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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
5 A+ C& u3 ?3 V& T结构部分的排水孔里有规定面积。
2 ]$ q3 W6 p: ]- B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:5 T7 W I7 h& ?- A
4.17 Drain holes 1 H# q7 \% v* j8 s5 _
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water # \! v* e4 L" r# e2 n& ~9 M
accumulates in the luminaire it can drain out effectively, for example by opening one or more
- s" k5 Z6 |# h3 h1 Odrain holes. Watertight luminaires s hall have no provision for draining. 9 r ] O7 \5 L4 i, f
Compliance is checked by inspection and by the tests of Section 9. # w/ P3 F. P/ |( c( M3 H# y; O, w
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. ' j/ i+ g$ n1 \
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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