section 16100 wiring methods
Caltrain Standard Specifications
SECTION 16100
WIRING METHODS
PART 1 - GENERAL
1.01
DESCRIPTION
A.
1.02
Section includes requirements for wire and cable of 600 volts or less.
REFERENCE STANDARDS
A.
California Code of Regulations (CCR):
1.
B.
National Fire Protection Association (NFPA):
1.
C.
1.03
Title 24, Part 3, California Electrical Code
NFPA 70
National Electrical Code (NEC)
Underwriters Laboratories Inc. (UL):
1.
UL 83
Thermoplastic-Insulated Wires and Cables
2.
UL 969
Marking and Labeling Systems
3.
UL 1569
Metal-Clad Cables
4.
UL 1581
Reference Standard for Electrical Wire, Cable and
Flexible Cord
SUBMITTALS
A.
Refer to Section 16000, Basic Electrical Requirements, for additional submittals
and submittal requirements.
B.
Submit manufacturer’s product data for wires and cables, wire connectors,
insulating tape, wire markers, and miscellaneous wiring materials.
C.
Submit test procedures for verification of circuit operation.
D.
Submit results of tests and verification of testing of all electrical systems and
circuits.
PART 2 – PRODUCTS
2.01
LABELING AND MARKERS
A.
Conductors shall be delivered to the job site plainly marked on 24-inch centers.
Markings on cables shall be white lettering with black jacketing for conductor
sizes of No. 6 and larger. Indentations for lettering are not acceptable. Markings
shall be as follows:
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Caltrain Standard Specifications
2.02
1.
Per UL 969
2.
Gauge
3.
Voltage
4.
Kind of Insulation
5.
Name of Manufacturer
6.
Trade Name
B.
Conductor labels shall be with PVC tubing with machine printed black marking.
Tubing shall be sized to fit conductor insulation. Adhesive strips are not
acceptable.
C.
Power and Control Conductors Markers or Labels: Plastic-coated, self sticking
markers such as Thomas & Betts E-Z Code or Brady “Perma Code”, or fieldmarked labels such as manufactured by Panduit. Label shall be permanent and
non-handwritten.
CONDUCTORS
A.
Conductors shall be sized according to American Wire Gauge (AWG). Stranding,
insulation, rating, and geometrical dimensions shall conform to UL Specifications
and bear the label of a nationally recognized testing laboratory.
B.
Wire and cable for secondary power, lighting and control circuits shall be rated
for 600 V. Use wire with following types of insulation at the specified locations:
1.
Dry Locations: Type THHN/THWN or XHHW
2.
Wet locations: Type XHHW-2
3.
Branch Circuits within 3 inches of Fluorescent Lamp Ballasts: Type
XHHW or Type THHN (Applies to fixtures where circuit wiring is in same
compartment with ballasts).
4.
Minimum 75 degrees C temperature rated insulation on conductors,
except minimum 90 degrees C temperature rated insulation on
conductors in conduits exposed on roof or wet locations.
5.
Conductors for general wiring: Thermoplastic insulation rated for 600V
manufactured in accordance with UL 83. Copper conductors, 3/4 hard
drawn. Cable sizes No. 8 AWG or larger shall be stranded conductors.
6.
At Motors and Other Applications Where Subject to Vibration: Stranded
conductors.
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Caltrain Standard Specifications
2.03
2.04
600 VOLT METAL CLAD CABLE (MC)
A.
Lightweight, interlocked steel galvanized armor sheath applied over the
cable core ion accordance with UL 1569 and NEC Article 330.
B.
Cable shall have the required number of conductors and shall include a
separate, internal ground conductor, no smaller than indicated on the
Drawings.
Ground conductor shall meet NEC requirements for
equipment grounding conductor.
C.
MC cable assembly shall be rated for 90 Degrees Celcius in wet and dry
locations.
D.
Color coding for conductors shall be as specified in paragraph 3.01
below.
600 VOLT SERVICE DROP CABLE
A.
2.05
PULLING LUBRICANT
A.
Wire pulling lubricant shall be a wire pulling compound approved by a nationally
recognized testing laboratory.
1.
2.06
Service drop cable shall be triplexed, aluminum conductor, 600 volt
rated, with 75 Degrees Celcius polyethylene insulation. Messenger wire
shall be all aluminum conductor (AAC). Conductor sizes shall be as
indicated on the Contract Drawings.
Aqua Gel II, as manufactured by Ideal Industries, Sycamore, IL, or
Engineer approved equal.
WIRING MATERIALS
A.
Connectors for Copper Conductors No. 10 AWG and Smaller:
1.
Pre-insulated Spring Pressure Type: Scotchlok Types Y, R, G and B; Ideal
“Wing Nut”; T & B Series PT, or equal.
2.
Splice Cap Type: Un-insulated metal cap applied with proper indenter
tool which provides deformation of cap in 2 directions at right angles to
each other, Buchanan, or Engineer approved equal.
B.
Connectors for Fixture Leads: Pre-insulated spring pressure type as specified
above for conductors; or set screw type, Marr, Ideal, or Engineer approved
equal.
C.
Connectors and Lugs for Copper Conductors No. 8 AWG and Larger:
Compression type, Burndy, Dossert, T & B, or Engineer approved equal.
D.
Watertight Splice Kits: Epoxy resin type, suitable for the type, size and number
of conductors being spliced.
E.
Splicing and Insulating Electrical Tape (600 V and Below): General purpose
electrical tape shall be suitable for temperatures from 18 deg C to 105 deg C and
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Caltrain Standard Specifications
shall be black, ultraviolet proof, self extinguishing, 7 mil thick vinyl.
F.
Washers:
1.
Flat washer: Mild steel, tin plated, and slightly larger than Belleville
washer.
2.
Belleville washer: Either hardened or tempered steel or stainless steel.
PART 3 – EXECUTION
3.01
WIRING METHODS
A.
B.
General Requirements:
1.
Use No. 12 AWG or larger wire for light and power circuits and No. 14
AWG or larger wire for control circuits, unless smaller wire is specified or
shown.
2.
Unless otherwise specified or shown, leave at least 9 inches of free
conductors at each unconnected outlet. Tape free ends of conductors
and coil neatly in outlet box.
3.
All cable conductors of 3-phase circuits of single-phase shall be of the
same type. Mixing stranded conductors for some phases with others as
solid is not acceptable.
Splicing and Termination of Conductors:
1.
2.
September 30, 2011
Conductors No. 10 AWG and Smaller:
a.
Twist conductors together to be electrically and mechanically
secure by means of pre-insulated spring pressure connectors or
un-insulated splice caps applied with proper indenter tool
designed for the specific type of cap used. Twist conductors
together before applying splice caps.
b.
Insulate splices, joints and free ends of conductors with
insulation equivalent to that of conductors by taping with rubber
and friction tapes, or with high dielectric strength plastic tape.
c.
If splice caps are used, plastic insulating caps may be used.
After applying splice caps, use insulating caps rated for the
temperatures to which they may be subjected, and install as
recommended by the manufacturer.
Conductors No. 8 AWG and Larger:
a.
Splice and terminate conductors by means of compression
connectors and compression terminal lugs.
b.
Do not use split bolt type connectors.
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Caltrain Standard Specifications
3.
C.
c.
After initial set has been taken, retighten all pressure type
connectors and lugs.
d.
Insulate all splices, joints, and free ends of conductors as
specified on this Section.
e.
Where aluminum lug is bolted with steel or copper bolt, use
Belleville spring washer and flat washer.
Underground Splices: Conductor and cable splices installed underground
in manholes, pull boxes and similar locations, shall be made watertight.
Splices for lead-sheathed cables shall be wiped lead joints. Approved
splice kits may be used for conductors and cables other than leadsheathed.
Color Coding:
1.
Color code for general wiring as follows:
a.
For 240/120V, 1-phase system:
Phase A: Black
Phase B: Red
Neutral: White
b.
For 240/120V and 208/120V, 3-phase system:
Phase A: Black
Phase B: Red
Phase C: Blue
Neutral: White
c.
For 480/277V, 3-phase system:
Phase A: Brown
Phase B: Orange
Phase C: Yellow
Neutral: Gray
d.
Ground conductors:
i.
Bare copper conductor may be used for equipment
ground only.
ii.
Insulated ground conductors:
Ground conductor: Green
Isolated ground conductor: Green with white stripe
2.
Use green color for any conductor intended solely for equipment
grounding, unless it is bare.
3.
Use wire with insulation of required color. For other types of wire, which
may not be available in specified colors, use self-adhesive wrap-around
cloth type markers of solid colors to color code conductors.
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Caltrain Standard Specifications
4.
D.
3.02
Where wire markers are used for color coding, mark each conductor at
all accessible locations (panelboards, junction boxes, handholes, auxiliary
gutters, outlets, switches, control centers and similar devices).
Conductor Identification:
1.
Feeders: Identify with the corresponding circuit designation
overcurrent device and load ends, at all splices, and in pull boxes.
at
2.
Branch circuits: Identify with corresponding circuit designation at
overcurrent device and at all splices.
3.
If more than one white (neutral) conductor is present, mark each with all
related circuit numbers.
4.
Control Wires: Identify with indicated number and or letter designation
at all terminal points and connections, including manufacturer pre-wired
control sections and cabinets.
5.
Alarm and Detection Wires: Identify with indicated wire and mnemonics
numbers at all connections, terminal points, and coiled conductors within
cabinets.
6.
Identify power and control conductors using markers or field-marked
labels.
INSTALLATION
A.
Use approved specified wire pulling lubricant. Do not use oil, grease, or similar
indiscriminate substances to facilitate the pulling in of conductors.
B.
Pull wire into conduits with care and prevent damage to insulation. Use basket
pulling grips to avoid slipping of insulation on conductors.
C.
Do not use blocks, tackle, or other mechanical means to pull wires No. 8 AWG, or
smaller.
D.
When pulling conductors, do not exceed manufacturer’s recommended pull
tension values.
E.
Dress harness all wire and cable to prevent mechanical stress on electrical
connections. No wire and cable shall be supported by a connection point.
F.
Correct the following conditions: Deformed, brittle, or cracked insulation;
insulation shrunk or stripped further than 1/8 inches away from the actual point
of connection; cold solder joints, flux joints, and solder splatter; ungrommeted,
unattached or uninsulated wire or cable entries; and deformation of improper
radiusing of wire or cable, especially coaxial cable.
G.
Install cable with a bend radius not less than that recommended by cable
manufacturer. Provide a box loop for all wire and cable routed through junction
boxes or distribution panels.
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Caltrain Standard Specifications
3.03
H.
Remove debris and moisture from raceways, boxes, and cabinets before
installing wire or cable.
I.
Install MC cable at locations indicated on the Contract Drawings or at other
locations approved by the Engineer.
J.
Service drop cable shall be used only for temporary lighting installation and at
other temporary installations as approved by the Engineer.
FIELD QUALITY CONTROL
A.
Prior to operating test, the Field Engineer shall verify that all wiring and
connections are done, all circuits are active and working properly, motor phases
are wired properly, electrical switches are in the right direction, and that overall
the system is ready for application of power and testing.
B.
Operating Test: After installation has been completed, conduct an operating
test. Demonstrate that equipment operates in accordance with the requirements
of this Section. Furnish necessary instruments and personnel required for test.
END OF SECTION
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WIRING METHOD
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