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jsspace 发表于 2013-11-7 17:36
* ^( D: W# H7 u. D至少18AWG,请查看第6.9章节
* }. @2 Z6 K* P. i* w# N& ~; |2 F如果满足6.9.3, 或者6.9.4线径可减少 - A. x7 ?- m2 O3 [2 H* E
那UL153里面是不是任何线径都可以呢,我看到这样一条:
- Z9 f4 q5 W7 R; vA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size
" M& {4 t m8 m- gis permitted in (a) – (d) below:* E# e' t! Z5 ?. F% ?
a) Internal wiring is permitted to be of any size provided it is adequately protected against8 S9 J3 r( H; ]" Y, [4 @4 r
overload or abnormal conditions by internal fusing and protected against mechanical damage by# Z9 {& C u/ c I/ R* ?& X
the enclosure, barriers, or routing.
2 g* o- Y7 b+ Wb) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).' Z/ x3 B; R8 s! Y
c) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire
# h2 `- c7 D$ l2 afor a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of5 ^ ] w8 R( P' a8 A
the clock motor or any abnormal or overload on the transformer secondary does not result in a5 Q& N$ C/ w7 m! [+ n
risk of fire." \+ f3 w8 G% C( z
d) Conductors for a series or series/parallel string of non-replaceable lights located within a% h4 Z: M. ]# t- r
rigid housing which prevents moving or flexing of the conductors are permitted to be of any% m4 d0 }- Z/ G8 w8 q' y8 V
size, provided that the portable luminaire complies with the Conductor Short Circuit and) m" W' a, i X1 N
Abnormal Operation Test, Section 131A. |
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