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Part P Competent Person Self-Certification Schemes
Installation resistance test querie
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<blockquote data-quote="binky" data-source="post: 453505" data-attributes="member: 490"><p>I spent many hours 1 day trying to trace a fault that turned out to be wet plaster. I would argue we are not required to test the resistance to the earth of the building, but resistance between conductors and CPC of that cable. Earths terminated at back boxes ( metal ones at least) would be connected to 'building earth' anyway. Given that CPCs are bare copper, a split in the insulation of a conductor and sheath should arc under test at 500V DC to the CPC anyway.</p><p></p><p>As it happens I usually can't be arsed to take CPCs out and test with them connected.</p></blockquote><p></p>
[QUOTE="binky, post: 453505, member: 490"] I spent many hours 1 day trying to trace a fault that turned out to be wet plaster. I would argue we are not required to test the resistance to the earth of the building, but resistance between conductors and CPC of that cable. Earths terminated at back boxes ( metal ones at least) would be connected to 'building earth' anyway. Given that CPCs are bare copper, a split in the insulation of a conductor and sheath should arc under test at 500V DC to the CPC anyway. As it happens I usually can't be arsed to take CPCs out and test with them connected. [/QUOTE]
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Part P Competent Person Self-Certification Schemes
Installation resistance test querie
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