General - spec30210025

DOE-SPEC-3021-97

ATTENTION:

Variations in wiring which may be needed, depending on possible special needs in certain systems:

18 AWG teflon type-E hook-up wire for modules and subpanels or elsewhere if space and/or extreme

flexibility are critical

Special stranding where moderate flexibility is important

Shielding and/or cross-section compatible with cables of special construction.

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General. Wiring shall be 600 V, stranded copper switchboard wire

3.3.11.1

with type SIS insulation (heat-, moisture-, and flame-resistant).

Wiring shall be free of abrasions and tool marks, including nicks and

fraying from stripping of insulation. Wiring shall also:

a. Have a minimum bending radius of 1/4 inch

b. Have sufficient surrounding space to avoid jamming near

terminal blocks, or between terminal blocks and wireway

c. Be adequately supported to prevent sagging and breakage,

caused by vibration or shock in transit

d. Be continuous within a panel or unit; that is, with no splicing

Bundling. All wires for a given circuit, or a maximum of twelve

3.3.11.2

wires, shall be in one bundle to facilitate tracing for trouble-shooting

or removal for changes. The wire bundle shall be carried between a

clamp on the door and a clamp on the fixed portion of the board or

cabinet. The clamps shall be adjacent to the hinge and shall be

between 12 and 24 inches apart with the door fully open.

3.3.11.3

Rating. Wire shall be of adequate rating for the current to be

carried.

Wire size and insulation selection. Use nothing smaller than

3.3.11.4

14 AWG wire, except 16 AWG may be used for circuits where

maximum current does not exceed 5 A. Wire size and insulation

selection shall conform to and comply with the following: no

overheating of the conductor and no insulation damage to adjacent

conductor shall occur when wires associated with dc and ac control

circuits carry 20,000 A and 10,000 A rms symmetrical respectively,

for 25 milliseconds.

Flexible cables. Where cables must be carried across hinges to

3.3.11.5

devices mounted on doors, use extra-flexible, ICEA Class d

stranding conductors.