On Fri, 22 Feb 2008 09:29:24 +0000, The Natural Philosopher
wrote:


Our RCDS dont use, or care, about ground.

What they care about is more current coming in one wire than goes out or
vice versa ;-)

So as long as the lakage to earth is not on average, the same from both
'live'and 'neutral' they should be OK..

Just because they dont *use* the ground connection you can't assume
that.

a) There may be differential capacitive effects.

b) They will certainly not have been type tested under those
conditions.

DG