The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
SECTION 26 0519
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES
PART 1 - GENERAL
1.1
SUMMARY
A.
Section Includes:
1. System description.
2. Design requirements.
3. 600-volt wire and cable system.
4. Nonmetallic-sheathed cable.
5. Direct burial cable.
6. Service entrance cable.
7. Armored cable.
8. Metal clad cable.
9. Wiring connectors.
10. MWRDGC wire types and terminal lugs schedule.
B.
Related Documents:
1. Applicable provisions of Division 00 – Procurement and Contracting Requirements
shall govern work of this specification section.
C.
Related Sections:
1. Applicable provisions of Division 01 – General Requirements shall govern work of
this specification section.
2. Applicable provisions of MWRDGC General and Detailed Technical Specifications
utilized for this project.
1.2
REFERENCES
A.
MWRD projects located within the City of Chicago limits shall conform to the City of
Chicago Building Code and MWRD projects located outside the City of Chicago limits
shall conform to Federal, State or Local building code requirements adopted by that
specific municipality.
B.
International Electrical Testing Association (IETA):
1. NETA ATS - Acceptance Testing Specifications for Electrical Power Distribution
Equipment and Systems.
C.
National Fire Protection Association (NFPA):
1. NFPA 70 - National Electrical Code.
2. NFPA 262 - Standard Method of Test for Flame Travel and Smoke of Wires and
Cables for Use in Air-Handling Spaces.
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
1.3
SYSTEM DESCRIPTION
A.
Product Requirements: Provide products as follows:
1. Solid conductor for feeders and branch circuits 10 AWG and smaller.
2. Stranded conductors for control circuits.
3. Conductor not smaller than 12 AWG for power and lighting circuits.
4. Conductor not smaller than 16 AWG for control circuits.
5. 10 AWG conductors for 20 ampere, 120 volt branch circuits longer than 75 feet.
6. 10 AWG conductors for 20 ampere, 277 volt branch circuits longer than 150 feet.
B.
Wiring Methods: Provide following wiring methods:
1. Concealed Dry Interior Locations: Use only building wire, Type
THHN/THWN/THHW insulation, in raceway, nonmetallic – sheathed cable, or
metal clad cable as required.
2. Exposed Dry Interior Locations: Use only building wire, Type
THHN/THWN/THHW insulation, in raceway.
3. Above Accessible Ceilings: Use only building wire, Type THHN/THWN/THHW
insulation, in raceway, nonmetallic-sheathed cable or metal clad cable as required.
4. Wet or Damp Interior Locations: Use only building wire, Type THHN/THWN,
XHHW insulation in raceway.
5. Exterior Locations: Use only building wire, Type THHN/THWN, XHHW
insulation in raceway.
6. Underground Locations: Use only building wire, Type THHN, THWN, THHW
insulation in raceway.
1.4
DESIGN REQUIREMENTS
A.
1.5
Conductor sizes are based on copper. Aluminum conductors are not permitted.
SUBMITTALS
A.
1.6
Section 01 3300 - Submittal Procedures: Requirements for submittals.
1. Product Data: Submit wire and each cable assembly type.
2. Samples:
a. Submit one (1) each, 18-inch length of cable assembly from each reel.
b. Select each length to include complete set of manufacturer markings.
c. Attach tag indicating cable size and application information.
3. Design Data: Indicate voltage drop and ampacity calculations for aluminum
conductors substituted for copper conductors.
4. Test Reports: Indicate procedures and values obtained.
CLOSEOUT SUBMITTALS
A.
Section 01 7000 - Execution and Closeout Requirements: Requirements for closeout
submittals.
B.
Section 017839 - Project Record Documents: Record actual locations of components
and circuits.
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
1.7
QUALITY ASSURANCE
A.
Provide wiring materials located in plenums with peak optical density not greater than
0.5, average optical density not greater than 0.15, and flame spread not greater than (5)
five feet when tested in accordance with NFPA 262.
B.
Perform Work in accordance with State and Local codes and related requirements.
1.8
QUALIFICATIONS
A.
1.9
Manufacturer: Company specializing in manufacturing products specified in this
section with minimum five (5) years documented experience.
FIELD MEASUREMENTS
A.
1.10
Verify field measurements are as indicated on Drawings and approved shop drawings.
COORDINATION
A.
Section 01 3115 – Project Coordination and Meetings: Requirements for coordination.
B.
Where wire and cable destination is indicated and routing is not shown, determine
routing and lengths required.
C.
Wire and cable routing indicated is approximate unless dimensioned. Include wire and
cable lengths within 10 feet of length shown.
PART 2 - PRODUCTS
2.1
2.2
600-VOLT WIRE AND CABLE SYSTEM
A.
Reference MWRDGC wire types and terminal lugs schedule at the end of this Section.
B.
General Wire and Cable System:
1. Insulated copper electrical wire, cable, and connections to apparatus, equipment,
and material.
C.
Conductors: Copper.
D.
Insulation: 600 Volt Rating: Thermoplastic material rated not less than 194 Degrees F,
(90 degrees C).
E.
Insulation: NFPA 70;
1. Type THHN/THWN insulation for feeders and branch circuits larger than 14 AWG.
2. Type THHN/THWN insulation for feeders and branch circuits 1/0 AWG and
smaller.
NONMETALLIC-SHEATHED CABLE
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 Volts.
2.3
DIRECT BURIAL CABLE
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 Volts.
C.
Insulation Temperature Rating: 194 degrees F, (90 degrees C).
2.4
SERVICE ENTRANCE CABLE
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 Volts.
C.
Insulation: Type RH RHW RHH/RHW/EPR.
2.5
ARMORED CABLE
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 Volts.
C.
Insulation Temperature Rating: Not less than 194 degrees F, (90 degrees C).
D.
Insulation Material: Thermoplastic.
E.
Conductor Assembly Covering: Lead.
2.6
2.7
METAL CLAD CABLE
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 Volts.
C.
Insulation Temperature Rating: 194 degrees F, (90 degrees C).
D.
Insulation Material: Thermoplastic.
E.
Armor Material: Steel.
F.
Armor Design: Interlocked metal tape.
G.
Jacket: Where required.
WIRING CONNECTORS
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
A.
Split Bolt Connectors:
1. Copper Connectors made of copper all-copper alloy construction, high-mechanical
strength, maximum conductivity and low resistance.
2. Acceptable range for solid and stranded conductors from 16 AWG to 3/0 AWG.
B.
Solder-less Pressure Connectors:
1. High copper alloy terminal.
2. May be used only for cable termination to equipment terminals.
3. Not approved for splicing.
C.
Spring Wire Connectors:
1. Copper, solid/stranded wire.
2. Nylon shell, wing type.
3. 600 Volt.
4. 1000 Volt for Lighting Fixtures, Luminaries and Signage.
5. Wire Size: Type approved for identified applications.
D.
Compression Connectors:
1. Provide for bonding EMT thinwall conduits to electrical junction boxes or
enclosures.
2. Zinc-plated steel type.
3. Insulated.
4. Provide concrete-tight connections when taped and are rated for electrical
applications above 600 volts.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Section 01 3115 – Project Coordination and Meetings: Coordination and project
conditions.
B.
Verify interior of building has been protected from weather.
C.
Verify mechanical work likely to damage wire and cable has been completed.
D.
Verify raceway installation is complete and supported.
3.2
PREPARATION
A.
3.3
Completely and thoroughly swab raceway before installing wire.
EXISTING WORK
A.
Remove exposed abandoned wire and cable, including abandoned wire and cable above
accessible ceiling finishes. Patch surfaces where removed cables pass through building
finishes.
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
B.
Disconnect abandoned circuits and remove circuit wire and cable. Remove abandoned
boxes when wire and cable servicing boxes is abandoned and removed. Install blank
cover for abandoned boxes not removed.
C.
Provide access to existing wiring connections remaining active and requiring access.
Modify installation or install access panel.
D.
Extend existing circuits using materials and methods compatible with existing electrical
installations, or as specified.
E.
Clean and repair existing wire and cable remaining or wire and cable to be reinstalled.
3.4
WIRING METHODS
A.
Control-Wire Connections between apparatus:
1. One (1) continuous length, unless otherwise approved by MWRDGC Engineer.
2. Make terminations at terminal blocks.
3. Partial lengths:
a. Connect with terminal blocks in junction boxes, unless otherwise approved by
the MWRDGC Engineer.
b. Indicate wire numbers on terminal block marker strips.
B.
Splicing:
1. Permitted only within junction boxes, manholes, and handholds.
2. Attach markers on each side of splice to designate the use of the wire.
C.
Training wires through conduits:
1. Use approved lubricant for pulling wires or cables.
2. Allow slack so wires can expand and contract.
3. Leave service loop of wire in each junction box or pull box for future use if
terminated or spliced.
3.5
INSTALLATION
A.
Route wire and cable to meet Project requirements and conditions.
B.
Neatly train and lace wiring inside boxes, equipment, and panelboards.
C.
Identify and color code wire and cable under provisions of Section 26 0553 –
Identification for Electrical Systems. Identify each conductor with its circuit number or
other designation indicated.
D.
Special Techniques - Building Wire in Raceway:
1. Pull conductors into raceway at same time.
2. Install building wire 4 AWG and larger with pulling equipment.
E.
Special Techniques - Cable:
1. Protect exposed cable from damage.
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
2. Support cables above accessible ceiling, using spring metal clips or metal cable ties
to support cables from structure. Do not rest cable on ceiling panels.
3. Use suitable cable fittings and connectors.
F.
Special Techniques - Direct Burial Cable:
1. Trench and backfill for direct burial cable installation. Refer to Section 31 2316 –
Trench, Excavation, Backfill and Compaction.
2. Install warning tape along entire length of direct burial cable, within six (6) inches
of grade.
3. Use suitable direct burial cable fittings and connectors.
G.
Special Techniques - Wiring Connections:
1. Clean conductor surfaces before installing lugs and connectors.
2. Make splices, taps, and terminations to carry full ampacity of conductors with no
perceptible temperature rise.
3. Tape uninsulated conductors and connectors with electrical tape to 150 percent of
insulation rating of conductor.
4. Install split bolt connectors for copper conductor splices and taps, six (6) AWG and
larger.
5. Install solderless pressure connectors with insulating covers for copper conductor
splices and taps, eight (8) AWG and smaller.
6. Install insulated spring wire connectors with plastic caps for copper conductor
splices and taps, 10 AWG and smaller.
7. Terminate aluminum conductors with tin-plated, aluminum-bodied compression
connectors only. Fill with anti-oxidant compound before installing conductor.
8. Install suitable reducing connectors or mechanical connector adaptors for
connecting aluminum conductors to copper conductors.
H.
Install solid conductor for feeders and branch circuits 10 AWG and smaller.
I.
Install stranded conductors for branch circuits 10 AWG and smaller. However, when
stranded conductors are used in lieu of solid, then install crimp on fork terminals for
device terminations. Do not place bare stranded conductors directly under screws.
3.6
WIRE COLOR
A.
General:
1. For wire sizes 10 AWG and smaller, install wire colors in accordance with the
following:
a. Black and red for single phase circuits at 120/240 volts.
b. Black, red, and blue for circuits at 120/208 volts single or three phase.
c. Orange, brown, and yellow for circuits at 277/480 volts single or three phase.
2. For wire sizes eight (8) AWG and larger, identify wire with colored tape at
terminals, splices and boxes.
3. Colors are as follows:
a. Black and red for single phase circuits at 120/240 volts.
b. Black, red, and blue for circuits at 120/208 volts single or three phase.
2012 EDITION
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CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
c. Orange, brown, and yellow for circuits at 277/480 volts single or three phase.
B.
Neutral Conductors: White. When two (2) or more neutrals are located in one (1)
conduit, individually identify each with proper circuit number.
C.
Branch Circuit Conductors: Install three (3) or four (4) wire home runs with each phase
uniquely color coded.
D.
Feeder Circuit Conductors: Uniquely color code each phase.
E.
Ground Conductors:
1. For six (6) AWG and smaller: Green.
2. For four (4) AWG and larger: Identify with green tape at both ends and visible
points including junction boxes.
3.7
3.8
FIELD QUALITY CONTROL
A.
Section 01 4000 - Quality Requirements: Field inspecting, testing, adjusting, and
balancing.
B.
Inspect and test in accordance with NETA ATS, except Section 4.
C.
Perform inspections and tests listed in NETA ATS, Section 7.3.1.
MWRDGC WIRE TYPES AND TERMINAL LUGS SCHEDULE
(See Next Page)
2012 EDITION
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LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES
The Metropolitan Water Reclamation District of Greater Chicago
General Specifications
WIRE TYPES AND TERMINAL LUGS
Power Wire
REQUIREMENTS
SIZE
TYPE
No. 6 AWG and smaller
Stranded type THHN/THWN
No. 4 AWG and larger
Stranded type XHHW
Control Wire
No. 14 AWG or larger
Stranded type THHN/THWN
Lighting Wire
No. 12 AWG
Solid single conductor type
THHN/THWN
Panel Wire
No. 14 AWG/7 strand type
SIS switchboard wire, 90
degrees C, 600 volts
Terminal Lugs (b)
Ends of wires smaller than No.
4 AWG
One-hole, solderless, pressure
type, copper
Ends of wires larger than No.
4 AWG
One-hole, compression type,
copper, insulation sealing
collars
(b) 1. Open-spade type not permitted.
1.
2.
Not required for equipment with screw compression terminations, such as molded-case
air circuit breakers.
Insulate for dielectric strength 2.5 times normal potential of the circuit when the spacing
between studs on apparatus is small enough that lugs can touch each other if they turn.
END OF SECTION
2012 EDITION
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CONDUCTORS AND CABLES