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Oven heats to c. 120 C then trips rcd
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<blockquote data-quote="UNG" data-source="post: 493523" data-attributes="member: 8931"><p>Was this designed to Part P or BS7671</p><p></p><p>Installation with outbuildings!!!! I wonder how their RCD protection was designed in to the installation</p><p></p><p></p><p></p><p></p><p>So why are they not able to find the fault I would be worried if they were out of their depth. Although it is worrying that an electrical installation engineer comes to your job and says "it was the best quality install he'd seen and offered me a job" says a lot about his work and any work he has supervised</p><p></p><p></p><p></p><p></p><p>It would appear that you cannot do what you claim as it appears you do not have the necessary test equipment to do it so why make the statement</p><p></p><p>RCD's are not a perfect piece of equipment even brand new out of the box they can be faulty testing RCD's as little as 6 months after initial install they can give a totally different set of results and be faulty or over sensitive despite being within the requirements at installation. Try ramp testing the RCD you may find it's trip current is well below the 30mA threshold</p><p></p><p>From past experience general RCD's on circuits supplying cooking equipment can always be problematic I would swap this circuit to an RCBO to try and isolate the issue from a possible cumulative earth leakage of the other circuits, this is something which should have been considered at the design stage</p></blockquote><p></p>
[QUOTE="UNG, post: 493523, member: 8931"] Was this designed to Part P or BS7671 Installation with outbuildings!!!! I wonder how their RCD protection was designed in to the installation So why are they not able to find the fault I would be worried if they were out of their depth. Although it is worrying that an electrical installation engineer comes to your job and says "it was the best quality install he'd seen and offered me a job" says a lot about his work and any work he has supervised It would appear that you cannot do what you claim as it appears you do not have the necessary test equipment to do it so why make the statement RCD's are not a perfect piece of equipment even brand new out of the box they can be faulty testing RCD's as little as 6 months after initial install they can give a totally different set of results and be faulty or over sensitive despite being within the requirements at installation. Try ramp testing the RCD you may find it's trip current is well below the 30mA threshold From past experience general RCD's on circuits supplying cooking equipment can always be problematic I would swap this circuit to an RCBO to try and isolate the issue from a possible cumulative earth leakage of the other circuits, this is something which should have been considered at the design stage [/QUOTE]
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Oven heats to c. 120 C then trips rcd
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