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Housing可以当外壳,在UL1598中,条款如下:
# n2 ]2 U1 L" _; z0 V11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than
9 K0 ^7 }6 ?3 p: D% v$ B30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2 shall have:9 p4 {& y5 w* t8 r5 q& R: B X
(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and3 C d* a8 d6 C0 f+ ~
(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2). |
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