John Rumm wrote:
On 01/02/2021 09:36, Harry Bloomfield wrote:
John Rumm formulated on Sunday :
I did try some experiments a while back to see if I could trick it
into giving a false reading. I could not get a false negative out of
it, but did manage one false positive - although had to try hard!

http://wiki.diyfaq.org.uk/index.php/...ck_experiments

They are the best thing since sliced bread, if you thoroughly understand
fully their limitations.

I find the "beep" facility quite handy at times - plomp it down close to
a circuit you want to turn off, go to (typically unlabelled) CU, and
turn off MCBs until the bleeping stops!

As I have changed and updated the wiring in our house I have labelled
everything as I go. After 20 years of living here it now means just
about everything is labelled. I have even put little stickers on the
top edge of sockets to indicate which MCB/RCD feeds them.

I do check as well when working (i.e. have a lamp plugged in on the
circuit) but it saves a *lot* of time being able to go straight to the
right switch in the CU.

--
Chris Green
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