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Do-It-Yourself (DIY) Question & Answer Forum
explanation if you please...
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<blockquote data-quote="ianmacd" data-source="post: 73798" data-attributes="member: 2977"><p>I would guess its got damp at some point and its tripping out but due to dirt/rust/something else, the switch is not moving enough to show it as off but a manual off/on fixes it. Could also check all the connections are tight in cu2 too (and no insulation is in the terminals).</p><p></p><p>You say cu2 is fed from cu1, is that from the 20A mcb for the sockets in cu1? Do the sockets work in both cabin1 and cabin2 even when the lights do not? If so, then I can not see how it could be the RCD otherwise both the sockets and the lights are off. If it is just the lights (sockets still work) then I would suspect the 6A mcb. Will the lights come on if the 6A mcb is turned off and the RCD too with the sockets left on (i.e. stopping power to the 6A mcb) as that could indicate some kind of quasi state the MCB gets itself into that de-energising it sorts out?</p><p></p><p>Ian.</p></blockquote><p></p>
[QUOTE="ianmacd, post: 73798, member: 2977"] I would guess its got damp at some point and its tripping out but due to dirt/rust/something else, the switch is not moving enough to show it as off but a manual off/on fixes it. Could also check all the connections are tight in cu2 too (and no insulation is in the terminals). You say cu2 is fed from cu1, is that from the 20A mcb for the sockets in cu1? Do the sockets work in both cabin1 and cabin2 even when the lights do not? If so, then I can not see how it could be the RCD otherwise both the sockets and the lights are off. If it is just the lights (sockets still work) then I would suspect the 6A mcb. Will the lights come on if the 6A mcb is turned off and the RCD too with the sockets left on (i.e. stopping power to the 6A mcb) as that could indicate some kind of quasi state the MCB gets itself into that de-energising it sorts out? Ian. [/QUOTE]
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