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UL 1598里面有专门的规定
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( p) n# X: h1 d; j% A0 ^0 p吊重的要求
0 q9 m& H' D7 K7 x16.15 Loading4 W# g9 o: W8 A2 a. K. w# J8 g
16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under
. h' I- _9 V! u6 ?+ Sintended operating conditions for 1 h. The load shall be applied in the direction of actual loading! r" q/ ^% o( O( J8 h; s& q# @% J/ T
conditions." R0 q4 E; H0 K0 q
16.15.2 Where more than one support is provided, the load shall be distributed as follows:+ C7 L( X' F# ~
(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
% |0 k) A+ Y# ~, M. Reach support; or
: h) h6 C8 X% e0 c3 V) L# F5 ~) ?(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall
" r. r" e7 ~3 Jbe similar to that encountered in the field.
9 ^" N* S0 Z9 z" U, j2 I16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical9 b4 b; L R4 N: x, }
spacings or compromises safety.* L$ I7 F2 |" ^ j" Q
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额外的支承措施要求
& y' q6 M. L# r7 [$ P10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
3 o' k. o/ U* v# B& Obox and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items0 p: ^0 g0 F) I9 {6 p. }8 g
1.21 and 1.33, if it is:1 R) {: d% S; |% |& y( w
(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or1 S s+ j6 M* J: `) C' p
(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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