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板凳
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发表于 2012-10-19 08:50
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wwnw_007 发表于 2012-10-19 08:38
# X7 ?+ y% S7 s3 u1 x5 I' a/ W结构部分的排水孔里有规定面积。 & x3 x( B$ k) s& `
结构部分并没有规定排水孔面积,不知道你指的是哪个标准。下面是IEC60598-1的第四章关于排水孔的描述:
! f. o* h/ _& ~" ]2 q" H3 [4.17 Drain holes 4 k9 G, m- \3 M1 G
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water , P" \. e) @" p8 w) s
accumulates in the luminaire it can drain out effectively, for example by opening one or more 8 g2 u Q. ?9 y+ K; e6 I% q
drain holes. Watertight luminaires s hall have no provision for draining.
& d$ m# B" @! R1 l! {; |! @9 iCompliance is checked by inspection and by the tests of Section 9.
* ?$ J! X! @: K# z5 V7 Q7 ^NOTE A drain hole in the back of a luminaire for surface mounting is effective only if the design ensures a clearance of at least 5 mm from the mounting surface, for example, by means of projections from the back.
% M* G$ ~0 ]1 c% n: C上面只提到了孔位应与安装表面有至少5mm的间隙,希望能够得到专业一点回答,不要笼统想当然的回答。 |
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