Bear wrote:
On Jun 26, 12:05 pm, "Dave Plowman (News)"
wrote:
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.

Excellent idea. I do have a DVM - will try this upon returning home
this evening.

If you feel comfortable working in the CU, then you can also test for E
N shorts in the circuit that way as well. With everything disconnected
(i.e. unplugged) from the circuit, disconnect all wires of both ends of
the ring circuit, and measure resistance (with the meter on its highest
range) between the various ends. You should be able to verify that there
is no shorts between any conductor. You can also verify that you have
ring continuity between both ends of each conductor while you are at it
(low ohms range). If you can gustimate the circuit length you can
compare the results with:

http://wiki.diyfaq.org.uk/index.php?... istance_table



--
Cheers,

John.

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