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Borrowed Neutral
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<blockquote data-quote="Brian 157" data-source="post: 81566" data-attributes="member: 2251"><p>I've come across borrowed neutrals a couple of times in larger installations where the neutral has been connected to another DB completely, once a colleague got a belt from the neutral block of an isolated DB &amp; once when breaking the neutral link on a 3-phase db for IR testing I noticed sparks. In both cases putting a test lamp between the neutral &amp; earth blocks showed 230v, highlights the reason for testing between neutral &amp; earth when carrying out safe isolation!</p></blockquote><p></p>
[QUOTE="Brian 157, post: 81566, member: 2251"] I've come across borrowed neutrals a couple of times in larger installations where the neutral has been connected to another DB completely, once a colleague got a belt from the neutral block of an isolated DB & once when breaking the neutral link on a 3-phase db for IR testing I noticed sparks. In both cases putting a test lamp between the neutral & earth blocks showed 230v, highlights the reason for testing between neutral & earth when carrying out safe isolation! [/QUOTE]
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