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Why is RCD tripping after replacing light fitting?
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<blockquote data-quote="ProDave" data-source="post: 551569" data-attributes="member: 6969"><p>did you wire the new light EXACTLY the same as the old one?</p><p></p><p>It sounds to me like you had loop at light, and you have connected all the reds together and all the blacks together (or brown and blue depending on age) so now you have the light switch in parallel with the light causing a short circuit when you turn it off, hence the mcb trips. </p><p></p><p>If so it is a wonder the switch contacts have not welded yet.</p><p></p><p>Picture on light wiring will confirm or deny that theory.</p><p></p><p>EDIT S.L beat me to it with the same theory.</p></blockquote><p></p>
[QUOTE="ProDave, post: 551569, member: 6969"] did you wire the new light EXACTLY the same as the old one? It sounds to me like you had loop at light, and you have connected all the reds together and all the blacks together (or brown and blue depending on age) so now you have the light switch in parallel with the light causing a short circuit when you turn it off, hence the mcb trips. If so it is a wonder the switch contacts have not welded yet. Picture on light wiring will confirm or deny that theory. EDIT S.L beat me to it with the same theory. [/QUOTE]
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Why is RCD tripping after replacing light fitting?
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