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11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than6 G; B8 I( }7 d# Z5 a# |9 M, o
30 degrees from the horizontal and any outer wall that contains any of the parts specified in Clause 5.3.2
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(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and" m) G4 G- Y0 K1 G( L5 M
(b) ballast mounting slots, each having a maximum unused area of 26 mm2 (0.04 in2).
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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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