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<blockquote data-quote="binky" data-source="post: 521857" data-attributes="member: 490"><p>so the earth leakage tripping the 300mA RCD could be the combination of leakage from everything electical across the whole site. It could also just be a fault that occurs when its cold and damp, combined with earth leakage across the whole site. </p><p></p><p>As said above, you need someone with earth leakage test gear to see if it's one particular cct or a combination.</p><p></p><p>Personally I think you have rather too much stuff on a single 300mA to offer a reliable system as you are finding out. I'm trying to think of a cost effective way of improving the situation, but it maybe possible to get rid of the 300mA and put RCBOs onto the distribution ccts instead. I need to consult the regs book, I don't get involved with caravan sites, and they have some specitic regs. </p><p></p><p>It would also appear you have a TT set up, hence the 300mA RCD on the incoming supply, ie you have your own earth rod rather than an earth supplied by the DNO for your area. Sometimes it is possible to get that changed by the DNO, and get rid of the 300mA RCD, but it's dependent on the electrical cabling in your area.</p></blockquote><p></p>
[QUOTE="binky, post: 521857, member: 490"] so the earth leakage tripping the 300mA RCD could be the combination of leakage from everything electical across the whole site. It could also just be a fault that occurs when its cold and damp, combined with earth leakage across the whole site. As said above, you need someone with earth leakage test gear to see if it's one particular cct or a combination. Personally I think you have rather too much stuff on a single 300mA to offer a reliable system as you are finding out. I'm trying to think of a cost effective way of improving the situation, but it maybe possible to get rid of the 300mA and put RCBOs onto the distribution ccts instead. I need to consult the regs book, I don't get involved with caravan sites, and they have some specitic regs. It would also appear you have a TT set up, hence the 300mA RCD on the incoming supply, ie you have your own earth rod rather than an earth supplied by the DNO for your area. Sometimes it is possible to get that changed by the DNO, and get rid of the 300mA RCD, but it's dependent on the electrical cabling in your area. [/QUOTE]
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