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Borrowed Neutral test - sense check.
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<blockquote data-quote="DRW" data-source="post: 439889" data-attributes="member: 28653"><p>Hi, I don't wish to open the 'borrowed neutrals' can of worms again but I'd just like a more experienced testers view of how to test for them.</p><p></p><p>I've not done my 2391 but I'm hoping my logic will prevail.</p><p></p><p>To test for a borrowed neutral would it work to:</p><p></p><p>Disconnect N on lighting circuit 1 and switch off CB while leaving circuit 2 live and all connected.</p><p></p><p>Check which lights all work on circuit 2 then reverse the test to ascertain the fittings on circuit 1.</p><p></p><p>re-connect both circuits as they were originally, make circuit 1 live while leave 2 off and visa versa and see if any of the lights suddenly do work on the 'wrong' circuits?</p><p></p><p>I'm assuming that if the landing/hall lamp neutral were borrowed it wouldn't work on either of the first 2 tests but would at the end?</p><p></p><p>I'm assuming a barrage of corrections and questioning of parentage but I'm asking because I need correcting/confirming.</p><p></p><p>Thanks</p><p></p><p>Dave </p></blockquote><p></p>
[QUOTE="DRW, post: 439889, member: 28653"] Hi, I don't wish to open the 'borrowed neutrals' can of worms again but I'd just like a more experienced testers view of how to test for them. I've not done my 2391 but I'm hoping my logic will prevail. To test for a borrowed neutral would it work to: Disconnect N on lighting circuit 1 and switch off CB while leaving circuit 2 live and all connected. Check which lights all work on circuit 2 then reverse the test to ascertain the fittings on circuit 1. re-connect both circuits as they were originally, make circuit 1 live while leave 2 off and visa versa and see if any of the lights suddenly do work on the 'wrong' circuits? I'm assuming that if the landing/hall lamp neutral were borrowed it wouldn't work on either of the first 2 tests but would at the end? I'm assuming a barrage of corrections and questioning of parentage but I'm asking because I need correcting/confirming. Thanks Dave [/QUOTE]
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