|
|
UL 1598里面有专门的规定, Y. l: U. P' ` o
8 o0 K# `2 R" ]7 G$ D$ {) O2 ~, {吊重的要求8 V9 l5 d* a( ?
16.15 Loading
* w2 W* Q! E1 J. G16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under# R, Q" _& ]/ q0 V! t5 a- V
intended operating conditions for 1 h. The load shall be applied in the direction of actual loading$ q' t5 X, F Y1 ~" J3 d# N
conditions.) Z5 C% ~, C( Z/ F4 b6 i, F: O }3 l
16.15.2 Where more than one support is provided, the load shall be distributed as follows:
. y" g9 D& A# v$ i4 D1 T(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to/ Y- D2 F% K* Z( {7 }* l
each support; or% z/ P( k' i& c4 N7 O4 r) h
(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall
& ^) d! M$ h1 O6 a* qbe similar to that encountered in the field.2 t. U# f! R& g
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical
* ~, R. u& |- Q" j3 a' M6 n5 F zspacings or compromises safety.
7 G3 }- J5 L0 W f3 r# Q$ j+ b& [( G/ ~% _* w
额外的支承措施要求' j0 q$ v1 k: x! z: B4 K
10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet$ s# V8 Y0 z1 |9 i8 N% W0 p
box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items) A( I7 }; u5 q
1.21 and 1.33, if it is:( N8 B0 v; U' {6 p, t! R
(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or
# s o1 ~1 N5 T `7 P(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2007-6-17 20:03
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2007-9-8 09:12
