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看看I类灯具的定义,老老实实外壳接地吧。; v5 C( n9 U% f' G4 J4 v( h: e/ t
class I luminaire
! n9 l1 b# q: D, a; T2 Vluminaire in which protection against electric shock does not rely on basic insulation only, but E) h7 I8 b! Z& h1 \
which includes an additional safety precaution in such a way that means are provided for the; l C/ I$ A6 T0 e: N% F
connection of accessible conductive parts to the protective (earthing) conductor in the fixed
0 @: E. K, |+ C9 j6 W4 v j5 M/ L4 dwiring of the installation in such a way that accessible conductive parts cannot become live in( \+ p. I' ^3 `9 }
the event of a failure of the basic insulation
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