600 Volt Wires and Cables

2.1.3.1

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NOTE: Type THW insulation can only be obtained in

large quantity. Use of this type of insulation is

not recommended for smaller projects. Types USE and

THW are larger than THWN insulation. When they are

allowed ensure that the conduit has been properly

sized for the number of THW or USE wires indicated

in each conduit run.

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Service entrance and direct buried conductors shall conform to UL 854, Type

USE. Conductors in conduit other than service entrance shall conform to UL

83, Type THWN [or THW]. Conductor size and number of conductors in each

cable shall be as indicated. Conductors shall be color coded. Conductor

identification shall be provided within each enclosure where a tap, splice,

or termination is made. Conductor identification shall be by color-coded

insulated conductors, plastic-coated self-sticking printed markers, colored

nylon cable ties and plates, or heat shrink type sleeves. Control circuit

terminations shall be properly identified. Conductors No. 10 AWG and

smaller shall be solid copper. Conductors No. 8 AWG and larger shall be

stranded copper. [All conductors shall be copper.] [Conductors No. 6 AWG

and smaller shall be copper. Conductors No. 4 AWG and larger shall be

either copper or aluminum, at the Contractor's option. Should the

Contractor opt to use aluminum, he shall be responsible for meeting the

requirements of the following paragraph, "Aluminum Conductors."] [As an

exception to the preceding statement, do not substitute aluminum for copper

if the equivalent aluminum size would exceed 500 KCMIL.]

a.

Colors for coding conductors shall be:

208-VOLT SYSTEM

480-VOLT SYSTEM

Neutral - White

Phase A - Black

Phase A - Brown

Phase B - Red

Phase B - Orange

Phase C - Blue

Phase C - Yellow

Grounding conductor - Green

[b.

Aluminum Conductors: Should the Contractor choose to use

aluminum for conductors No. 4 AWG and larger, the Contractor shall

be responsible for: Increasing the conductor size to have the

same ampacity as the copper size indicated; increasing the conduit

and pull box sizes to accommodate the larger size aluminum

conductors in accordance with NFPA 70; ensuring that the pulling

tension rating of the aluminum conductor is sufficient; relocating

equipment, modifying equipment terminations, resizing equipment,

and resolving to the satisfaction of the Contracting Officer

problems that are direct results of the use of aluminum conductors

in lieu of copper.]

(1) For 600-volt wiring, the aluminum conductors shall be of an

aluminum alloy listed or labeled by UL as "component aluminum-wire

stock (conductor material)." Type EC/1350 aluminum is not

acceptable.

(2) Equipment manufacturer requirements: Where Contractor

provides equipment whose manufacturer requires copper conductors

SECTION 16302N

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