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Housing可以当外壳,在UL1598中,条款如下:
- `. L1 W" {. N$ Y* R11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than
6 Y! \/ Z. L! c+ v! X30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2 shall have:
7 i4 Y) X1 \8 s4 `9 p, D(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and" ^" E0 x# X- Y' b+ }
(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2). |
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