标题: 接地问题： [打印本页] 作者: 万能科技 时间: 2012-1-19 12:05 标题: 接地问题： 请教：是美规灯具符合UL1598标准，
请问：如果一个挂墙灯的外壳是塑料的1类灯具，是不是不用接地的呢？在换灯泡时打开玻璃外壳就可以换，所以在维修等情况下不会接触到带电体，故请问这样的灯具可否不接地呢？
根据UL1598 6.14接地和连接中所说：灯具易触及的但同带电部件隔离开的非载流金属部件不用接地。这句话的意思是不是说外壳是绝缘的就不用接地了呢？作者: jason1031 时间: 2012-1-19 12:05
6.14 Grounding and bonding
6.14.1 General
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.