It should not buzz, normally.
Brian

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"Dave Plowman (News)" wrote in message
...
In article l.net,
Dave Liquorice wrote:
On Sun, 01 Nov 2020 11:27:49 +0000 (GMT), Dave Plowman (News) wrote:

Have a two gang RCD protected metal clad socket in the conservatory
which has failed - RCD will no longer latch on.

I'll ask the stupid questions:

Won't latch on with nothing plugged in?

Correct.

Checked nothing untoward in the wiring?

I'd be most surprised if anything has changed there.

It has got power? Some RCDs won't latch without power and unlatch
when power is lost (maybe a fail safe feature of plugin units only
though).

It sometimes buzzes. Very unlikely both sides of the rings have failed -
while everything else on it works OK.

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