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jsspace 发表于 2013-11-7 17:36  # ~) b9 G5 e" u, [$ g) \6 l
至少18AWG，请查看第6.9章节
4 o7 f1 f7 }( g6 j* t如果满足6.9.3， 或者6.9.4线径可减少
( `7 ?# x1 |% r) i那UL153里面是不是任何线径都可以呢，我看到这样一条：
8 p3 ~- i2 L0 L1 H- iA conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size
3 @" {( P1 m3 Y1 n: [* ~# }" u' \% f* L7 sis permitted in (a) – (d) below:
5 a9 i' t B3 X7 P% M- ^1 ]a) Internal wiring is permitted to be of any size provided it is adequately protected against. R. h0 d: q9 P) `
overload or abnormal conditions by internal fusing and protected against mechanical damage by6 Y3 ?! a; E- g0 c
the enclosure, barriers, or routing.2 [- K, ?) d, W% g: f* h
b) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).
0 p7 J: G" ]8 g3 M& B3 ]7 O% Bc) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire
4 y0 w. s. [. x) u: Y" ^: [for a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of3 e0 f0 S" h+ w e- Y/ ~; w( Y
the clock motor or any abnormal or overload on the transformer secondary does not result in a! S' y) Z" p; h% Q% j* I
risk of fire.& K2 H0 W; `3 a2 R1 E; ]
d) Conductors for a series or series/parallel string of non-replaceable lights located within a; m4 ^) O! X3 S6 i/ u1 T
rigid housing which prevents moving or flexing of the conductors are permitted to be of any
! F- ]( m0 A& K4 e2 Fsize, provided that the portable luminaire complies with the Conductor Short Circuit and- R0 s7 H( \$ F+ ^8 m- U# @- l; K' M( a
Abnormal Operation Test, Section 131A. |
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发表于 2013-11-7 17:24
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