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UL1598里面规定一定要接地:% |5 A7 E1 _) E6 f4 U' {, y
6.14.1.1 Non-current-carrying metal parts and metallized polymeric parts that are accessible during user maintenance or component replacement without the use of tools and that can involve the risk of shock shall be bonded to ground and shall comply with the bond impedance test of Clause 17.2.
* L/ A7 A8 u2 b! P% q: s6.14.1.2 The following parts are not required to be bonded to ground:
0 d' q* ?- P7 O, I( y& w4 }7 k6 \(a) the links of a metal chain used to support a pendant luminaire;3 D& r$ A& R* U( c' B I- n
(b) accessible non-current-carrying metal parts of luminaire components (for example, lampholders and switches) that are isolated from live parts; or4 h8 ^' M% V. c3 l3 B* }8 r
(c) decorative parts, metal guards, and metal shades that do not enclose live parts.6 k. V5 C( w: Q) M& b3 r
就是说灯具中所有的不带电的金属或金属处理过的塑料都要接地,除非是吊灯的铁链,装饰性部件,金属防护罩,金属灯罩,或灯座、开关等隔离的不带电金属部件。 |
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