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Could the 30% leakage requirement on rcd, s, combined with the inevitable increase in kitchen appliances with intentional leakage built in, force designers to replace rings with radial circuits?
Discuss Ring circuits to be retired? in the UK Electrical Forum area at ElectriciansForums.net
Firstly, a pretty definitive response from the forum. Secondly I heard the suggestion when watching a "voltimum" webinair on RCD, s. The suggestion was that two radials replacing one ring would double the available leakage. It sounded reasonable to me(OP) I don't quite follow your thinking. The direction of travel has been dividing installations up into multiple sockets circuits for some time, but I don't see why that would necessarily mean rings would become radials, at least at the design stage.
I see what you mean now and that does make sense. I thought you meant one ring becomes one radial.Firstly, a pretty definitive response from the forum. Secondly I heard the suggestion when watching a "voltimum" webinair on RCD, s. The suggestion was that two radials replacing one ring would double the available leakage. It sounded reasonable to me
Of course it would, but the question is it needed?The suggestion was that two radials replacing one ring would double the available leakage. It sounded reasonable to me
Honestly, I have never calculated it. I consider the type of installation and tend to use my "gut". But your point about rcbo populated DB, s really is the solution. It really does"future proof" installations against any issues with nuisance trippingJust to add the 30% (i.e. around 10mA) max limit has been in the regs for some years, not sure how often anyone actually calculates what it means in real life!
For CU changes you can always use a clamp meter per circuit to get an idea of the present-day situation, but as above I expect many households won't have issues.Honestly, I have never calculated it. I consider the type of installation and tend to use my "gut". But your point about rcbo populated DB, s really is the solution. It really does"future proof" installations against any issues with nuisance tripping
Reply to Ring circuits to be retired? in the UK Electrical Forum area at ElectriciansForums.net
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