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MCB/RCD on consumer unit tripping
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 506043" data-attributes="member: 250"><p>The above method of testing can be a bit hit &amp; miss if there is, as I suspect, multiple circuits sharing the same RCD... </p><p></p><p>e.g. traditional split-load or dual RCD board..</p><p></p><p>compared with a full RCBO board..</p><p></p><p>As you will have an abundance of parallel, Earth &amp; Neutral connections permanently made at the CU...</p><p></p><p>And as a lot of devices don't incorporate double-pole switching..</p><p></p><p>Any current flowing from a perfectly good, appliance on circuit 'A' 'B' or 'C' can make its way to Earth via a dodgy N-E connection on circuit 'D'..</p><p></p><p>So you can end up leading yourself up a wild goose chase thinking it is the appliance you have just turned on that caused the trip!</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 506043, member: 250"] The above method of testing can be a bit hit & miss if there is, as I suspect, multiple circuits sharing the same RCD... e.g. traditional split-load or dual RCD board.. compared with a full RCBO board.. As you will have an abundance of parallel, Earth & Neutral connections permanently made at the CU... And as a lot of devices don't incorporate double-pole switching.. Any current flowing from a perfectly good, appliance on circuit 'A' 'B' or 'C' can make its way to Earth via a dodgy N-E connection on circuit 'D'.. So you can end up leading yourself up a wild goose chase thinking it is the appliance you have just turned on that caused the trip! [/QUOTE]
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MCB/RCD on consumer unit tripping
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