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UL 1598里面有专门的规定
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吊重的要求
: g* W* k+ N" w8 e2 I" g7 X: u4 T5 w16.15 Loading
8 Z _% \. ]% E! D- ~; A0 e2 w16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under
/ P% H# O6 x: H& W4 c& Wintended operating conditions for 1 h. The load shall be applied in the direction of actual loading8 k" Q" p7 b0 |1 D
conditions.
# u5 {4 Z5 s, ]% U1 e6 i; P- h16.15.2 Where more than one support is provided, the load shall be distributed as follows:/ T1 N; Y& ^8 M3 o
(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
0 @: N) t p& I3 Geach support; or! j) X: _' `# }% T% U# G
(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall# [$ i0 r5 {7 V) d; H* o
be similar to that encountered in the field., ?$ Y& V D) H3 i, [! }, H
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical$ \7 ]: Z+ V) P) j
spacings or compromises safety.
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额外的支承措施要求
: V- O" _( _+ x, r10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
4 A' ^& A3 V5 L% P; i1 S3 a* ^box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items
$ S2 X- o! a9 W+ o4 s1.21 and 1.33, if it is:
3 ?% Z/ x- Q0 {2 \/ B& _(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or
5 I: _& l5 ?; R(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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发表于 2007-6-17 20:03
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