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Called out last night
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<blockquote data-quote="NozSpark" data-source="post: 10134" data-attributes="member: 601"><p>Got a call out last night (tripping RCD). Narrowed it down to one particular socket circuit - 3 cables into MCB r1 0.43 - rn 0.44 - r2 0.69 (r1 to r1 of spur 23k WTF!!) and that's with the earths an neutrals disconnected also!!</p><p></p><p>Checking IR I got 0.01 L-E on the ring and started to try and locate the fault, after splitting the ring at some sockets I still had a fault at 6 sockets, I disonnected these and they still had a low IR!!</p><p></p><p>All bar 1 or 2 sockets had 2 cables and are not spurs!! god knows how many JB's and their configuration lies under the suspended floor, also cables are old imperial PVC so I have recommended a rewire.</p></blockquote><p></p>
[QUOTE="NozSpark, post: 10134, member: 601"] Got a call out last night (tripping RCD). Narrowed it down to one particular socket circuit - 3 cables into MCB r1 0.43 - rn 0.44 - r2 0.69 (r1 to r1 of spur 23k WTF!!) and that's with the earths an neutrals disconnected also!! Checking IR I got 0.01 L-E on the ring and started to try and locate the fault, after splitting the ring at some sockets I still had a fault at 6 sockets, I disonnected these and they still had a low IR!! All bar 1 or 2 sockets had 2 cables and are not spurs!! god knows how many JB's and their configuration lies under the suspended floor, also cables are old imperial PVC so I have recommended a rewire. [/QUOTE]
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