RCDs in series

Tim Downie · 2007-08-21T12:55:12+00:00

A friend of mine has a pond with pump & lights wired into a fused spur from the house ring-main (which is RCD protected). After some recent heavy rain (which probably managed to penetrate a supposedly "water-tight" outside junction-box, the RCD tripped, which wouldn't have been a problem if he hadn't been away on holiday at the time and the fact that the freezer was on same circuit.I wondered about changing the existing fused spur for another RCD (like this one ) but I see that it has the same 30mA trip current as the existing one in the main fuseboxWould I be right in thinking that this wouldn't necessarily stop the main fusebox RCD tripping?Would one with a lower (20mA say) trip current work (and do such things exist)?Tim

Aug 21, 2007 124 Replies

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Steve Firth 18 years ago

Then they cannot be mutually exclusive. Jings but you're dim.

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Doctor Drivel 18 years ago

Oh look! A shitkicker!

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Doctor Drivel 18 years ago

Choking smokers!!! A shitkicker!

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Andy Hall 18 years ago

Are you sure that you aren't getting out of your depth?

TLC and the MK rep have nice books with pictures that explain this. They are coloured with brown, blue, green and yellow as well. Ask them to drop some books off at your branch

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Doctor Drivel 18 years ago

Matt, the depth of the pins is not the problem, the shape is.

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