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Do-It-Yourself (DIY) Question & Answer Forum
RCD tripping more since route of supply changed!
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 80960" data-attributes="member: 250"><p>If you wanted to read if there is any natural leakage occurring when appliances are in normal use, you would need to read the current flowing down the earth, CPC, But a normal clamp meter would not typically be able to read milliamp values..</p><p></p><p>so you would need to put a meter on a milliamp scale in series with the earth conductor.. (cuz as we all know... voltages read in parallel, Current read in series<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" />)</p><p></p><p>Easiest place to do this is at the MET (Main earth connection.).</p><p></p><p>Turn installation Off</p><p></p><p>Disconnect main earth connection, put your meter probes on your two ends of the earth, (MET, and Earth conductor).</p><p></p><p>Re-energise installtion...</p><p></p><p>see what current if any is flowing down the Earth conductor....</p><p></p><p>If there is zero Milliamp flowing...</p><p></p><p>Its may imply there is one single fault event somewhere that is occurring &amp; causing the trip..</p><p></p><p>If there is already a few miliamps... e.g. 10ma - 20ma,</p><p></p><p>could be a combination of various appliances each leaking a bit..</p><p></p><p>then one final one tips the balance!</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 80960, member: 250"] If you wanted to read if there is any natural leakage occurring when appliances are in normal use, you would need to read the current flowing down the earth, CPC, But a normal clamp meter would not typically be able to read milliamp values.. so you would need to put a meter on a milliamp scale in series with the earth conductor.. (cuz as we all know... voltages read in parallel, Current read in series;)) Easiest place to do this is at the MET (Main earth connection.). Turn installation Off Disconnect main earth connection, put your meter probes on your two ends of the earth, (MET, and Earth conductor). Re-energise installtion... see what current if any is flowing down the Earth conductor.... If there is zero Milliamp flowing... Its may imply there is one single fault event somewhere that is occurring & causing the trip.. If there is already a few miliamps... e.g. 10ma - 20ma, could be a combination of various appliances each leaking a bit.. then one final one tips the balance! [/QUOTE]
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RCD tripping more since route of supply changed!
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