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Do-It-Yourself (DIY) Question & Answer Forum
Circuit off but breaker not tripped - help please!
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 535778" data-attributes="member: 250"><p>Probably not dodgy wiring.... </p><p>More likely faulty (or failing appliance)</p><p></p><p>BUT..</p><p></p><p>A competent electrician could test the RCD, (the switch that tripped), which is there to detect very small electrical currents leaking to earth..</p><p>To verify the RCD is operating correctly within its specified electrical characteristics. </p><p>(RCD's can become over-sensitive and give nusiance tripping problems! )</p><p></p><p>Also do insulation resistance test on the circuits connected via the RCD..</p><p>to check there are no low resistance paths to earth that would cause and RCD to trip..</p><p></p><p>These tests could probably be carried out during a single first-hour call out charge...</p><p>which will vary depending upon whereabout in the county you are....</p><p>Could be £40-£50 for a local non-London based electrican..</p><p>Or could be double or more if more remote, longer travel, or deep in the heart of London? </p><p></p><p>From my general experience and gut-feeling, 90%+ of faults that cause an RCD to operate are appliance, rather than wiring related. </p><p> </p><p>I would suggest see how it goes before calling anyone out..</p><p>if it trips off again within a couple of weeks.. then maybe get someone in to check the RCD & Circuits..</p><p></p><p>BUT.. if it only trips when the microwave is on..</p><p>Get a new microwave!!!</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 535778, member: 250"] Probably not dodgy wiring.... More likely faulty (or failing appliance) BUT.. A competent electrician could test the RCD, (the switch that tripped), which is there to detect very small electrical currents leaking to earth.. To verify the RCD is operating correctly within its specified electrical characteristics. (RCD's can become over-sensitive and give nusiance tripping problems! ) Also do insulation resistance test on the circuits connected via the RCD.. to check there are no low resistance paths to earth that would cause and RCD to trip.. These tests could probably be carried out during a single first-hour call out charge... which will vary depending upon whereabout in the county you are.... Could be £40-£50 for a local non-London based electrican.. Or could be double or more if more remote, longer travel, or deep in the heart of London? From my general experience and gut-feeling, 90%+ of faults that cause an RCD to operate are appliance, rather than wiring related. I would suggest see how it goes before calling anyone out.. if it trips off again within a couple of weeks.. then maybe get someone in to check the RCD & Circuits.. BUT.. if it only trips when the microwave is on.. Get a new microwave!!! [/QUOTE]
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Circuit off but breaker not tripped - help please!
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