On 17/10/2017 22:44, Yam man wrote:
replying to Andy Burns, Yam man wrote:
I've found an earth wire hanging just out of bathroom wall hidden behind
pedestal from sink this morning and pulled it through enough to wrap some
around the cooper pipe supplying my bathroom sink until buying earth clamp
tomorrow can this be some of cause?

I would not expect a disconnected equipotential bonding wire being
disconnected to cause a RCD trip in the absence of another fault.

See:

http://wiki.diyfaq.org.uk/index.php/...ng_and_Bonding


--
Cheers,

John.

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