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UL1029a :- \0 `! E) u* L& l/ p( w
5.3.2 Component abnormal conditions
, x9 [& s, c2 l- S' |, I% _( x# B5.3.2.1 For electronic devices, various semiconductors (solid state) components and electrolytic capacitors shall be shorted one at a time to determine there would be no fire hazard.5.3.2.2 If it can be determined by circuit inspection that some diodes would not cause a hazardous condition or a short would be the same as the “lamp open” condition previously conducted, the component need not be shorted. Components located in circuits that were capable of delivering more than 50 W of power are to be short-circuited or open circuited in turn. The locus (locations) of the 50 W points can be determined with the method described in the Standard for Fluorescent-Lamp Ballasts, UL 935.
# U; g( |! s) }5.3.2.3 The device under test was checked for fire hazards by observation, checked for ignition or$ k2 Q/ P4 d/ V, {
dripping of potting compound, and emission of flames or molten metal from the device enclosure.. }$ l/ K% U& K1 O/ f
3 e5 ?1 h* \6 G' {! |! H4 [3 \我的问题是：元件的短路是在灯点亮之前还是之后？ |
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