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本帖最后由 passagere 于 2016-7-28 16:43 编辑
7 ~6 @% C, Q7 D/ ]$ }+ lgmr24185 发表于 2016-7-28 11:45 & Z' |3 Q4 i7 l9 G2 `
但是UL认证的电线厂告诉我说标准对颜色没有要求,我见到市面上明纬开关电源DC输出端用线大量使用内部芯线 ...
" J1 ?9 q- h" V楼主,你说的红黑色是用在jacket还是insulation上?的确,芯线导体的颜色是有要求的。( [8 M/ u, a6 D) ?/ y( w
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见UL 62中对Table 20 热塑负载电源线规格表,其中标明SJTW的导线(绝缘层)的标识要符合UL 62的4.1.9:
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4.1.9.1 Conductors shall be distinguished as follows:1 [3 ^/ [0 n3 }7 J) a! J J
(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and
5 Q! t% X- N' D) @9 }. p" fthese colours shall be restricted to such use:
5 R j/ D5 \6 `4 x8 y5 Y(i) White or grey coloured braid;% n! c; ]! |4 w f. [: f
(ii) White or grey coloured insulation; for jacketed cords furnished with appliances, one
& y2 z' S, w- N7 {; bconductor may be light blue with the other conductors readily distinguishable from white( |0 X: X2 q9 g" x
or grey;
7 u. L$ l! {# G3 O* ]1 f! J(iii) White or grey coloured separator in integral constructions only;
" j; e& P9 w" i, c(iv) Tinned conductor on integral constructions only; or
5 l+ G$ Y7 D# Y6 U3 e0 S) q. _+ ^! [(v) One or more grooves, ridges, or white stripes on the exterior of integral' L, l3 o' A/ _* k# y! y$ j
constructions only.
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7 C' B$ ~) ^6 G# @(b) Grounding conductors shall be distinguished by the colour green or a combination of the0 E* T E5 i* Z+ Q( p7 ^' L6 x
colours green and yellow. On a grounding conductor coloured green, one or more yellow stripes
; z4 k/ _6 H9 f; ^, bthat cover no less than 5% and not more than 70% of the calculated circumference of the
" d1 {- N$ x9 F; G/ A/ B2 Lfinished conductor insulation shall be permitted.4 J; j2 @9 u& n! T7 I1 G
: }9 Q* s$ t3 m$ f7 N8 X# {于是,中性线导线可以用灰色或者白色,火线一般用黑,也可以用除了灰色、白色、绿色或者黄绿色之外的颜色。" a4 d: o6 h5 d3 }8 w! M
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你说的明伟的DC线输出线,其芯线外皮黑白色就是正常的。
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) h3 c; H3 o, T3 Y) u其实如果软线在工厂安装,在用户端使用无需接线的,如驱动DC输出线连一体式DC连接器,只要该线型符合线型的认证要求(即有认证),而该线型符合实际应用要求,中性线导线是否为灰色或者白色标示都不影响使用。这个颜色标识是电源线本身认证标准要求的,如果标准要求有,那么就会有,仅取决于你选定的线材的型号。
3 @1 y# u5 P. V" m$ P, k其实也无需考虑这个问题的,因为买的线是有认证的SJTW线,如果2芯线,一般都是一黑一白。
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当然,没有颜色标识的线材肯定不能用于需要在现场连接市电电源的产品上,因为这样不符合电工要求,会造成危险。. y8 S1 [2 m- e: r+ I
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