chris French wrote:
In message , John Rumm
writes
chris French wrote:

I'm thinking that maybe my RCD isn't doing it's job properly? (We
have a TT earth system with just one main incoming RCD - about as
old looking as the CU) The test button works ok though.

Are you sure it is a RCD and not an older "voltage operated" ELCB?

No I'm not.

There is a picture of a common one he
http://wiki.diyfaq.org.uk/index.php?title=RCD#ELCB

In fact it looks exactly like that.....

Aha, the plot thickens... ;-)

Like Andy said these can fail to operate for a number of reasons. So it
is possible to have a live to earth fault and not have it trip.

First job sounds like finding the live to earth fault. You can worry
about replacing the ELCB with something else after!


--
Cheers,

John.

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