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11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than) b4 a3 r7 e$ c/ _ j5 j7 Y
30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2
7 f1 C$ U& ?2 s$ `8 M3 rshall have:9 r% W' R0 E: D7 B
(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and
[; z& J" R* i7 b(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2).' G# b8 C0 O% R1 n; L& p
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与水平面小于30度的顶部表面是什么意思 意思就是housing最上面的帽子?
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