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UL 1598里面有专门的规定- }# ?" p/ P0 q! Q& \1 Q9 @0 B
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吊重的要求
J3 m! X8 d5 T7 R6 A- D. f8 z16.15 Loading
( ^! B+ ?& K& Z2 j0 j16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under
( D X5 t, O. Q9 bintended operating conditions for 1 h. The load shall be applied in the direction of actual loading
8 J8 A2 |) I7 p" R' Bconditions.
5 V$ ]7 f6 q' e( P; Z. {/ v: _16.15.2 Where more than one support is provided, the load shall be distributed as follows:/ s$ k7 _) l8 l
(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
/ L/ |& O5 G: l) L7 N4 ~ keach support; or
% K2 ]# I; ?( R8 U8 m2 b s(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall
9 Z% a: L, J" C, I2 _be similar to that encountered in the field.5 Y- j9 C; t7 n9 m
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical
/ S' \, C5 C# a9 A! zspacings or compromises safety./ H5 f8 l3 H/ ^( K
, O7 @+ Z5 K9 Y! a5 q' Q额外的支承措施要求
' u; D) M8 v; z& o8 f4 k10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
* `5 p$ f( ]3 z `box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items; }$ |5 `; _" ?/ M; _
1.21 and 1.33, if it is:9 G) H7 L0 l4 T# T, t! U
(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or* O2 ]$ k7 u# A% S0 o3 e
(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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