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this is what code says:
0 U: B8 a8 n- ]' F* I4-028: Identification of insulated neutral conductors up to and including No. 2 AWG* U1 X5 ^3 `0 F4 O& ^; i3 T. [
copper or aluminum
6 F+ I/ B& }" ^$ f: x" q(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including& n3 J! `5 U) M: U0 e
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
& E/ y8 a) v! [! ^such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes2 F/ k0 l* p ^0 K1 X9 }
along the entire length of the conductor.
6 @7 M, V( ]: j3 i(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure% F# o' Y7 Z/ P6 ^# r8 d3 _- X* q
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
, }% H; L, {& a: c. \7 p' vcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
& O6 P* E; t% p" ?0 p% o" Lidentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
& |' o6 q$ n: Z1 T& p; q) ygreen) running along the insulation.
8 S J. @( g1 I, f(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of. S' Z/ @7 @" q2 }: s; X# h# J
an identified conductor; however, in the case of those flexible cords where the identified conductor is2 b9 z! h3 _% Y, i0 e
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
/ |- F7 y+ U) b6 O K" Z8 q* P2 \5 J(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked2 I8 P4 |0 T1 _4 M
as the identified conductor by painting or other suitable means at every point where the separate
% m* G3 j0 L1 K- y6 \% w! Econductors have been rendered accessible and visible by removal of the outer covering of the cable, and- S; U. q: m# ]5 |0 V. p3 e
the painting or other suitable means of marking the identified conductor shall not be permitted to render$ C; ?" C# j7 l+ O
illegible the manufacturer’s numbering of the conductor. |
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