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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
: K8 p" l) ]! A7 ?6 W结构部分的排水孔里有规定面积。
3 O: p/ x3 {+ b9 a) l) ~, o# b2 F( G% d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:
* k. H0 i& c0 Q- ]% Q( b4.17 Drain holes ) y; G4 d! I, t1 v, f( c6 v) `2 {
Drip-proof, rain-proof, splash-proof and jet-proof luminaires shall be so designed that if water 6 \) W" a: V: O* s
accumulates in the luminaire it can drain out effectively, for example by opening one or more % u8 @8 Q$ N1 Q4 _" x. B
drain holes. Watertight luminaires s hall have no provision for draining. * F3 r7 Q% }) O0 m
Compliance is checked by inspection and by the tests of Section 9. # e+ c7 x3 t, ^2 M
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. 0 m3 f6 i( i( @* _) y- {# l
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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