In article
,
Bear wrote:
The trip can be reset first time after a trip, but last night I
switched off the MCBs and then the RCB and unplugged all appliances.
Then I switched on the RCB and MCBs. No problem until I started to
plug in devices. As more were plugged in the RCB tripped (I couldn't
isolate it down to either a device or socket). Resetting the trip
wasn't always possible first time - some times I had to wait 10
seconds or more before it would reset.

Have you got an ordinary DVM? If so try measuring the resistance between
earth pin and neutral, earth pin and line on all the suspect appliances.
Obviously with them unplugged - but switched on if they have a switch on
them. And report the results. Not as good as using an insulation tester -
but can often show a fault.

--
*Suicidal twin kills sister by mistake.

Dave Plowman London SW
To e-mail, change noise into sound.