On Sun, 1 Nov 2009 19:40:24 -0000 someone who may be "Nick"
wrote this:-

Is the transformer always on whilst it has power or does it only come live
(make heat) when an appliance is attached ?

The transformer of every one I have encountered is switched, but I
have not examined all of them. Even when energised the heat is not
great.

However, to comply with the wiring regulations electrical equipment
must be enclosed in a non-flamable box. Put one into the wall flush
with the surface and flush mount the socket on that. If you use a
metal one make a support out of wood to fasten it to. If you can
find a plastic one for hollow walls which is deep enough you may
want to use that instead.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000...#pt3-pb3-l1g54