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发表于 2013-11-7 17:49
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jsspace 发表于 2013-11-7 17:36  # k7 d+ \' i) v* ?
至少18AWG，请查看第6.9章节2 s0 A9 G2 A+ `1 C
如果满足6.9.3， 或者6.9.4线径可减少
那UL153里面是不是任何线径都可以呢，我看到这样一条：
! w! K3 Z6 H' }9 H& B) ]8 aA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size
4 `1 G- J6 H$ l0 c, }is permitted in (a) – (d) below:
1 q( ?! ^6 R4 K+ pa) Internal wiring is permitted to be of any size provided it is adequately protected against h0 H( a) F' ~* k: M
overload or abnormal conditions by internal fusing and protected against mechanical damage by
5 C! {% J" x( ^% uthe enclosure, barriers, or routing.
5 I+ A6 O3 H+ J s( eb) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).0 N3 U* p, L7 T. x- a; q p
c) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire) ~7 Y# k' q2 o. C; P
for a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of
4 I& V! L+ w0 t* `- K( z Xthe clock motor or any abnormal or overload on the transformer secondary does not result in a
. [9 s+ I5 R3 K V" Nrisk of fire.
1 f" B& V( ^; ^0 ?0 ]+ ~d) Conductors for a series or series/parallel string of non-replaceable lights located within a* ^% g; t, W; Y; E
rigid housing which prevents moving or flexing of the conductors are permitted to be of any
# v0 g% d+ _4 x8 ~6 g; o$ Y7 P) j$ jsize, provided that the portable luminaire complies with the Conductor Short Circuit and4 t4 W5 |4 }; v
Abnormal Operation Test, Section 131A. |
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