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看看I类灯具的定义,老老实实外壳接地吧。
5 B6 O3 K4 o; c2 H( Q% o, A* k, \class I luminaire
7 c' N# i7 z& ^luminaire in which protection against electric shock does not rely on basic insulation only, but# m2 b! `0 z7 D! v
which includes an additional safety precaution in such a way that means are provided for the# T7 F) x- Y2 D! Y+ P2 l
connection of accessible conductive parts to the protective (earthing) conductor in the fixed# G& q' C% a$ G$ o( W
wiring of the installation in such a way that accessible conductive parts cannot become live in
/ H# U6 z# R) A. E9 Cthe event of a failure of the basic insulation: e2 m( x' `/ M. }
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