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this is what code says:
; ]7 I" f# w, x) d- A/ S: }* o7 ?4-028: Identification of insulated neutral conductors up to and including No. 2 AWG U7 w/ V6 S% v& q! u$ F+ H
copper or aluminum
6 Y9 k4 r7 {9 N" ?3 x% X" a(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including- l0 i! `2 Q5 @# M4 }
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
# J$ ?, G3 F+ n; t- [ W, h9 c# _# msuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes+ h7 H! Q9 v" h! E0 _
along the entire length of the conductor.
2 T6 ?* @% X+ x+ n$ d& ?5 T k" ]: ^(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure8 J1 }2 U, ?$ H! X! r% y
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified$ a( B) Z: ?/ ~: u( _* r
circuit conductor of the other system, if present, shall be provided with a specific identification, and the, d0 b" ]) B/ U+ S. U
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not: y1 ^8 L% O: J5 X. Y+ M3 a
green) running along the insulation.4 g C% Z) ?6 w6 F b: j
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of& [5 I. f* q0 \& N4 Y& X# P" b
an identified conductor; however, in the case of those flexible cords where the identified conductor is w8 |1 B1 \- c: h8 Q$ S$ Z' e
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
: X# r7 _0 o( O# S; |7 K% w/ i(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked# b8 `! i( A$ P7 F$ a' I
as the identified conductor by painting or other suitable means at every point where the separate! o( S Z$ f0 {7 ~( }* m
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and% I. x) j+ R6 E3 [* n5 Q" N
the painting or other suitable means of marking the identified conductor shall not be permitted to render. x1 r. H9 a) Y* ^- l% V( O
illegible the manufacturer’s numbering of the conductor. |
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