出美国灯具是否一定要有地线?
UL1598灯具部分外壳是压铸件,是否可以不接地?要符合什么要求,是不是和欧洲一样要双绝缘? 一类灯具一定要接地，二类的就不用，用双重绝缘或是加强绝缘即可，如果是三类灯具也不用接地。 UL1598里面也不分一类或二类灯具 “一类灯具一定要接地，二类的就不用，用双重绝缘或是加强绝缘即可，如果是三类灯具也不用接地。”这是欧洲标准 同意楼上的，美国灯具本来就没有分类嘛我现在都不知道标签要怎么打呢？ UL1598里面规定一定要接地：
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.
6.14.1.2 The following parts are not required to be bonded to ground:
(a) the links of a metal chain used to support a pendant luminaire;
(b) accessible non-current-carrying metal parts of luminaire components (for example, lampholders and switches) that are isolated from live parts; or
(c) decorative parts, metal guards, and metal shades that do not enclose live parts.
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。 先想搞清楚，楼主到底问的是是否一定有地线？还是是否一定要接地？
前者，答案是否定的。可以不用地线达到接地效果。
后者，要看结构而定。如6楼所贴，满足两个条件需要接地：1）可触摸；2）可能带电，两者缺一不可。如楼主所言，条件1已经满足。条件2是否满足要看结构。通常里面用的都是AWM，而且不被固定，所以2通常会满足，通常要接地 引用第6楼sinian519于2008-06-27 12:49发表的:
UL1598里面规定一定要接地：
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.
6.14.1.2 The following parts are not required to be bonded to ground:
(a) the links of a metal chain used to support a pendant luminaire;
(b) accessible non-current-carrying metal parts of luminaire components (for example, lampholders and switches) that are isolated from live parts; or
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同意6楼的看法 出口美国UL1598灯具无论是否有压铸件或其它金属件都须接地，出非是特低电压就可以不用，只要工作电压超过36V就需要接地。 一类灯具一定要接地，二类的就不用，用双重绝缘或是加强绝缘即可，如果是三类灯具也不用接地。”这是欧洲标准
