In message , Mr Pounder Esquire
writes
Michael Chare wrote:
How would you connect a door bell transformer to the mains?

You don't. You buy a wireless one.

Argh! Yes, we have a wireless door bell which is filed under U for
Useless. The signal will not pass our granite walls. The only way to
use it is to have the bell so close to the door we could hear someone
outside without the poxy bell!
--
Graeme