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jsspace 发表于 2013-11-7 17:36
! `4 `6 l% p6 f' F& X- E至少18AWG,请查看第6.9章节
1 B. ^* O N1 Q如果满足6.9.3, 或者6.9.4线径可减少 1 m9 W& |: p1 }. K3 Q: ]3 Y
那UL153里面是不是任何线径都可以呢,我看到这样一条:
8 }5 `, C' G4 O! RA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size+ T( j. @: H, ]! z
is permitted in (a) – (d) below:
9 m# e; y+ c" H2 ?/ L* sa) Internal wiring is permitted to be of any size provided it is adequately protected against
! w& I! t: N# `8 b! m# w% Yoverload or abnormal conditions by internal fusing and protected against mechanical damage by" I! S1 I5 G! t
the enclosure, barriers, or routing.6 A' v6 f; I. \$ T+ e- `
b) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).
7 u" Q1 O( y8 `9 U% p8 L r- lc) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire
9 u6 b4 g# l, l* D2 @for a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of
6 [( ~4 a3 V( hthe clock motor or any abnormal or overload on the transformer secondary does not result in a) C4 X7 N$ N/ U+ L# o
risk of fire.9 S) W: D+ x8 ^
d) Conductors for a series or series/parallel string of non-replaceable lights located within a+ S2 n. H1 n' O% W
rigid housing which prevents moving or flexing of the conductors are permitted to be of any
# i- [1 ]0 x! [# c/ u! ~7 _7 Jsize, provided that the portable luminaire complies with the Conductor Short Circuit and% d" B! I! V- D5 F* n8 w5 z
Abnormal Operation Test, Section 131A. |
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