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Do-It-Yourself (DIY) Question & Answer Forum
Downstairs Mains RCBO Tripping
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 559114" data-attributes="member: 250"><p>From my general experience its more likely that the RCBO is functioning correctly....</p><p>i.e. it is detecting an earth leakage fault, (which could be as low as 16ma but more probably 30ma or greater),</p><p> and as you haven't actual done any circuit testing yet...</p><p>Or RCBO testing.. (or if you have you haven't told us the results)..</p><p> Then it is pretty much guesswork?</p><p></p><p>If you don't have access to, or knowledge of how to use electrical circuits testers,</p><p>such as RCD testers, Insulation resistance testers.. Then you probably need to call in an electrician..</p><p></p><p>At the most basic level seeing if the RCBO will hold on with no load wiring connected,</p><p>could be a first step without any test equipment...</p><p></p><p>But after that without proper testing, you are guessing and assuming and can end up in the trap of swapping random parts..</p><p>which is an expensive and time wasting exercise!!</p><p></p><p>Personally I would never recommend any DIY person opens up a consumer unit to do any work inside of it..</p><p></p><p>Whereas a competent person with proper test meters..</p><p>Could verify both the RCBO and the PIR functionality, and probably make good headway into resolving the actual cause(s),</p><p>all within a standard minimum 1hour call-out!</p><p></p><p>A switch stuck in the on position is unlikely to cause an RCBO or RCD to trip.</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 559114, member: 250"] From my general experience its more likely that the RCBO is functioning correctly.... i.e. it is detecting an earth leakage fault, (which could be as low as 16ma but more probably 30ma or greater), and as you haven't actual done any circuit testing yet... Or RCBO testing.. (or if you have you haven't told us the results).. Then it is pretty much guesswork? If you don't have access to, or knowledge of how to use electrical circuits testers, such as RCD testers, Insulation resistance testers.. Then you probably need to call in an electrician.. At the most basic level seeing if the RCBO will hold on with no load wiring connected, could be a first step without any test equipment... But after that without proper testing, you are guessing and assuming and can end up in the trap of swapping random parts.. which is an expensive and time wasting exercise!! Personally I would never recommend any DIY person opens up a consumer unit to do any work inside of it.. Whereas a competent person with proper test meters.. Could verify both the RCBO and the PIR functionality, and probably make good headway into resolving the actual cause(s), all within a standard minimum 1hour call-out! A switch stuck in the on position is unlikely to cause an RCBO or RCD to trip. [/QUOTE]
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