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11.4.3 Where a luminaire recessed housing also serves as an enclosure, a top surface that is less than: w% h) g- i3 U) 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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4 m% q0 J% t: A0 ?, e. [8 ?# N(a) a maximum of two pryout slots, each having a maximum area of 26 mm2 (0.04 in2); and
" b' r7 E9 O4 H o @1 s& w6 g- }(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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