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Do-It-Yourself (DIY) Question & Answer Forum
RCD Testing
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<blockquote data-quote="TJH" data-source="post: 490494" data-attributes="member: 32169"><p>I wired in an RCD for some underfloor heating. I know I wired it correctly and it tripped satisfactorily when tested. However the timer unit to which it was connected was not working. When I measured the voltage out of the RCD it was just 7 volts. It has 240v on the line side. I figured it was defective so bought another RCD. Same problem except that this RCD has 0 volts on the load side. I have checked the wiring continuity from RCD to the appliance and its all okay.</p><p></p><p>So 240volts in, RCD lights up okay and trips when test button is pressed. Fuse is okay but 0 volts out. It seems unlikely that I have two consecutive duds so can anyone advise how I test the RCD to establish whether it is indeed faulty. What else could I be doing wrong?</p></blockquote><p></p>
[QUOTE="TJH, post: 490494, member: 32169"] I wired in an RCD for some underfloor heating. I know I wired it correctly and it tripped satisfactorily when tested. However the timer unit to which it was connected was not working. When I measured the voltage out of the RCD it was just 7 volts. It has 240v on the line side. I figured it was defective so bought another RCD. Same problem except that this RCD has 0 volts on the load side. I have checked the wiring continuity from RCD to the appliance and its all okay. So 240volts in, RCD lights up okay and trips when test button is pressed. Fuse is okay but 0 volts out. It seems unlikely that I have two consecutive duds so can anyone advise how I test the RCD to establish whether it is indeed faulty. What else could I be doing wrong? [/QUOTE]
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