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this is what code says:
x: B3 j) [8 @/ R6 Q/ k4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
" D& w4 S" M+ t9 I# O( z( ^copper or aluminum
6 R) X0 R" Q* r(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
' L0 w4 H; {6 C5 Z" u; ]$ W+ y' r4 BNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to1 ]6 [( N- ^6 |% }) D+ \8 z$ @) F
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
+ r4 j- O$ h8 }' galong the entire length of the conductor.
$ s: e/ t8 K. `% r P7 n& g(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
% N. q' o# w1 B) G/ t( p7 Cand the identified circuit conductor of one system is coloured by a white or grey covering, each identified
' D/ [& A4 u7 d6 z9 icircuit conductor of the other system, if present, shall be provided with a specific identification, and the* D- F8 N! h0 q S& |' R, q
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
9 I+ {1 ^* [: ?5 |green) running along the insulation.
+ i* X; o# A) W2 u! _ a(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
8 S" @% O3 t9 B8 w3 ^an identified conductor; however, in the case of those flexible cords where the identified conductor is# }4 ~: U. O5 e0 J: M
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
2 M% m3 {; t$ D(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
/ X# ?) E( c" @7 l9 X( `0 g" I |0 ?- Has the identified conductor by painting or other suitable means at every point where the separate4 u7 m2 X* k! }" b0 r
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and( R4 |1 R; l% t4 {* @; a
the painting or other suitable means of marking the identified conductor shall not be permitted to render! R1 p! ^; L/ [5 Y0 p, C# E
illegible the manufacturer’s numbering of the conductor. |
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