原文 :
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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