I have a private water supply which is pumped up to my house. Very
occasionally the RCD trips and I usually just rest it. However it now trips
almost every day and although I reset it I am concerned to know what is
causing this to happen.
Can anyone suggest how I can detect where the fault lies and what is causing
it to happen
If the RCD only feeds the pump then you need to be looking at a failing pump
or some damage to the cable that powers the pump.
is worth a read.
I have a similar problem with a garden fountain pump. About 50% of the time
it trips the RCD when switched OFF at the controlling light-type switch.
Some years ago I isolated the problem to the pump by removing it and other
things (garden lights and another pump) from the circuit, and then got the
supplier to change the pump... same result! I have just lived with it ever
since - a visit to the garage every time the fountain is switched off. It
never trips in use, only when turned off.
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