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Housing可以当外壳,在UL1598中,条款如下:
4 y3 l( p4 \* I11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than
/ H2 m2 R4 A- P+ K30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2 shall have:
! s/ m5 \- l% L8 ]' s/ |: O: ](a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and. x: @5 b7 V& M$ z3 n( j- d* _6 ^
(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2). |
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