吊灯的负重测试与安装要求

calvin

广东安规检测
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吊灯的负重测试与安装要求
# _7 U. Q* j) j2 [13.15.1
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.
13.15.2
Where more than one support is provided, the load shall be distributed as follows:
4 V6 V& V+ i4 u& |" }, u+ i1 q0 Oa) where parts supported are no more than 11.3 kg (25 lb), full load shall be applied to each
support; and
+ i. Q5 X; J6 a/ Q/ j! e% Yb) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall be
! J8 F! K" G  [$ b+ M, msimilar to that encountered in the field.
* @/ P1 ]8 f0 ?* y- }- j13.15.3
/ U4 u  f! u6 R$ ^) pThere shall be no deflection or deformation either during or after loading that reduces electrical spacingsor compromises safety.
9 u% x4 ~9 J4 A% Y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.