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jsspace 发表于 2013-11-7 17:36
6 c4 k9 k0 o( }# {" n+ s' Q$ Z至少18AWG,请查看第6.9章节$ M$ O3 b0 f4 Q% y/ k
如果满足6.9.3, 或者6.9.4线径可减少 ( L+ I; x. V9 d' a' z3 U+ n$ ` O
那UL153里面是不是任何线径都可以呢,我看到这样一条:
. `" C* k/ d5 ]# |: FA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size5 w- q8 d Z! B4 `% I
is permitted in (a) – (d) below:
% D6 k! A0 f) a4 O" J; V( z: J) Ka) Internal wiring is permitted to be of any size provided it is adequately protected against9 H6 Z& S& S3 l
overload or abnormal conditions by internal fusing and protected against mechanical damage by
9 n/ {4 A: \/ \the enclosure, barriers, or routing.! z9 v: ^. k4 m% ^2 N9 n0 i1 u
b) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).
3 y/ b! `: b+ M4 t$ k; Fc) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire/ U$ `- B7 |; o$ g: R
for a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of# _3 q8 m4 |( [/ k {/ }2 a
the clock motor or any abnormal or overload on the transformer secondary does not result in a
* X1 J+ t* G) trisk of fire.
" T5 F$ U( W8 ?6 N6 Y! L/ Od) Conductors for a series or series/parallel string of non-replaceable lights located within a
( @/ @, J5 h3 B8 ?rigid housing which prevents moving or flexing of the conductors are permitted to be of any
, p8 U9 K' T7 D. \; ^size, provided that the portable luminaire complies with the Conductor Short Circuit and5 _4 Z( e. W% b. {
Abnormal Operation Test, Section 131A. |
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