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Warmup Underfloor heating issue
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<blockquote data-quote="Murdoch" data-source="post: 490410" data-attributes="member: 24445"><p>So you have an upfront RCD, which means it will trip at anywhere between 22mA and 30 mA across all the circuits.</p><p></p><p>a fault on any circuit could be causing this, the underfloor heating could simply be “pushing” the leakage over the threshold to trip.</p><p></p><p>you need to locate a local spark who has an earth leakage clamp meter to check the leakage, then narrow down to circuits and do proper IR tests</p><p></p><p>one solution would be to replace the rcd with a 100a do switch and RCBO’s for each of the circuits ..... or a new unit.</p><p></p><p>if you go for a new CU do not agree to a dual rcd unit</p></blockquote><p></p>
[QUOTE="Murdoch, post: 490410, member: 24445"] So you have an upfront RCD, which means it will trip at anywhere between 22mA and 30 mA across all the circuits. a fault on any circuit could be causing this, the underfloor heating could simply be “pushing” the leakage over the threshold to trip. you need to locate a local spark who has an earth leakage clamp meter to check the leakage, then narrow down to circuits and do proper IR tests one solution would be to replace the rcd with a 100a do switch and RCBO’s for each of the circuits ..... or a new unit. if you go for a new CU do not agree to a dual rcd unit [/QUOTE]
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