标题: clause 27.3 [打印本页] 作者: 小猫咪 时间: 2015-8-24 19:53 标题: clause 27.3 本帖最后由 小猫咪 于 2015-8-25 11:01 编辑 0 K$ v5 N, }6 y. Z# Q+ Z+ `+ [
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[attach]91957[/attach] # u2 a4 T* P9 z' F. |) T! l27.3 If a detachable part having an earth connection is plugged into another part of the + @# {& l- f1 U8 e3 J/ oappliance, the earth connection shall be made before the current-carrying connections are . g+ I- Y C( P2 T& |established. The current-carrying connections shall be separated before the earth connection 1 @$ h* L4 d# n! I0 }; ~2 E) jwhen removing the part.% _" d% `, g# q) d/ r: A0 k$ c( S
For appliances with supply cords, the arrangement of the terminals, or the length of the / g" k# B. B, }5 @. h2 wconductors between the cord anchorage and the terminals, shall be such that the currentcarrying( J7 l. @! B- Q4 _& K
conductors become taut before the earthing conductor if the cord slips out of the cord' S7 f9 u& E. Q. x+ ^4 x7 i. Y$ ]
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大家是怎么理解这两段内容的呢? ; \+ p% \3 o+ Y针对第一段是可拆卸的,就是类似于无绳熨斗累的,接地端子最后分离。 # B9 x, b7 u( r+ L4 @1 T; w7 C第二段, 是说载流导线要在接地导线之前被拉紧。 # j* M& [$ k, f, A2 e; ^问,如果是载流导线已经接到一个插片式的端子上了,是否要跳过这个端子去考虑?( W! H3 v; n0 o: M* ]* \
如图,途中所有的连接处都是插片式的。1 x* h$ N# ]. X! P' v+ ^ 作者: tzsn 时间: 2015-8-24 21:37
不太明白你说的跳过这个端子考虑是什么意思,能否描述得具体点,最好有个图作者: plmijb 时间: 2015-8-25 08:09
简单点说,第二点,地线要比L/N 线长些,(相对于固定点),L/N 线拉紧后,地线还未拉紧。作者: ylgc123 时间: 2015-8-25 08:43
精简的讲:①针对一个可拆卸的部件,接地要先通后断。②地线要比其他线长。作者: 热爱学习 时间: 2015-8-25 09:10