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jsspace 发表于 2013-11-7 17:36 / l4 o) J" c4 i" J
至少18AWG,请查看第6.9章节, U1 v9 h: I( {. y8 C
如果满足6.9.3, 或者6.9.4线径可减少
( L. w- z4 M2 w/ D1 i那UL153里面是不是任何线径都可以呢,我看到这样一条:
3 Z- j, ], @; V' d% G* b" RA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size( Z8 o/ j5 S ~/ P7 d; ~
is permitted in (a) – (d) below:
5 [& [/ ?3 K$ a" Za) Internal wiring is permitted to be of any size provided it is adequately protected against
# j; N- `) V5 Y% O+ @' [+ loverload or abnormal conditions by internal fusing and protected against mechanical damage by# t% l# u0 k! P3 e, M3 }* E7 M0 p$ S
the enclosure, barriers, or routing.' x f$ K/ R* F) O
b) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).
9 X/ Z( F* G3 d2 w6 e% @! Z" M3 t) T) `c) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire
+ X" E! [3 x8 Gfor a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of$ M1 M' y' U# R3 l+ q2 p4 S( x
the clock motor or any abnormal or overload on the transformer secondary does not result in a( P1 V0 T% q0 D5 e3 [: H/ D! c: R
risk of fire.
. H8 h e' ~9 A! `d) Conductors for a series or series/parallel string of non-replaceable lights located within a6 p) i; w- a6 q1 y/ M
rigid housing which prevents moving or flexing of the conductors are permitted to be of any: r1 I% {& u- [, X: R
size, provided that the portable luminaire complies with the Conductor Short Circuit and- v* K0 Y6 b, a7 X5 N( q5 Q1 M
Abnormal Operation Test, Section 131A. |
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