In article ,
wrote:
It just seems silly. Surely, the bathroom is one of the places where
you would want an earth.

Electric razors, etc, are always double insulated with no practical
possibility of the metal blades becoming live.

But the principle behind an isolating transformer is that neither 'output'
has any potential referred to earth. So assuming some strange fault on
your razor made either wire short to the blades, you could shave while
holding an earthed tap etc and not be in danger. The only way you can be
in danger from an isolating transformer is by touching both output wires
at once. And the design of the socket and plugs used makes this impossible
too. The only obvious way would be with a badly damaged flex.

--
*Letting a cat out of the bag is easier than putting it back in *

Dave Plowman London SW
To e-mail, change noise into sound.