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this is what code says:
* @- `0 K' l, R2 g4-028: Identification of insulated neutral conductors up to and including No. 2 AWG) a' c$ M4 t! z, j/ Y
copper or aluminum# t; o e' [- y; @) I! x
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including, E) E+ \2 a% J. ]
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
4 b! b! z: V& Q6 q* nsuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
4 U5 J* m( U; Z( Oalong the entire length of the conductor.2 K/ C6 Z7 f& S2 m4 I$ K5 N1 Q
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure! T0 J8 l7 l( C+ |# ^
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified7 L) ~9 D6 Q' Q( ?1 D( y z& v, ?
circuit conductor of the other system, if present, shall be provided with a specific identification, and the% _" s! z. c$ z, r
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not7 `) O) P3 @# X! d) G
green) running along the insulation./ o" r) w* H6 R) g5 `) e5 E# B
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
/ s6 \7 A( |( uan identified conductor; however, in the case of those flexible cords where the identified conductor is
# d* y3 f+ U! [ `identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
) G* L( o4 ^7 p# j, N- a' W2 M# d(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked1 {- r. U8 ^ Y- `- g( [
as the identified conductor by painting or other suitable means at every point where the separate3 }# g- e* ^& P
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and( r9 ~% { F9 k+ C+ _% T2 u
the painting or other suitable means of marking the identified conductor shall not be permitted to render
" ^/ A& ^/ O5 Z7 l# s* Xillegible the manufacturer’s numbering of the conductor. |
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