In an earlier contribution to this discussion,
Andy Wade wrote:

Andrew Gabriel wrote:

Possibly some part of the earth leakage pathed has been burned out
now. Maybe the leakage is only marginal against the breaker's trip
level.

Or perhaps something that got wet and has now dried out?

Sensitive "earth leakage" clamp meters like this
http://www.martindale-electric.co.uk/clamp.htm#cm67
are now being promoted as a good way of tracing faults causing RCDs
to trip.


Fascinating! Can you hire them - 'cos you could replace quite a lot of
potentially faulty kit for the £300 cost of buying one?
--
Cheers,
Roger
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