HomeMy WebLinkAbout071 260519A - Low-Voltage Electrical Power Conductors and CablesWegmans Food Markets LOW-VOLTAGE ELECTRICAL Section 260519
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SECTION 260519 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Copper building wire rated 600 V or less.
2. Metal-clad cable, Type MC, rated 600 V or less.
3. Tray cable, Type TC, rated 600 V or less.
4. Connectors, splices, and terminations rated 600 V and less.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product.
B. Product Schedule: Indicate type, use, location, and termination locations.
PART 2 - PRODUCTS
2.1 COPPER BUILDING WIRE
A. Conductors, Copper:
1. Annealed copper, 98 conductivity.
2. Minimum size:
a. #12 AWG: Branch and other circuits.
b. #14 AWG: Signal circuits under 50 volts AC and motor control circuits.
3. Wire and cable shall be stranded for sizes greater than #16 AWG. Provide solid for
smaller sizes unless otherwise noted.
B. Insulation:
1. Type: Dual-rated THHN/THWN
a. 600 volt insulation for all building wire, feeders, and branch wiring.
b. Rated 70°C wet, 90°C dry.
c. Polyvinyl chloride (PVC) insulation with nylon jacket.
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2. Type: XHHW
a. 600 volt insulation for all building wire, feeders, and branch wiring.
b. Rated 90°C wet or dry.
c. Polyethylene (XLP) insulation.
C. Color Coding:
1. All circuits shall be color coded according to the following schedule:
CONDUTOR INSULATION COLOR CODING SCHEDULE
THREE PHASE THREE PHASE ONE PHASE
PHASE 120/208 VOLT 277/480 VOLT 120/240 VOLT
Ground Green Green Green
Neutral White Grey White
A or L1 Black Brown Black
B or L2 Red Orange Red
C or L3 Blue Yellow ---
2. Size #8 AWG and larger may be identified by colored tape band.
a. Provide minimum 3-inch color banding.
b. Provide color band identification in pull points, boxes, terminations, enclosures,
equipment, etc.
3. Signal circuits shall be color coded using solid colors with contrasting tracer color lines.
a. Where green is used, green shall be the equipment grounding conductor.
4. Switched legs for branch circuit lighting shall have identifying marker with insulation
color same color as phase leg.
5. Conductors shall be labeled with UL seal and be marked with manufacturer name, wire
size, and insulation type.
D. Make:
1. Acceptable manufacturers:
a. Allied Wire & Cable
b. CME Wire & Cable
c. Encore Wire
d. Houston Wire & Cable
e. Nexans
f. Okonite
g. Omni Cable
h. Southwire
i. USA Wire & Cable
2. All wire and cable shall be of the same manufacturer.
2.2 LUMINAIRE RACEWAY WIRE
A. Luminaires that meet the requirements for code approved raceways may be used to carry the
branch circuit conductors supplying the luminaires as allowed by NEC.
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B. Provide branch circuit conductors recognized for use at temperatures 90°C (194°F) or higher.
C. Conductors shall be labeled with UL seal and be marked with manufacturer name, wire size,
and insulation type.
D. Make: Same make as building wire.
2.3 METAL-CLAD CABLE – TYPE MC – 600 VOLT
A. General Requirements:
1. 98% conductivity, stranded, copper conductors.
2. Constructed in accordance with latest revision of applicable IPCEA Specifications for
600 volt cable for grounded neutral wye system.
3. 90°C conductor temperature rating (U.L. Standard 1569).
4. Shall be unused and not over six months old.
5. Cable shall meet requirements of NEC article 334.
B. Construction:
1. Conductor size: #14-#10 strand.
2. Three or four conductor.
3. Minimum insulation thickness, ethylene propylene rubber.
4. Interstice filled with suitable filler and code size copper ground wires.
5. Phase identification by numeral or color.
6. Binder tape overall.
7. Single strip positively interlocked galvanized steel armor tape overall.
C. Length:
1. Cable lengths as determined by actual field measurements.
2. Allow sufficient length for terminations, vertical drops, cable within equipment, etc.
D. Color Coding:
CONDUCTOR COLOR CODING SCHEDULE
NUMBER OF
CONDUCTORS 120/208 VOLT 277 VOLT 277/480 VOLT
2 conductor black/white gray/orange
gray/yellow
gray/brown
3 conductor black/white/red brown/orange/gray
orange/yellow/gray
brown/yellow/gray
4 conductor black/white/red/blue brown/orange/yellow/gray
E. Make:
1. AFC
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2. Alliance
3. Correclad
4. Southwire
2.4 TRAY CABLE, TYPE TC
A. Construction:
1. Copper only conductor with additional copper ground, as required for branch circuit.
2. Use type TC, PVC, 90°C, color coded conductor insulation.
3. 600V, THHN type insulation.
4. PVC jacket extruded over circuit conductors.
5. Conductor quantities as noted on Contract Drawings.
6. Conductors shall be labeled with UL seal and be marked with manufacturer name, wire
size, and insulation type.
B. Make:
1. Allied Wire & Cable
2. Basic Wire and Cable
3. Encore Wire
4. Houston Wire and Cable
5. Nexans
6. Okonite
7. Omni-Cable
8. Southwire
9. USA Wire & Cable
2.5 CORD DROP CABLE
A. Copper conductors.
B. Color code per IPECA.
C. Type SJO with 90°C thermoset insulation rated 300 volts or type SEOW with 90°C
thermoplastic elastomer insulation rated 600 volts. Use type as noted on Contract Documents.
D. Conductors shall be labeled with UL seal and be marked with manufacturer name, wire size,
and insulation type.
E. Make:
1. General Cable
2. Okonite
3. Southwire
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2.6 CONNECTIONS, LUGS, TERMINALS – COPPER CABLES
A. Connectors, lugs, and terminals shall be UL listed per UL486A, using industry standard
crimping tools.
B. Straight splices #22 AWG to #8 AWG.
1. Solderless nylon insulated butt splices, copper.
2. Design Make: Thomas & Betts “Sta-Kon”
3. Make:
a. Burndy
b. Ideal
c. Thomas & Betts
C. Straight Splices #8 AWG and Larger:
1. Solderless, two-way compression type, long barrel splice, copper body.
2. Provide heat shrink tubing insulation over each splice then tape.
3. Design Make: Thomas & Betts 54800 Series.
4. Make:
a. Burndy
b. Thomas & Betts
D. Pigtail splices for conductors up to and including #8 AWG.
1. Solderless pressure connectors for taps and pigtail splices.
2. Connectors shall be “Wing-Nut” type, U.L. approved as 600 volt pressure cable
connectors, with a 105°C rating.
3. Make:
a. Buchanan
b. Ideal; design make as listed below.
Catalog No. Wire Size
451 2 #18 min; 1 #12 max.
452 2 #14 or 4 #16 min; 1 #10, 2 #12 max.
453 1 #10, 1 #12 or 3 #12 min; 2 #8, 1 #6 or 2 #6, 1 #12 max.
455 3 #12 min; 4 #10 max.
c. Skotchlock
E. Connectors for three-way splice, #6 AWG and larger.
1. Solderless compression type, copper body.
2. For 500 MCM size, provide two (2) in parallel.
3. Design make: Thomas & Betts 54700 Series.
4. Make: Burndy YS-T or approved equal.
F. Connectors for termination copper conductors, 600 volts and under.
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1. Size #6 AWG to size 2/0, long-barrel copper body, indent type, one hole lug.
2. Size 3/0 and larger, long-barrel copper body, indent type, two hole lug.
3. Design make (one hole): Thomas & Betts 54900 Series.
4. Design make (two hole): Thomas & Betts 54800 Series.
5. Make:
a. Anderson
b. Burndy
c. Thomas & Betts
G. Terminating lugs for control wiring.
1. Vinyl or nylon insulated, locking fork, solderless compression terminals for sizes 26
AWG to 10 AWG.
2. Nylon insulated ring solderless, compression terminals for sizes 8 AWG through size 1.
3. Larger sizes – as called for above.
4. Design make: Thomas & Betts “Sta-Kon”
5. Make:
a. Burndy
b. Thomas & Betts
2.7 TERMINATING DEVICES OR CABLES
A. Provide metal clad cable fittings for nonjacketed interlocked armor cables.
1. Watertight type, malleable iron body, suitable for entry into box or enclosure.
2. Neoprene bushing to establish water stop and grounding sleeve.
3. Verify size of all applications and indicate correct size selection on submittals.
4. Design make: Thomas & Betts Series 10000 for nonjacketed.
5. Make:
a. Crouse Hinds
b. OZ Gedney
c. PLM
d. Thomas & Betts
PART 3 - EXECUTION
3.1 INSTALLATION OF CONDUCTORS AND CABLES
A. Conceal cables in finished walls, ceilings, and floors unless otherwise indicated.
B. Complete raceway installation between conductor and cable termination points according to
Section 260533 "Raceways and Boxes for Electrical Systems" prior to pulling conductors and
cables.
C. Use manufacturer-approved pulling compound or lubricant where necessary; compound used
must not deteriorate conductor or insulation. Do not exceed manufacturer's recommended
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maximum pulling tensions and sidewall pressure values. Do not use oil or grease based
lubricants.
D. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that will
not damage cables or raceway.
E. Install exposed cables parallel and perpendicular to surfaces of exposed structural members, and
follow surface contours where possible.
F. Support cables according to Section 260529 "Hangers and Supports for Electrical Systems."
G. Complete cable tray systems installation according to Section 260536 "Cable Trays for
Electrical Systems" prior to installing conductors and cables.
3.2 GENERAL REQUIREMENTS
A. Install splices and connections inaccessible outlets, pullboxes, or junction boxes using
connector types called for.
B. Insulate splices, taps, and connections with U.L. labeled gauge plastic tape or molded
composition caps.
C. Coil slack wires at outlets, inside the outlet boxes and seal the outlet opening with cardboard or
fiber plug to prevent entrance of concrete, plater, or paint.
D. Tag feeders, subfeeders, special system wiring and control wiring in each pullbox and gutter
space, denoting points of origin and termination of wires.
E. Install a maximum of three phase conductors, one neutral conductor, plus ground conductor, in
any one feeder or branch circuit conduit unless otherwise called for.
F. Provide supports for conductors in vertical raceways in accordance with NEC Article 300.
G. Flexible conduit used as connection to equipment shall contain separate green grounding wire
run back to ground bus or lugs of serving panelboard or protective device enclosure.
H. Identify circuit conductors of systems in accessible boxes and at terminations with proper color
code, properly phased.
I. Provide stranded wire to motors, transformers, equipment, or vibrating machinery.
J. Verify panelboard, receptacle, or other device lug sizes prior to termination of conductor.
Where a conductor is sized larger than the lug, provide insulated in-line splice to reduce
conductor size to match device or breaker terminations.
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3.3 ENVIRONMENTAL REQUIREMENTS FOR CONDUCTORS
A. Wire type THHN/THWN shall be utilized in environments where the average ambient
temperature is greater than 32 degrees F.
B. Wire type XHHW shall be utilized in environments where the average ambient temperature is
less than 32 degrees F.
3.4 METAL CLAD CABLE – TYPE MC 600 VOLT
A. Install cable in continuous lengths between termination points and at locations called for.
B. Do not bend sharper than ten times outside diameter at any time.
C. Continuous support in cable tray and at 4 1/2 foot intervals where not in cable tray and within
12 inches of every box and fitting.
D. Provide mechanical protection in areas where possible mechanical damage may occur.
E. Install in accordance with manufacturer’s recommendations.
F. Do not exceed maximum pulling tension.
G. Terminations and splices adequately supported and made up within code sized boxes.
H. Use clamps to secure cable but do not crush jacket or armor.
I. MC Cabling shall not exceed 3’ in exposed ceiling area (sales floor). MC cabling is permitted to
be installed to any length in walls, areas with drop ceilings and above walk in coolers and
freezers. MC cabling installed shall be installed in a neat and workman like manner.
3.5 TRAY CABLE, TYPE TC
A. Provide within cable tray and where called for.
B. Meet all requirements of NEC.
C. Lay conductors in neat and orderly manner and tag every cable when it enters or leaves tray.
D. Provide junction boxes mounted to side of tray for termination of branch conduit and change
from tray cable (TC) to building wire (THHN).
3.6 CORD DROP CABLE
A. Verify actual number of conductors plus spare before ordering cable.
B. Do not exceed pulling tensions of cable. Provide kellum grips to limit strain connection into
junction box or bus plug.
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C. Use a green conductor in the cable for ground.
3.7 CONNECTION AT UTILITY TRANSFORMER
A. Maintain air clearances between energized live parts and between live parts and ground for
exposed connections in accordance with manufacturer recommendations.
B. Bundle associated phase, neutral, and equipment grounding conductors together within
transformer enclosure. Arrange conductors such that there is not excessive strain that could
cause loose connections. Allow adequate slack for expansion and contraction of conductors.
C. Provide (4) heavy duty cable rack support channels; nonmetallic. Components fabricated from
nonconductive, fiberglass polymer. Locate evenly spaced at the base of the transformer
opening.
D. Coordinate with utility company.
3.8 MAXIMUM BRANCH CIRCUIT LENGHTS
A. The voltage drop schedule on contract drawings indicates the maximum installed length a
circuit can have and still maintain an adequate voltage level at the last point of use. If the circuit
length exceeds the length listed, use the next largest wire size. Multiple circuit runs in the same
raceway shall have all conductors sized the same based on worst case circuit lengths. In all
cases, voltage drop for any circuit shall not exceed 5%. Contractor to test each circuit and
submit tabulated results to Owner’s Representative.
3.9 SLEEVE AND SLEEVE-SEAL INSTALLATION FOR ELECTRICAL PENETRATIONS
A. Install sleeves and sleeve seals at penetrations of exterior floor and wall assemblies. Comply
with requirements in Section 260544 "Sleeves for Electrical Raceways and Cabling."
3.10 FIRESTOPPING
A. Apply firestopping to electrical penetrations of fire-rated floor and wall assemblies to restore
original fire-resistance rating of assembly according to Section 078413 "Penetration
Firestopping."
3.11 FIELD QUALITY CONTROL
A. Perform tests and inspections.
1. Perform each of the following visual and electrical tests:
a. Compare conductor and cable data with drawings, specifications and submittals.
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b. Inspect exposed sections of conductor and cable for physical damage and correct
connection according to the single-line diagram.
c. Inspect compression-applied connectors for correct cable match and indentation.
d. Inspect for correct identification and arrangements.
e. Inspect cable jacket and condition.
f. Continuity test on each conductor and cable, including opens, shorts and grounds.
g. Uniform resistance of parallel conductors.
B. Cables will be considered defective if they do not pass tests and inspections.
C. Prepare test and inspection reports to record the following:
1. Procedures used.
2. Results that comply with requirements.
3. Results that do not comply with requirements, and corrective action taken to achieve
compliance with requirements.
END OF SECTION 260519