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this is what code says:
% O- X. J! z( u; j' W& l4 O4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
0 H$ q) y8 o0 y- Wcopper or aluminum
$ T3 _: |8 G2 G9 ^* T5 M(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
F& f% a( f9 ^7 eNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
: l8 }! x: o3 d6 U/ Ksuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
/ q* q- S9 c% y) ]0 c+ a$ _along the entire length of the conductor.( T. v, g1 W# D, B. h/ C
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure, [6 i4 B" V0 r9 E( X% e, h) [2 C2 c
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
1 m" D+ {* c) s2 `2 ^9 E/ W lcircuit conductor of the other system, if present, shall be provided with a specific identification, and the% U# R" v9 g& x" w4 h9 E
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not, x, [8 B# t5 w- i
green) running along the insulation.
, k$ D9 }1 s$ a4 ?% T(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of9 X, M# O( A$ V) Q3 T/ M! K8 i
an identified conductor; however, in the case of those flexible cords where the identified conductor is% ?- S1 p& n# D! _7 p- m: z
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
1 w5 H: E+ ^! n0 k9 S# y(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
0 r9 i9 p, |6 x0 R2 P( g- fas the identified conductor by painting or other suitable means at every point where the separate
- Q/ U4 j6 P" X, n5 w6 v- yconductors have been rendered accessible and visible by removal of the outer covering of the cable, and( O- [- x/ W4 d U
the painting or other suitable means of marking the identified conductor shall not be permitted to render# r' X5 I1 |3 `5 f# U- J
illegible the manufacturer’s numbering of the conductor. |
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