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EICR Tested - 2 weeks on, RCD keeps tripping
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 519942" data-attributes="member: 250"><p>If you have a single RCD protecting multiple circuits you cannot isolate or prove any circuits at all,</p><p></p><p>without disconnecting either neutral or earth conductors from the common bars inside the consumer unit...</p><p></p><p>Turning off the Live supply to a circuit does NOT isolate that circuit from the investigations..</p><p></p><p>As ALL of the neutrals and earths are common inside the consumer unit..</p><p></p><p>RCD's will trip on BOTH Live-&gt;Earth faults, and Neutral-&gt;Earth faults..</p><p></p><p>i.e Power running through a perfectly good circuit..</p><p></p><p>can trip a common RCD due to a fault in another circuit..</p><p></p><p>Bottom line is without a full RCBO equipped consumer unit, there is always an element of "Piss-in-the-wind" with fault investigations..</p><p></p><p>(Some of your efforts may just spray back down over your trouser leg rather than reaching their target and proving nothing at all!)</p><p></p><p> Guinness </p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 519942, member: 250"] If you have a single RCD protecting multiple circuits you cannot isolate or prove any circuits at all, without disconnecting either neutral or earth conductors from the common bars inside the consumer unit... Turning off the Live supply to a circuit does NOT isolate that circuit from the investigations.. As ALL of the neutrals and earths are common inside the consumer unit.. RCD's will trip on BOTH Live->Earth faults, and Neutral->Earth faults.. i.e Power running through a perfectly good circuit.. can trip a common RCD due to a fault in another circuit.. Bottom line is without a full RCBO equipped consumer unit, there is always an element of "Piss-in-the-wind" with fault investigations.. (Some of your efforts may just spray back down over your trouser leg rather than reaching their target and proving nothing at all!) Guinness [/QUOTE]
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EICR Tested - 2 weeks on, RCD keeps tripping
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