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UL 1598里面有专门的规定
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" k' x3 J, U6 C" d5 s吊重的要求& |1 J5 X1 K+ y) p! W& }2 E
16.15 Loading
4 z' b5 A M4 D; F" z$ y16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under9 p9 k2 g1 ~7 {: s, v
intended operating conditions for 1 h. The load shall be applied in the direction of actual loading
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16.15.2 Where more than one support is provided, the load shall be distributed as follows:9 M$ v6 q+ G9 w) C: v
(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
8 K u1 _2 S- o2 ?( Keach support; or
: {: y1 y5 o( ?(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall$ d2 @2 ?( C) _: _! [1 O
be similar to that encountered in the field. E# q) i- c! Y. T# J, j5 L9 z
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical! h- S4 r0 r; S3 b% F4 y1 H b
spacings or compromises safety.
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9 a8 r4 M+ I" U额外的支承措施要求% b5 s1 b( V$ R. Y9 @: Q1 u
10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet% Y" a# m9 P+ i/ s2 r
box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items
" L# |/ p/ o4 M& O8 s; v$ `1 D3 S2 m1.21 and 1.33, if it is:
2 _" j3 U4 {8 X2 x3 W* ^' @* L4 ?(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or# a( n I0 D0 R8 ?9 R' q! e
(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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