Re: RCD trip mode question
Yes, I would think you have one or two leaky appliances..
One tool which is useful for this is a PAT tester which can quickly show leakage. But of course you probably don't have one of those. So you will be left in going round all the candidates (cooker/washer/kettle - check whether water has got spilt into the base unit of the kettle, very common).
For what it is worth, my 30 year old MK RCD has only ever tripped if there has been a real fault.
Dave
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