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首先确定, I 类灯具 和 I类结构是不同概念,一类灯具是要把metal enclosure 接到 保护接地terminals 上(定义),
( A8 K) S, d$ _+ z2 S) }6 xI 类 结构说个例子,驱动,全部是塑料外壳,有保护接地terminal 接到SPD,没有接到塑料外壳上,这种情况是可能的* X Z; c; y5 [& w3 V8 i: g0 b
Controlgear with an integrated SPD requiring connection to earth shall be marked with the
9 Q! J+ Y# Q- i& q, v+ ?* eprotective earth symbol according to IEC 60417-5019: 2006-08.
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) U1 G$ k, f0 p( b1 r4 [60598-1 中class II 中的定义 Note,也说这情况是存在的
# C3 W" _* B% a) SNote 4 to entry: If a luminaire with double insulation and/or reinforced insulation throughout has a protective earthing terminal or a protective earthing contact, it is class I construction' t, l; L; o, z; \, }
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