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Borrowed Neutral
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 2831" data-attributes="member: 250"><p><em>1) Switch all lights</em></p><p></p><p><em>2) Switch off all breakers off/remove fuses.</em></p><p></p><p><em>3) Remove neutrals one group at a time and check continuity to neutral bus bar. If there is continuity there is a borrowed neutral. Mark neutral.</em></p><p></p><p><em>4) Continue until all checked.</em></p><p></p><p>Hi guys...</p><p></p><p>not sure these 4 steps are strictly correct...</p><p></p><p>A borrowed neutral actually means that two phase (or live supplies)</p><p></p><p>connected to two independant loads</p><p></p><p>then make the return path to the CU via one neutral wire.</p><p></p><p>(more a shared neutral really)</p><p></p><p>so step (3) checking continuity between neutrals and the N bar would not neccesarily show a reading!</p><p></p><p>With the lights switched ON, (all bulbs known to be working).</p><p></p><p>all breakers &amp; power off</p><p></p><p>and all neutrals diss'd at CU.</p><p></p><p>the continuity would be between the two lighting circuit outgoing phase conductors.</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 2831, member: 250"] [I]1) Switch all lights[/I] [I]2) Switch off all breakers off/remove fuses.[/I] [I]3) Remove neutrals one group at a time and check continuity to neutral bus bar. If there is continuity there is a borrowed neutral. Mark neutral.[/I] [I]4) Continue until all checked.[/I] Hi guys... not sure these 4 steps are strictly correct... A borrowed neutral actually means that two phase (or live supplies) connected to two independant loads then make the return path to the CU via one neutral wire. (more a shared neutral really) so step (3) checking continuity between neutrals and the N bar would not neccesarily show a reading! With the lights switched ON, (all bulbs known to be working). all breakers & power off and all neutrals diss'd at CU. the continuity would be between the two lighting circuit outgoing phase conductors. [/QUOTE]
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