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this is what code says:
, o' @- L2 y9 r* q' u/ v g0 J4-028: Identification of insulated neutral conductors up to and including No. 2 AWG! f- E% c5 f( u& r0 @( T; ?
copper or aluminum
5 E9 Q& Z: {; W1 Y# T/ O6 ^(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including4 v, x7 @' [9 {7 Y$ E0 s7 E, J; d
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to. L3 t/ `- [$ k+ o
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes8 ]9 z2 I8 c# }& b1 o% C6 [; p
along the entire length of the conductor.. Y" E5 n! f6 _& _3 }7 I
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
( O( ^7 q$ s2 N5 rand the identified circuit conductor of one system is coloured by a white or grey covering, each identified. s- X+ y+ q7 W, z+ [& u* q
circuit conductor of the other system, if present, shall be provided with a specific identification, and the2 f$ r3 ?2 C2 L* `/ E
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
" G% t+ C$ {' P% ], z4 rgreen) running along the insulation.
" g% r; {6 S6 \3 r(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
2 V. d! \+ N3 i/ A% w x4 Man identified conductor; however, in the case of those flexible cords where the identified conductor is
5 D! j& A7 o8 [! Hidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
; m) s& ^$ Q5 x! v* y(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
3 o" o+ {3 ]9 Q% Xas the identified conductor by painting or other suitable means at every point where the separate# ^6 p- z, @' |* o+ b( w& d8 Z
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and) w, l# G6 u B, Q
the painting or other suitable means of marking the identified conductor shall not be permitted to render; ^6 q' B) n/ T% h b3 Y# e7 \
illegible the manufacturer’s numbering of the conductor. |
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