aftergrow 发表于 2015-2-4 17:31

UL153 24.1理解

A live part and a dead metal part that is able to be grounded, the spacing shall not be less
than 3/64 inch (1.2 mm) between the isolated dead metal part and any one of the other parts
previously mentioned, provided the total spacing between the isolated dead metal part and the
two other parts is not less than 1/4 inch (6.4 mm) through air or 3/8 inch (9.5 mm) over surface.

准备做一个UL153灯具，对电气距离的例外2要求，真心搞不懂，几个同事讨论下，结果还是不明朗，有专家解释下上面这段话到底是什么意思啊？

yyrwj 发表于 2015-3-11 15:59

我的理解如附图

peter1715 发表于 2015-3-11 16:12

yyrwj 发表于 2015-3-11 15:59 static/image/common/back.gif
我的理解如附图

这个绝缘金属怎么理解，是基本绝缘的金属，还是加强绝缘的金属

yyrwj 发表于 2015-3-11 16:21

这条标准里没有说要怎么样的绝缘，按UL153 25条理解，应该只要达到厚度0.8mm就够了吧.
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