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UL 1598里面有专门的规定
5 V6 W/ K0 P' @$ N M
2 Z b9 Z9 K% l吊重的要求
1 S1 @! J p' R! w; ~- ^; O* i16.15 Loading% m' l5 S% c3 z0 ^/ Q
16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under
/ b3 q: ~! i7 f4 |' Q7 ?# Gintended operating conditions for 1 h. The load shall be applied in the direction of actual loading
" o6 N) Z. L) {5 Hconditions.
$ K3 A) W& \8 F$ W+ f3 d' G9 o16.15.2 Where more than one support is provided, the load shall be distributed as follows:+ P d0 }5 ^: h5 T5 k
(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
$ C x( ~9 {7 u. X+ Y8 E- peach support; or: k* G p* o+ W! l& d( z
(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall
: A) ]4 w1 w) t) C# N2 Bbe similar to that encountered in the field.+ o1 v/ R& E/ T4 x
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical7 d5 W2 p: M5 \3 r
spacings or compromises safety.+ y7 F& W+ w5 J3 q9 b, I
# ]7 [0 I. R: C5 r
额外的支承措施要求
# C9 g# Z* J7 g$ ^" i% g- Z10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
5 L, M# y& o2 C9 N1 qbox and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items
5 Y! \% l9 u. p# `# |+ h- ^1.21 and 1.33, if it is:5 a6 x( W: z6 A; v+ Y
(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or
! S; Q! `; B3 _(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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