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d) 1) For luminaires without drain holes, there shall be no water entry.
: r. G' c, }4 }2 ]6 o6 K% bNOTE Care should be taken not to mistake condensation for water entry.& o( @- ~4 h: ^& Y
2) For luminaires with drain holes, water entry including condensation is allowed during the2 T( ` m9 e0 K4 {! s
tests if it can drain out effectively and provided it does not reduce the creepage and; r, ^5 |8 g. k# z! C8 b7 V
clearance distances below the minimum levels specified in the standard;' \& p0 E: B0 A8 `* b* ^
) j2 A$ H: I! V$ t1 B
如果没有排水孔,不能有任何水进入灯具内部,应注意不要将凝露误认为是进水。. X4 b$ m) M4 J4 C
如果灯具内带有排水孔且水可以有效的排出,不会使爬电距离和电气间隙发生改变。水的进入包括凝露水是允许存在的;
8 k: F1 Q# t- Y3 _: V7 O9 Z; V' L# [+ `从标准上看,你的IP44没问题,凝露水不算进水。 |
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