ivan wrote:

snip

There does appear to be some confusion across the pond about the electricity
supply used in the UK, here's a URL that may help throw a little bit of
light on the subject.

http://www.diydata.com/planning/ring_main/ring_main.htm

Hi Ivan...

Thanks for that; interesting reading. I guess the
confusion is understandable - what you do is
very different than what we do out here in the
colonies

I wish I knew a url to pass on to you so that you could
see how ours is done - given that I don't feel free to
ask anything you wish...

Take care.

Ken

PS - you're feeding something you folks call a
"shower"... if that what we might call an
(electric) water heater?