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Housing可以当外壳,在UL1598中,条款如下:
7 `; |" m$ a% ?" H$ y11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than
6 k' S# a3 O; L/ i4 G30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2 shall have:1 T! f' @2 l5 }3 E6 }
(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and _( c- i4 M q* _$ Y
(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2). |
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