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看看I类灯具的定义,老老实实外壳接地吧。
R* f5 _6 c- N$ M( i" D' |class I luminaire* U% L7 `1 N' m: X Q
luminaire in which protection against electric shock does not rely on basic insulation only, but: j( J& |) W" N4 s; i4 }* l
which includes an additional safety precaution in such a way that means are provided for the
7 T9 J/ N3 L6 d" d' _/ V6 C Y uconnection of accessible conductive parts to the protective (earthing) conductor in the fixed3 Y7 j3 [& j1 K$ E) m
wiring of the installation in such a way that accessible conductive parts cannot become live in
, ]1 H; f& p. R9 othe event of a failure of the basic insulation
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