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this is what code says:
' F' I6 E" K; |/ L, h4-028: Identification of insulated neutral conductors up to and including No. 2 AWG3 }& N) u/ m: |) e7 f- h7 Y& ^
copper or aluminum# \" w u/ C$ I6 K" g
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
) A; e9 ]. X. R# T. ]' n8 w* K7 DNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
/ p% \* U {# i. H- f+ Esuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes, w2 d W& Z* n4 R( E# r
along the entire length of the conductor.
5 c4 w: z* } A/ c. u/ T( x(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure9 _ L% F2 O& ^5 R; j0 O
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
5 L& V c7 ]* S6 G8 [circuit conductor of the other system, if present, shall be provided with a specific identification, and the
; B* F& @7 A+ X5 x4 s/ a9 q: k2 f" z% ^identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not( g, @! i# _8 g; q; V
green) running along the insulation.) U1 x) c/ u* T4 g! |, \ {6 }% Q
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
3 z0 m. C7 Q1 W- R2 yan identified conductor; however, in the case of those flexible cords where the identified conductor is
% t- L+ O9 [: K7 C& g9 _4 Kidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges./ c& s+ k6 H9 q
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
! C/ S& Q5 m* B2 w. h% U* }as the identified conductor by painting or other suitable means at every point where the separate
( u2 x/ C; u! C3 S9 Lconductors have been rendered accessible and visible by removal of the outer covering of the cable, and4 c# H" y+ |/ s! U1 Z
the painting or other suitable means of marking the identified conductor shall not be permitted to render
2 A, I) H# I7 \ o& N8 Dillegible the manufacturer’s numbering of the conductor. |
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