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UL 1598里面有专门的规定% Z1 ?! [2 c; w& q5 z K& ]- ]
/ E- B' B8 ^6 [" b. A" c吊重的要求4 {5 ]/ A9 l$ S+ @! p, @9 f5 _. v0 ~
16.15 Loading0 R' e0 \' c. X6 J9 c) @0 |
16.15.1 A supporting device shall support a load equal to four times the total mass to be supported under
' F: H* o t9 E6 ]$ k+ o) nintended operating conditions for 1 h. The load shall be applied in the direction of actual loading7 s5 Q$ I% r9 A0 L
conditions.
- |0 ], v) Z6 A0 @, Z8 Q! n% l2 R9 i16.15.2 Where more than one support is provided, the load shall be distributed as follows:
8 u3 Z4 ?# J/ f# B7 u& |(a) where the parts supported are no more than 11.3 kg (25 lb), the full load shall be applied to
, S* k- a: H$ e3 `& |9 n4 v" K. Peach support; or+ b$ F7 \9 q- k
(b) where the parts supported are more than 11.3 kg (25 lb), the distribution of the load shall8 z+ C0 U/ o! J7 j3 r0 p
be similar to that encountered in the field., I! n# i. X; F3 ?9 ?" v0 @
16.15.3 There shall be no deflection or deformation either during or after loading that reduces electrical1 m1 y/ k, g/ v4 A) p
spacings or compromises safety.2 `) D8 ?" H! c0 D
; W N( T$ @+ d! Z p* Z8 v, G" n) g9 [额外的支承措施要求5 H! ^2 i8 E- Y4 |, n
10.2.5 A luminaire, including lamps, shall be provided with means of support independent of the outlet
, M! Y9 |- K* W @: j9 M+ r; z! Rbox and shall be marked and provided with installation instructions in accordance with Table 20.1.1, Items2 S/ P2 C4 U8 X1 N+ M
1.21 and 1.33, if it is:
6 G) k: U3 Y8 x$ j7 ~. O(a) a ceiling surface type and weighs more than 22.7 kg (50 lb); or
2 }- F3 \7 h/ s2 @(b) a surface wall-mounted type and weighs more than 11.4 kg (25 lb). |
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