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看看I类灯具的定义,老老实实外壳接地吧。
* A' a3 X- Q9 v5 q0 Nclass I luminaire
2 S( ?3 L S' sluminaire in which protection against electric shock does not rely on basic insulation only, but
$ q0 Q* [& T5 a7 t: `, B9 P( swhich includes an additional safety precaution in such a way that means are provided for the A! g8 k% j* a- d0 ]
connection of accessible conductive parts to the protective (earthing) conductor in the fixed) f! R+ f7 y5 W0 m6 [; w1 R% O& ^
wiring of the installation in such a way that accessible conductive parts cannot become live in
- M% X# N9 v" S4 o# athe event of a failure of the basic insulation; X/ `0 I( S' @4 N+ i
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