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<blockquote data-quote="leesparkykent" data-source="post: 430000" data-attributes="member: 26673"><p>I've seen neutral earth faults that stop the RCD from working correctly and also stop the test button from working. Ideally it should of been tested with the load disconnected as something plugged in could cause noise or if there is a capacitor or something of the likes could produce readings that are not acceptable and you might have a healthy RCD/RCBO. I cant remember the manufacturers of the top of my head (might be MEM) but you have to attach a fly lead to the RCBO for testing.........I couldn't tell you why though. RCD's/RCBO's can act in a strange way sometimes. </p></blockquote><p></p>
[QUOTE="leesparkykent, post: 430000, member: 26673"] I've seen neutral earth faults that stop the RCD from working correctly and also stop the test button from working. Ideally it should of been tested with the load disconnected as something plugged in could cause noise or if there is a capacitor or something of the likes could produce readings that are not acceptable and you might have a healthy RCD/RCBO. I cant remember the manufacturers of the top of my head (might be MEM) but you have to attach a fly lead to the RCBO for testing.........I couldn't tell you why though. RCD's/RCBO's can act in a strange way sometimes. [/QUOTE]
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