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UL 1598里面有专门的规定
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' |* x, M5 @. O0 g) C吊重的要求
) l. q7 l: V5 i, m+ p16.15 Loading Y9 L8 _' U, Z4 r6 N+ u$ N
16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under! _. n6 u2 x% C+ U0 q
intended operating conditions for 1 h. The load shall be applied in the direction of actual loading5 o/ Z1 E6 O: q5 p+ `
conditions.
% s3 n! r6 N \16.15.2 Where more than one support is provided, the load shall be distributed as follows:
, V! @* c6 H x9 y+ G# q+ S(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to9 i6 G: S) M* C3 A; f+ g" @7 A
each support; or
1 F% B# \" {# H. q# Y( Z(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall7 r; v( r* K) I3 \
be similar to that encountered in the field.: X8 U, n! D0 y- \) ^
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical R# M7 X3 S; O8 ^6 M( D
spacings or compromises safety.- O, H0 h# Z0 B! w, _" v$ u
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额外的支承措施要求$ r( @+ f, I. ~8 {' H
10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet6 T& ~8 P( N3 E" L# i4 S
box and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items
, o6 \. x& W" r3 X: N( J1.21 and 1.33, if it is:! {8 ^# I& h0 w9 E# v
(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or1 i" G. S7 V( B: U1 L
(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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