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Do-It-Yourself (DIY) Question & Answer Forum
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 559895" data-attributes="member: 250"><p>What made you even think about trying to measure anything on the earth? </p><p>What was NOT working that made you start your investigations?</p><p></p><p>How are you actually measuring this current ? (or are you measuring a voltage?)</p><p>i.e. where area the meter probes and what setting is it on ?</p><p>Ohms / AC voltage / AC current / DC voltage / DC current ?</p><p></p><p>My gut feeling is that you don't actually have any current anywhere...</p><p>you are just reading an induced voltage from either the feed or a strapper wires between the switches. </p><p></p><p>If the RCD CU was fitted and tested correctly 2 years ago, then the RCD would be tripping as soon as it detects a 30ma fault current in any of the earths..</p><p></p><p>I would never recommend changing any random parts during any fault investigations..</p><p>All it does is waste time and money..</p><p></p><p>Its far better to do correct testing and verify which part(s) is/are working and which part(s) is/are not..</p><p>Then fit replacements of known faulty items.</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 559895, member: 250"] What made you even think about trying to measure anything on the earth? What was NOT working that made you start your investigations? How are you actually measuring this current ? (or are you measuring a voltage?) i.e. where area the meter probes and what setting is it on ? Ohms / AC voltage / AC current / DC voltage / DC current ? My gut feeling is that you don't actually have any current anywhere... you are just reading an induced voltage from either the feed or a strapper wires between the switches. If the RCD CU was fitted and tested correctly 2 years ago, then the RCD would be tripping as soon as it detects a 30ma fault current in any of the earths.. I would never recommend changing any random parts during any fault investigations.. All it does is waste time and money.. Its far better to do correct testing and verify which part(s) is/are working and which part(s) is/are not.. Then fit replacements of known faulty items. [/QUOTE]
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