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<blockquote data-quote="Red Squirrel" data-source="post: 522610" data-attributes="member: 33673"><p>Thanks for the input [USER=34477]@JonesK[/USER] I have certainly learnt a lot about cumulative earth leakage over the past few weeks and your theory makes complete sense.</p><p></p><p>Although the only issue is the fact the local 16amp 30ma RCBO at the one pitch trips at the same time, this means quite a massive 'random' leakage I would assume to set off the 300ma RCD OR the RDC is already on the edge before this random leakage raises its head every full moon.</p><p></p><p>Sparky coming tomorrow so hopefully we will have some answers by then. I am going to put forward the points raised:</p><p></p><p>To avoid site wide blackouts:</p><p>Removing 300ma RCD to push tripping back to the local RCBO's at each pitch</p><p>OR Changing these to time delayed</p><p>AND in either case test the 300ma RCD for fault</p><p></p><p>Earth leakage test on 'problem' caravan - Hopefully will pickup a dodgy appliance or wiring - I highly doubt this but fingers crossed</p></blockquote><p></p>
[QUOTE="Red Squirrel, post: 522610, member: 33673"] Thanks for the input [USER=34477]@JonesK[/USER] I have certainly learnt a lot about cumulative earth leakage over the past few weeks and your theory makes complete sense. Although the only issue is the fact the local 16amp 30ma RCBO at the one pitch trips at the same time, this means quite a massive 'random' leakage I would assume to set off the 300ma RCD OR the RDC is already on the edge before this random leakage raises its head every full moon. Sparky coming tomorrow so hopefully we will have some answers by then. I am going to put forward the points raised: To avoid site wide blackouts: Removing 300ma RCD to push tripping back to the local RCBO's at each pitch OR Changing these to time delayed AND in either case test the 300ma RCD for fault Earth leakage test on 'problem' caravan - Hopefully will pickup a dodgy appliance or wiring - I highly doubt this but fingers crossed [/QUOTE]
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