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Do-It-Yourself (DIY) Question & Answer Forum
testing Zs through RCD
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<blockquote data-quote="Robojin" data-source="post: 69322" data-attributes="member: 2209"><p>Yes ish, the resistance in my situation is a false reading, as you observe the methods employed by the various meter methods used to create a loop fault differ</p><p></p><p>But in this situation this importantly does not mean the RCD has failed, as confirmed by many conversations to several manufacturers and a lecturer this week</p><p></p><p>However if your Ze across the RCD was for example 0.18ohms in and 0.18ohms out, and your Zs on the circuit was much higher than the Ze+R1+R2 you would be looking a potential issue</p><p></p><p>I know this goes against the grain of what we have been taught, (it did for me) e.g. high reading = failure, but if you are unsure please feel free to contact your meter manufacturer's support team and make your own mind up, after all it's down to the signatory to confirm safety of the installation</p></blockquote><p></p>
[QUOTE="Robojin, post: 69322, member: 2209"] Yes ish, the resistance in my situation is a false reading, as you observe the methods employed by the various meter methods used to create a loop fault differ But in this situation this importantly does not mean the RCD has failed, as confirmed by many conversations to several manufacturers and a lecturer this week However if your Ze across the RCD was for example 0.18ohms in and 0.18ohms out, and your Zs on the circuit was much higher than the Ze+R1+R2 you would be looking a potential issue I know this goes against the grain of what we have been taught, (it did for me) e.g. high reading = failure, but if you are unsure please feel free to contact your meter manufacturer's support team and make your own mind up, after all it's down to the signatory to confirm safety of the installation [/QUOTE]
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testing Zs through RCD
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