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Electrician Talk Forum
Anyone come across this very often ?
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 482548" data-attributes="member: 250"><p>I/ I doubt he's proved anything to be the cause..</p><p></p><p>2/ A floating earth wire could have any "apparent voltage" floating on it with a cheapo plumbers meter..</p><p></p><p>3/ There is a requirement in the regs to run a CPC to all accessory points.. If said item is ClassII they generally have a clump of brass with a hole in it and screw as somewhere the park the unused CPC. Other than that the CPC is doing nowt!</p><p></p><p>4/ The order of the LEN, LNE, NLE, NEL, ELN, ENL is purely down to the logistics and costs of the circuitry inside the accessory and how their gubbins connects easiest.</p><p></p><p>5/ Assume plumb-bob is an incompetent baffoon until you have proved other wise..</p><p></p><p>6/ Could easily be an earth fault anywhere else on the heating system, that only goes live because the thermostat has kicked in. thus causing a current to trip the RCD..</p><p></p><p>7/ Has the full circuit been IR tested... Has the RCD been tested... If Not.. BACK TO BASICS!</p><p></p><p> Guinness </p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 482548, member: 250"] I/ I doubt he's proved anything to be the cause.. 2/ A floating earth wire could have any "apparent voltage" floating on it with a cheapo plumbers meter.. 3/ There is a requirement in the regs to run a CPC to all accessory points.. If said item is ClassII they generally have a clump of brass with a hole in it and screw as somewhere the park the unused CPC. Other than that the CPC is doing nowt! 4/ The order of the LEN, LNE, NLE, NEL, ELN, ENL is purely down to the logistics and costs of the circuitry inside the accessory and how their gubbins connects easiest. 5/ Assume plumb-bob is an incompetent baffoon until you have proved other wise.. 6/ Could easily be an earth fault anywhere else on the heating system, that only goes live because the thermostat has kicked in. thus causing a current to trip the RCD.. 7/ Has the full circuit been IR tested... Has the RCD been tested... If Not.. BACK TO BASICS! Guinness [/QUOTE]
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Anyone come across this very often ?
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