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jsspace 发表于 2013-11-7 17:36
; V3 b5 N8 g" `; o至少18AWG,请查看第6.9章节
; f) p/ h8 R( g5 _1 U如果满足6.9.3, 或者6.9.4线径可减少 8 N: ?3 ?* V3 `4 c
那UL153里面是不是任何线径都可以呢,我看到这样一条:
c6 M4 i9 F( G$ c: IA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size f- M3 M- C; j5 B$ }" t! x. k
is permitted in (a) – (d) below:, G: a- B1 M% v- Q2 y
a) Internal wiring is permitted to be of any size provided it is adequately protected against
* H8 o! F. O/ Uoverload or abnormal conditions by internal fusing and protected against mechanical damage by$ n+ N z8 i% Y, _* @
the enclosure, barriers, or routing.
8 \) D- D, p9 Z6 F* Sb) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2)./ H: l8 q6 @3 l- b2 l" b" }
c) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire! `3 e7 n5 O6 B. g. B
for a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of7 r; H, @6 E% q/ s) |/ }9 Q+ G
the clock motor or any abnormal or overload on the transformer secondary does not result in a+ y0 x! f, d2 V3 L" n
risk of fire.& g1 g% Q1 g7 }5 c
d) Conductors for a series or series/parallel string of non-replaceable lights located within a3 Z. _0 I: B6 A+ }, ?9 @+ v$ o
rigid housing which prevents moving or flexing of the conductors are permitted to be of any% _0 u- [- f9 V; B
size, provided that the portable luminaire complies with the Conductor Short Circuit and
# N" F4 {! d: dAbnormal Operation Test, Section 131A. |
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