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你可以参考UL62：
6 o+ B6 @4 x& K/ J6 A4.1.9.1 Conductors shall be distinguished as follows:
- q& B' q1 u4 X4 G' W* o; Y/ ^(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and4 u, i' j, {# o; u8 g! G" m
these colours shall be restricted to such use:" M+ |8 ?. [) a; s) C1 o
(i) white or grey coloured braid;
/ [( ] a! k% y! p1 d* O1 N7 h( T7 `(ii) white or grey coloured insulation; for jacketed cords furnished with appliances, one
7 z* y% g9 Z. ~conductor may be light blue with the other conductors readily distinguishable from white
1 U) G$ |* S# {' v+ xor grey;2 p" ^: s9 h# ^' D& G1 _
(iii) white or grey coloured separator in integral constructions only;
) y9 K5 I3 w# w7 c* X/ g( J(iv) tinned conductor on integral constructions only; or
. c. M3 j$ L, ^: t# _/ O(v) one or more grooves, ridges, or white stripes on the exterior of integral. `7 `/ Y8 K5 [6 a; ~9 X8 N! }) F5 x
constructions only.
- Q) v: k5 k4 f, H9 h, b(b) Grounding conductors shall be distinguished by the colour green or a combination of the( A/ e( G$ y# E5 y
colours green and yellow. On a grounding conductor coloured green, one or more yellow stripes
3 e% ~/ c; i, f8 t- h, B, M |, x7 zthat cover no less than 5% and not more than 70% of the calculated circumference of the
+ Y& U. }4 i$ i* u* }& F8 wfinished conductor insulation shall be permitted. |
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