How to test an RCD module in a CU?

Lobster · 2007-09-06T13:45:29+00:00

I've recently fitted a split load CU (Screwfix 82204) to a new installation and am having problems with the RCD module. As soon as I turn on the CU's main switch, the RCD trips, even when all the circuits are switched off or disconnected.Have checked wiring of the CU and RCD, and that looks OK. Is there anything that could cause this problem other than a faulty RCD module? I don't know how likely that is, but what I'd like to know is how I can test the RCD definitively and safely.The CU is unused but have had it 'in stock' for some time so I'll probably have to buy a new RCD if it's duff - hence I'd like to be sure.ThanksDavid

Sep 06, 2007 20 Replies

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John Rumm 18 years ago

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How to test an RCD module in a CU?

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