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Do-It-Yourself (DIY) Question & Answer Forum
Intermittently Tripping RCD
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<blockquote data-quote="Revved Up Sparky" data-source="post: 118854" data-attributes="member: 5050"><p>The test results look fine to me. The R1+R2 for the ring will indeed vary with the highest reading occuring when you get to sockets near/ at the middle of the ring and the lowest readings near the ring ends. The R1+R2 should match up fairly well with your end to end ring continuity readings L-L + E-E divided by 4.</p><p></p><p>The insulation resistance results look fine even with 38megohms N-E.</p><p></p><p>I would conclude from the results taken that the installation is fine, therefore the logical step for me would be to disconnect all loads, ie, unplug every portable appliance and switch off every isolator before slowly and systematically switching loads back into each circuit whilst looking for the RCD to trip again.</p></blockquote><p></p>
[QUOTE="Revved Up Sparky, post: 118854, member: 5050"] The test results look fine to me. The R1+R2 for the ring will indeed vary with the highest reading occuring when you get to sockets near/ at the middle of the ring and the lowest readings near the ring ends. The R1+R2 should match up fairly well with your end to end ring continuity readings L-L + E-E divided by 4. The insulation resistance results look fine even with 38megohms N-E. I would conclude from the results taken that the installation is fine, therefore the logical step for me would be to disconnect all loads, ie, unplug every portable appliance and switch off every isolator before slowly and systematically switching loads back into each circuit whilst looking for the RCD to trip again. [/QUOTE]
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Intermittently Tripping RCD
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