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this is what code says:
6 X2 j0 D. z. R1 p- j4 B4-028: Identification of insulated neutral conductors up to and including No. 2 AWG; P! H$ Y2 Q; t1 l4 E( i. f/ Y
copper or aluminum# y* ^2 }' I8 B8 V; [( V; {
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including3 z: h5 U- H( T8 ~- s4 u
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to2 z* D. @, R% n# E) _: k# M
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes- ?2 m9 n, X" I+ ^2 z! ], i$ q, v
along the entire length of the conductor.
, d- |4 t& g' k- R0 s, M5 b(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure2 h }( x3 \5 |' g8 ^- K
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
% \: l" N- K' B0 Q7 N) w& Zcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
1 e5 X( p' @. {7 ^identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not# k; _; y5 D+ l
green) running along the insulation.
) Y: b( L7 c+ m' U# J(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
7 q3 F, ]! S0 x0 V2 M9 ]an identified conductor; however, in the case of those flexible cords where the identified conductor is
' l/ L$ y$ }( ]% iidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
2 Z, ~6 }2 g$ O, E3 n(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked9 B4 _. m' z$ \! W3 e/ U$ q0 M2 l% C
as the identified conductor by painting or other suitable means at every point where the separate9 k1 @, ?* V3 q4 j! y, _4 B
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and3 ~/ h8 j/ t E+ n4 m
the painting or other suitable means of marking the identified conductor shall not be permitted to render- V# \) D# o! u1 J# w3 t
illegible the manufacturer’s numbering of the conductor. |
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