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this is what code says:
! t# [! Q6 g, [& S' X- Y3 o; b4-028: Identification of insulated neutral conductors up to and including No. 2 AWG& R N$ n, f, R" \; D
copper or aluminum; G5 }. U6 ?, z! z6 x6 m
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
1 ]* l( ~$ ?; a' d( k. PNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to/ M/ g/ H$ Y4 w/ r9 v/ _
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes! J8 z2 x% X, L
along the entire length of the conductor.6 \, q& B% l0 J
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
1 B6 a) y- f1 s9 ~and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
1 p" B5 A% B: [0 Kcircuit conductor of the other system, if present, shall be provided with a specific identification, and the) u* U' B4 z( N
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not2 X: q- x, Y [ s9 b- g$ k0 I, r
green) running along the insulation.$ ]% @4 s2 ^; e2 y
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of' g# f1 @% _; H) O) \4 A
an identified conductor; however, in the case of those flexible cords where the identified conductor is& | A# y; y3 C4 d6 q$ W4 B6 v' L
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
0 l- }$ r+ i3 A. D/ }(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked$ h2 n! }1 ]/ U) ]8 T `
as the identified conductor by painting or other suitable means at every point where the separate4 _- N* T/ t6 a1 n" k+ f
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and' F$ {0 i( G' B# |+ q3 u. r8 x5 k$ u
the painting or other suitable means of marking the identified conductor shall not be permitted to render% M' d6 ~* A9 K+ {
illegible the manufacturer’s numbering of the conductor. |
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