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RCD keeps tripping for no apparent reason.
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<blockquote data-quote="Doc Hudson" data-source="post: 495312" data-attributes="member: 1607"><p>Quite probably just a faulty appliance connected to one of the circuits that the RCD also protects. If the RCD supplies more than one circuit then a fault cannot be isolated by simply turning one of the MCB's off. As all of the neutral and earths are still connected together at the fuse box. RCD's detect leakage to earth in very, very, very, small amounts of current, (in the range of miiamps). Your big problem is that a circuit with a Neutral to Earth fault that is turned off, can still cause an RCD to trip from power flowing to any other circuit that shares the same RCD. You have no easy means of isolating the neutrals from each circuit, by just using the switches on the front of the fuse box. Dedicated RCD's per circuit, (items called RCBO's), are the only way to be sure which circuit has the genuine fault that has tripped the device. So its not impossible, but it can be a bit tricky trying to trace the genuine cause.</p><p></p><p>Doc H. </p></blockquote><p></p>
[QUOTE="Doc Hudson, post: 495312, member: 1607"] Quite probably just a faulty appliance connected to one of the circuits that the RCD also protects. If the RCD supplies more than one circuit then a fault cannot be isolated by simply turning one of the MCB's off. As all of the neutral and earths are still connected together at the fuse box. RCD's detect leakage to earth in very, very, very, small amounts of current, (in the range of miiamps). Your big problem is that a circuit with a Neutral to Earth fault that is turned off, can still cause an RCD to trip from power flowing to any other circuit that shares the same RCD. You have no easy means of isolating the neutrals from each circuit, by just using the switches on the front of the fuse box. Dedicated RCD's per circuit, (items called RCBO's), are the only way to be sure which circuit has the genuine fault that has tripped the device. So its not impossible, but it can be a bit tricky trying to trace the genuine cause. Doc H. [/QUOTE]
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RCD keeps tripping for no apparent reason.
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