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Earth Leakage - Martindale Clamp Meter
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<blockquote data-quote="Luckyboy" data-source="post: 554709" data-attributes="member: 34072"><p>Hi all</p><p></p><p>I recently attended to a call-out to intermittent RCD tripping on a dual RCD board.</p><p>Got out my Martindale CM69 TRMS Earth Leakage Clamp Meter and put them around the tails and switched on a circuit at a time, the leakage was significant, hundreds of milliamps, RCD didn't trip.</p><p>Measured insulation resistance to all circuits, all above min. 1 mega ohm.</p><p>Owner said it trips randomly but started over the weekend when it was raining rather heavily. </p><p></p><p>Any ideas on why my clamp meter is showing such large leakage with the RCD not tripping? </p><p></p><p>FYI I have "zeroed" the meter, it is less than a year old and in good condition.</p></blockquote><p></p>
[QUOTE="Luckyboy, post: 554709, member: 34072"] Hi all I recently attended to a call-out to intermittent RCD tripping on a dual RCD board. Got out my Martindale CM69 TRMS Earth Leakage Clamp Meter and put them around the tails and switched on a circuit at a time, the leakage was significant, hundreds of milliamps, RCD didn't trip. Measured insulation resistance to all circuits, all above min. 1 mega ohm. Owner said it trips randomly but started over the weekend when it was raining rather heavily. Any ideas on why my clamp meter is showing such large leakage with the RCD not tripping? FYI I have "zeroed" the meter, it is less than a year old and in good condition. [/QUOTE]
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