AL_n wrote:
"ARWadsworth" wrote in
:

Maybe the MCB is "tired" and will not switch on when under load? It
is not uncommon.



That seems like a plausible explanation. I wasn't aware of that
phenomenon.

Hopefully all will be well from now on! BTW, my circuit breakers are
plugged into an old-style fuse box.




It's not one of the more recent
consumer units that flips their MCB's every time someone breathes too
heavily.

IMHO the type of MCBs you have (plug in Wlylex fuse replacements?) are the
sort of MCBs that often fail to turn on when under load.


--
Adam