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你可以参考UL62：. j$ J* U9 U- m2 x' [
4.1.9.1 Conductors shall be distinguished as follows:
7 ? T# K0 ?" d4 T: `' N: K0 ^(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and( S; U2 v4 _: V8 r( l d1 s
these colours shall be restricted to such use:
; i+ v( K/ _ b& O(i) white or grey coloured braid;
. W: |6 i5 F3 \5 n0 h6 _(ii) white or grey coloured insulation; for jacketed cords furnished with appliances, one
7 G; j9 B4 J) Oconductor may be light blue with the other conductors readily distinguishable from white
. a( ^* E; ]( l: ]; q8 D) tor grey;
$ I9 c- o0 Y5 G( ?1 m+ q0 U2 |(iii) white or grey coloured separator in integral constructions only;$ V; e6 L) F$ H/ Z8 `
(iv) tinned conductor on integral constructions only; or
! s6 ^" S/ H- v6 b(v) one or more grooves, ridges, or white stripes on the exterior of integral8 i/ a" T* ~9 R7 e
constructions only./ u. h- a7 i! n4 v. f; _
(b) Grounding conductors shall be distinguished by the colour green or a combination of the
1 b6 @; }8 v: y" ^1 a3 n5 H2 j# Hcolours green and yellow. On a grounding conductor coloured green, one or more yellow stripes* t- |; o' U' v- \4 e/ }
that cover no less than 5% and not more than 70% of the calculated circumference of the
) y( j! [5 s% `5 mfinished conductor insulation shall be permitted. |
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