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Do-It-Yourself (DIY) Question & Answer Forum
RCD in consumer unit keeps popping, replaced with new one, still same issue
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<blockquote data-quote="Ardet R" data-source="post: 467772" data-attributes="member: 30040"><p>Your consumer unit has been extensively and inappropriately modified, presumably at a time when new electrical work was being done.</p><p></p><p>I attach a diagram to show that a fault on certain circuits only may be causing the RCD to trip.</p><p></p><p>As identified above you can use trial and error over time to try to identify specifically on which circuit the fault is located but faults to neutral will not be found by the method of switching off individual circuits for a period. Unplugging items connected to sockets or perhaps ensuring that the switch on what is probably an electric shower circuit may help.</p><p></p><p>Intermittent faults are hard to identify as the fault may not be present until the point of failure.</p><p></p><p>An electrician with an insulation resistance tester / earth leakage clamp meter may be able to narrow down the fault far more quickly. This is your best method of approach.</p><p></p><p>Common causes of RCD tripping are water getting into a connection and cable damage from overheating.</p><p></p><p>The fault is often in an appliance rather than the circuit.</p><p></p><p>A leak of 30mA of current to earth will cause an RCD to trip. This is to protect people from the chance of death by electric shock.</p><p></p><p>The RCD is performing its intended purpose correctly.</p><p></p><p>[ATTACH]9445[/ATTACH]</p></blockquote><p></p>
[QUOTE="Ardet R, post: 467772, member: 30040"] Your consumer unit has been extensively and inappropriately modified, presumably at a time when new electrical work was being done. I attach a diagram to show that a fault on certain circuits only may be causing the RCD to trip. As identified above you can use trial and error over time to try to identify specifically on which circuit the fault is located but faults to neutral will not be found by the method of switching off individual circuits for a period. Unplugging items connected to sockets or perhaps ensuring that the switch on what is probably an electric shower circuit may help. Intermittent faults are hard to identify as the fault may not be present until the point of failure. An electrician with an insulation resistance tester / earth leakage clamp meter may be able to narrow down the fault far more quickly. This is your best method of approach. Common causes of RCD tripping are water getting into a connection and cable damage from overheating. The fault is often in an appliance rather than the circuit. A leak of 30mA of current to earth will cause an RCD to trip. This is to protect people from the chance of death by electric shock. The RCD is performing its intended purpose correctly. [ATTACH]9445._xfImport[/ATTACH] [/QUOTE]
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RCD in consumer unit keeps popping, replaced with new one, still same issue
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