Download Low-Voltage Electrical Power Conductors and Cables

Exhibit A-1
Consumers Energy
SECTION 26 05 19
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES
PART 1 GENERAL
1.1
1.2
SUMMARY
A.
Section includes building wire and cable; nonmetallic-sheathed cable; armored cable;
metal clad cable; and wiring connectors and connections.
B.
Related Sections:
1.
Section 26 05 53 - Identification for Electrical Systems: Product requirements for
wire identification.
REFERENCES
A.
1.3
1.4
International Electrical Testing Association:
1.
NETA ATS - Acceptance Testing Specifications for Electrical Power
Distribution Equipment and Systems.
SYSTEM DESCRIPTION
A.
Product Requirements: Provide products as follows:
B.
Wiring Methods: Provide building wire for all locations unless otherwise specified.
DESIGN REQUIREMENTS
A.
All drawings and specification sections apply to work in this section. Furnish all items,
articles, materials, equipment, operations or methods that are mentioned, listed or
scheduled on drawings or are in this specification including all labor, equipment,
materials and miscellaneous incidentals necessary and/or required for the completion of
this project. The work covered under this section of the specifications is in no way
complete within itself but is supplementary to the entire specification and drawings.
B.
Conductor shall be copper unless explicitly approved by Owner.
C.
Indicated wire sizes are based on current, approved, NEC, voltage drop and no more than
three conductors per raceway. Larger size wire may be required if the Contractor elects to
use higher conduit fill or at his option may be used to utilize stock sizes. Raceway sizes
shall be increased accordingly to conform to the current, approved, NEC requirements.
Changes shall be approved by Owner.
1.
Voltage drop shall be limited to:
a.
3% on feeders
b.
2% on branch circuits
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Exhibit A-1
Consumers Energy
D.
1.5
1.6
CLOSEOUT SUBMITTALS
A.
Project Record Documents: Record actual locations of components and circuits.
B.
Red line drawings when wire is added to existing conduits larger than 2”.
QUALIFICATIONS
A.
1.7
Manufacturer: Company specializing in manufacturing products specified in this section
with minimum three years of experience.
FIELD MEASUREMENTS
A.
1.8
Manufacturer’s name, type, and wire size shall be permanently marked on the outer
covering at regular intervals and delivered in complete coils or reels
Verify field measurements are as indicated on Drawings.
COORDINATION
A.
Section 01 30 00 - Administrative Requirements: 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.
PART 2 PRODUCTS
2.1
2.2
Conductors
A.
Product Description:
1.
Type THHN/THWN for all locations, unless noted or specified otherwise.
2.
Type XHHW for all locations outside of the structure footprint.
3.
Feeders, branch and control circuit wiring shall be Stranded conductor.
4.
Power and lighting circuits shall not be smaller than 12 AWG unless otherwise
specified.
5.
20 ampere, 120 volt branch circuits longer than 100 feet shall not be smaller than
10 AWG unless otherwise specified.
6.
Control circuit wiring shall not be smaller than 18 AWG unless otherwise
specified.
B.
Conductor: Copper.
NONMETALLIC-SHEATHED CABLE
A.
Not permitted.
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Exhibit A-1
Consumers Energy
2.3
2.4
2.5
ARMORED CABLE
A.
Conductor: Copper.
B.
Insulation Voltage Rating: 600 volts.
C.
Insulation Temperature Rating: 90 degrees C.
D.
Insulation Material: Thermosetting.
E.
Conductor Assembly Covering: Lead.
F.
Connectors: Pin and Socket with safety keying to prevent accidental mating of different
voltage components.
G.
UL Listed.
METAL CLAD CABLE
A.
Not allowed, except with explicit permission from Owner.
1.
Allowed for final termination to vibrating mechanical equipment, less than 6 foot
total length.
B.
Conductor: Copper.
C.
Insulation Voltage Rating: 600 volts.
D.
Insulation Temperature Rating: 90 degrees C.
E.
Insulation Material: Thermosetting.
F.
Armor Material: Steel.
WIRING CONNECTORS
A.
Power Cable Lugs:
1.
For #8 AWG through 12# AWG conductors, use seamless, tubular, tin or silver
plated copper, with one hole in the tongue and designed for multiple facet single
compression.
2.
For #6 AWG and larger conductor, use seamless tubular, silver or tin plated
copper, long barrel closed end, multiple compression, with one hole for #6 AWG
to #2 AWG. Two-hole for #1 AWG and larger. (NEMA standard drilling unless
otherwise specified.)
3.
Splices and connections for #6 AWG and larger shall be manufactured with
silver or tin plated copper. Multiple facet type multiple compression, long barrel
type connectors.
4.
Lugs for control wiring #14 AWG through #22 AWG shall be nylon insulated,
silver or tin plated copper, multiple facet type single compression, ring tongue
type.
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Exhibit A-1
Consumers Energy
5.
6.
7.
Lugs shall be of the manufacturer and type indicated listed in this section.
Pre-insulated twist-on type connectors for #12 AWG and #10 AWG conductors
splices and taps may be used at contractor’s option.
Light pole bases shall utilize Polaris pre-terminated terminal blocks within base.
B.
Terminal Blocks
1.
Terminal blocks shall be NEMA type, 600 volt, suitable for ring or spade lugs.
C.
Split Bolt Connectors:
1.
Only to be used while bonding basket-style cable tray. Other uses require
explicit approval from Owner.
D.
Solderless Pressure Connectors:
1.
Spring Wire Connectors:
a.
Any manufacturer, excluding Skotchlok.
2.
Compression Connectors:
a.
Owner preferred option.
PART 3 EXECUTION
3.1
3.2
EXAMINATION
A.
Section 01 30 00 - Administrative Requirements: 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 before installing conductors.
PREPARATION
A.
3.3
Completely and thoroughly swab raceway before installing wire.
INSTALLATION
A.
Route wire and cable to meet Project conditions.
1.
Routing shall be run orthogonal to building space.
2.
Multi-wire branch circuits with shared neutrals are not permitted
B.
Neatly train and lace wiring inside boxes, equipment, and panelboards.
C.
Cables shall be continuous between terminations unless otherwise specified on the
Drawing. If splices are necessary, the method and location shall be approved by the
Owner or Owner’s Representative.
D.
Wire in Raceway:
1.
Pull all conductors into raceway at same time.
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Exhibit A-1
Consumers Energy
2.
3.
4.
3.4
Do not use pulling means which could damage the raceway or the wire.
Make all splices in a junction box, never inside conduit or panelboards, MCCs,
switchgear or similar equipment.
No more than 6 single phase branch circuits in a single conduit.
E.
Cable:
1.
Protect all exposed cable from damage in accordance with Section 26 05 33.
2.
Support cables above accessible ceiling, from building structure.
a.
Attach to building by means of listed and labeled components.
b.
Do not rest cable on ceiling panels.
c.
Do not attach cables to ceiling suspension system by means of plastic ties
or spring clips.
3.
Use suitable cable fittings and connectors.
F.
Controls cables:
1.
Fire Detection system:
a.
Color of outer sheath: Red.
b.
For the low voltage portion of the fire alarm system, install 16 AWG
conductors (minimum) for signature loop and 14 AWG conductors
(minimum) for signal circuits. Conductors shall have 75 degree C
insulation for wet, damp, or dry locations.
c.
All cable shall be rated for the environment where it shall be used: Power
limited fire-protective signaling cable classified for fire and smoke
characteristics, copper conductor, 300 volts insulation rated 105 degrees
C.
G.
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 compression type connectors for copper conductor splices and taps, 8
AWG and larger.
5.
Install insulated spring wire connectors with plastic caps for copper conductor
splices and taps, 10 AWG and smaller.
6.
Install Polaris pre0insulated terminal blocks at all light pole bases.
H.
MC cable shall only be used for:
1.
Final termination to equipment and devices less than 6’ in length
2.
A manufacturer’s lighting modular wiring system may be used throughout a
room or other defined space.
3.
Other uses require explicit permission from Owner
WIRE COLOR
A.
Identify and color code wire and cable under provisions of Section 26 05 53. Identify
each conductor with its circuit number or other designation indicated.
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Exhibit A-1
Consumers Energy
PART 4 FIELD QUALITY CONTROL
A.
Inspect wire and cable for physical damage and proper connection.
B.
Measure tightness of bolted connections and compare torque measurements with
manufacturer's recommended values.
C.
Verify continuity of each branch circuit conductor.
D.
Perform insulation testing on all feeders prior to energization. Resistance values shall be
recorded and provided to Owner.
1.
Gas & Electric generation and distribution sites shall have conductor tested upon
delivery. Values shall be recorded prior to installing cable or wire in raceway.
END OF SECTION
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