrals: Provide a dedicated neutral conductor for each circuit. Do not
share neutral conductors between separate circuits unless indicated otherwise on the
plans.
2. Grouping: Do not group more than nine conductors in one conduit. Conductors
include all phase conductors and the neutral conductors, switch legs and travelers.
D. Derating:
1. Adjust the size of conductors to maintain circuit ampacity by adjusting for the derating
requirements of Section 310.15 of the National Electrical Code.
2. Where non-linear loads are fed by a single-phase circuit, the neutral conductor shall
be considered to be current carrying conductor for purposes of calculating conductor
derating factors.
E. Grounding: Refer to Section 26 05 26 for grounding conductor requirements.
F. Use wire pulling lubricant for pulling No. 4 AWG and larger wire at pull-in point of the conduit.
For feeder runs over 200 feet in length, measure pulling tension using a dynamometer. Do not
exceed manufacturer’s recommendations.
G. Make splices only in accessible junction or outlet boxes.
3.05 INSTALLATION OF CONDUCTORS AND CABLES
A. Conceal cables in finished walls, ceilings, and floors, unless otherwise indicated.
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B. Use manufacturer-approved pulling compound or lubricant where necessary; compound used
must not deteriorate conductor or insulation. Do not exceed manufacturer's recommended
maximum pulling tensions and sidewall pressure values.
C. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that
will not damage cables or raceway.
D. Install exposed cables parallel and perpendicular to surfaces of exposed structural members,
and follow surface contours where possible.
E. Support cables according to Division 26 Section "Hangers and Supports for Electrical
Systems."
F. Identify and color-code conductors and cables according to Division 26 Section "Identification
for Electrical Systems."
3.06 CONNECTIONS
A. Tighten electrical connectors and terminals according to manufacturer's published torque-
tightening values. If manufacturer's torque values are not indicated, use those specified in
UL 486A and UL 486B.
B. Make splices and taps that are compatible with conductor material and that possess
equivalent or better mechanical strength and insulation ratings than unspliced conductors.
C. Wiring at Outlets: Install conductor at each outlet, with at least 12 inches of slack.
D. Splicing:
1. Splicing and terminating shall be as specified in this Section. Details of special
splicing and terminating shall be as shown on the Contract Drawings. Any splicing or
terminating methods other than those specified below, for which the components are
in accordance with the requirements of this Section, shall be submitted to the Engineer
for approval
2. General Purpose Wires and Cables
a. Splices in dry locations for sizes #10 and smaller shall use one of the
following:
b. Insulated, integral, self-locking flexible shell, expandable spring connectors
shall be applied to the twisted conductors. Two, half-lapped layers of vinyl
tape, extending to a distance of not less than one inch from the connector,
shall be applied.
c. Compression type, insulated butt connectors shall be applied to the butted
conductors by means of an appropriate crimping tool, providing controlled
indentation. Two, half-lapped layers of vinyl tape, extending to a distance of
not less than one inch from the connector, shall be applied.
d. Compression type, pigtail connectors shall be applied to the conductors by
means of an appropriate crimping tool, providing controlled indentation. The
connector shall be covered with a polyamide cap and two, half-lapped layers
of vinyl tape, extending to a distance of not less than one inch from the
connector, shall be applied.
e. Splices in dry locations for sizes #8 and larger shall use all of the following:
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f. Connectors shall be split sleeve solderless type or solderless compression
type.
g. Fill indents of connectors with Scotchfil.
h. Apply rubber splicing tape equal to the original insulation rating.
i. Apply two, half-lapped layers of vinyl tape, or a shrinkable tubing
j. Splices in wet locations for all sizes
k. Same as dry location specified above, with two coats of sealer or shrinkable
tubing over the vinyl tape
E. Terminations:
1. Terminations in dry locations for sizes #10 and smaller shall be with compression
terminals, insulated or uninsulated
2. Terminations in dry locations for sizes #8 AWG through 3/0 AWG shall be either
solderless uninsulated compression crimp type ring tongue terminals or bolted hex
screw type ring tongue lugs.
3. Terminations in dry locations for sizes 4/0 AWG and larger shall be solderless,
uninsulated compression crimp type ring tongue terminals.
4. Terminations in wet locations shall be as dry location terminations above, plus cover
the entire termination area with two, half-lapped layers of vinyl tape and apply two
coats of sealer over the tape.
3.07 CONSTRUCTION
A. Connections and Terminations:
1. Connect conductors 8 AWG and smaller with compression connectors or wire nuts.
2. Connect conductors 6 AWG and larger with compression or hy-dent type connectors.
B. Installation – Joints and Connections:
1. Joints, connections, splices, etc, shall be made in a workmanlike manner and
according to manufacturer's directions.
2. Utilize connectors UL listed as required for installation application.
3. Utilize connectors UL listed for damp and wet locations in inground and underground
pull boxes, junction boxes, handholes, and manholes, and other damp and wet
locations.
4. Utilize connectors UL listed for direct burial where connections are direct buried.
5. Aluminum Conductors: Provide crimp on, barrel-to-pigtail adapters where needed for
terminations. Pigtail adapters shall be sized as required to make terminations. Utilize
approved tools to maintain UL listing and CSA certification.
3.08 FIRESTOPPING
A. Apply firestopping to electrical penetrations of fire-rated floor and wall assemblies to restore
original fire-resistance rating of assembly according to Division 07 Section "Penetration
Firestopping."
END OF SECTION
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