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UL 1598里面有专门的规定
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吊重的要求
8 v2 |0 I7 ]+ @; x5 o16.15 Loading# C; N* m, O( W3 g. X
16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under: Z# L3 A3 v5 }2 M% A2 X
intended operating conditions for 1 h. The load shall be applied in the direction of actual loading/ i' o. ^8 u* k! y7 Q
conditions.
8 m5 i+ s/ n' i3 v2 H9 s" W$ C& ]16.15.2 Where more than one support is provided, the load shall be distributed as follows:
! J+ D3 D8 ~% X3 a! `(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
# l& q. R0 ~% `* L* r% q$ Jeach support; or4 E; P- e6 {* K- l* R( K% l, P
(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall
) [7 C5 V# o) X! L7 U3 }2 C/ vbe similar to that encountered in the field.: u5 G$ ~2 N; u* k' Z
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical
. P. I3 {. W z- S( I: Ospacings or compromises safety.8 x1 R% N% E. U
. E( _' C% l: B& h# T/ U# ]额外的支承措施要求
9 i. j4 E! `2 s2 n10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
' H; A7 q+ k3 j2 W# _0 ]box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items E# w+ ^! t& Q: [8 a
1.21 and 1.33, if it is:
- J, O Y) } g$ B4 X" g(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or
, m$ m* {0 k' V3 ~2 c h6 T+ V(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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