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吊灯的负重测试与安装要求* s! P) W( w s- \: a
13.15.1. V0 y( X; y5 P2 S" C" r$ ]# y
A supporting device shall support for 1 hour a load equal to four times the total mass to be supported under intended operating conditions. Load shall be applied in the direction of actual loading conditions.7 B5 G' o7 O% D: a
13.15.2
- N9 E: l. [- i+ \1 ZWhere more than one support is provided, the load shall be distributed as follows:
7 U) f4 ?+ A! U3 M* ?a) where parts supported are no more than 11.3 kg (25 lb), full load shall be applied to each# o( x! r2 b& |/ X" S
support; and4 s# W7 ?% g# r9 F* M6 a
b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall be- O3 q4 ]. ?" \2 L) r6 P( `
similar to that encountered in the field.
; K" e ~) k( E3 \- K13.15.3$ G: U! s3 N3 ^3 r1 M; {
There shall be no deflection or deformation either during or after loading that reduces electrical spacingsor compromises safety., m& u B# V4 Q; G- i
所以对于一般的灯具,我们可用四倍的灯重来测试.如果产品超过11.3kg, 就要采用分散的多点负重来承重了. |
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