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你可以参考UL62：
& K |1 V# ], A1 Q O9 V4.1.9.1 Conductors shall be distinguished as follows:1 b/ E* w1 X0 Z, F7 f
(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and6 c y+ q& L* O& t6 |4 r; s
these colours shall be restricted to such use:4 K1 |. K. a- ~5 ~% A
(i) white or grey coloured braid;
3 ]( y2 C1 U N: S& S8 F(ii) white or grey coloured insulation; for jacketed cords furnished with appliances, one/ v% H) b6 S! c
conductor may be light blue with the other conductors readily distinguishable from white
! G: a6 ]& B6 R; F' V3 Jor grey;
2 O8 B' v. ^2 T$ r( ~- }(iii) white or grey coloured separator in integral constructions only;
' [ e4 Z3 c& P5 R- f- M3 C4 U(iv) tinned conductor on integral constructions only; or
g+ G+ M- w9 S1 z' l4 e2 x- U1 H8 }6 u(v) one or more grooves, ridges, or white stripes on the exterior of integral
$ _$ d0 t0 B9 Z* kconstructions only.. D- Z- T7 d j- {; E9 @. ^4 k
(b) Grounding conductors shall be distinguished by the colour green or a combination of the
4 g+ H6 U. a* {3 Ncolours green and yellow. On a grounding conductor coloured green, one or more yellow stripes6 _, h4 {# [ _9 _
that cover no less than 5% and not more than 70% of the calculated circumference of the j b% g" P: D8 k% [
finished conductor insulation shall be permitted. |
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