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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  ' t3 S8 g. n3 e# I
至少18AWG，请查看第6.9章节
/ x |8 j, p5 A0 q* y1 ]如果满足6.9.3， 或者6.9.4线径可减少
: |0 @" M2 r: ]# b1 t那UL153里面是不是任何线径都可以呢，我看到这样一条：
( A* |% |) a) X4 \A conductor of a wire or cord shall be minimum 18 AWG (0.82 mm2) except where a smaller size
) j1 P+ N1 {1 V5 Q! O- [0 ris permitted in (a) – (d) below:
9 c' h; }8 I" W" H0 _: W! b8 ra) Internal wiring is permitted to be of any size provided it is adequately protected against
. J2 P6 E" I+ y% n. Boverload or abnormal conditions by internal fusing and protected against mechanical damage by; R- d3 ^7 e l2 J( B g
the enclosure, barriers, or routing.
+ a8 D/ n s. W% Q; E, Cb) A conductor in a Class 2 circuit shall be minimum 24 AWG (0.21 mm2).
9 F% T% c. B' l) |/ C- Y- uc) A permanently attached, completely enclosed, and maximum 6-inch (152-mm) long lead wire
! n" j6 d6 I+ l: d* q! rfor a clock motor or transformer shall be minimum 24 AWG (0.21 mm2), provided that stalling of
- Q1 G6 N# B7 S; l3 Q* m1 fthe clock motor or any abnormal or overload on the transformer secondary does not result in a
, F0 u0 Y$ t; J( G/ G& o. X5 f: Frisk of fire.
! v8 u J7 }& T, o0 Sd) Conductors for a series or series/parallel string of non-replaceable lights located within a, R7 h. n* q+ ~" H; o1 Y1 V
rigid housing which prevents moving or flexing of the conductors are permitted to be of any/ E7 t2 Y5 @ a7 ]6 G' V' C, F' a
size, provided that the portable luminaire complies with the Conductor Short Circuit and" H u/ v9 M" \
Abnormal Operation Test, Section 131A. |
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