Mark wrote:

Besides, the only other circuit that would warrant protection is the
immersion heater. A split load for 2 circuits? Well, i suppose it is an
option.

I would not put an immersion on an RCD. If the RCD is shared its asking
for trouble. And it really gains nothing in safety terms. Contrary to
popular assumption its quite ok for a split immersion heater to pass
the heating current straight through the water. Its very common, and
no-one gets injured this way.

Those without understnading of the subject never believe it, but tis
so. And it happens commonly.


NT