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this is what code says:
: I# n: Q7 M4 G) C: F2 k4-028: Identification of insulated neutral conductors up to and including No. 2 AWG5 N6 N' u) c: J( E
copper or aluminum
% G" c/ B+ e& P. a9 h" p6 W2 V W! n(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
" j( H0 z; e% j, ]0 r! DNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
; @* A0 I: ~& S( @; y0 osuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
( \, G2 ?2 W, ]) Z7 T) n1 Z4 }along the entire length of the conductor.
: T4 q( y$ V1 v5 c' G(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure: s. ^4 |. B2 ?1 J3 n
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified' l' I$ k" X5 X2 s
circuit conductor of the other system, if present, shall be provided with a specific identification, and the8 D4 P4 Y5 X4 k2 B
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
5 q) Y- [: b) `0 s* c' V/ wgreen) running along the insulation.
! [; x% }/ p1 Q9 f" q(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of% t$ K: U& X* O) b p& j8 V# j' K
an identified conductor; however, in the case of those flexible cords where the identified conductor is- v5 H0 z7 t2 h/ s) l. R
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.4 B B! e i+ I- {& C, H
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked, o1 ?- ]7 w' P; U( b" s
as the identified conductor by painting or other suitable means at every point where the separate4 l8 l' I% z5 H; U
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
1 R( s7 T8 z* v- }4 Lthe painting or other suitable means of marking the identified conductor shall not be permitted to render
2 H8 _2 Z) v( s! R+ cillegible the manufacturer’s numbering of the conductor. |
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