On Tue, 29 Nov 2005 12:01:19 GMT, Tony Bryer
wrote:

In article , Andrew
Gabriel wrote:
Electricity company did a survey of each house to get a list
of appliances.

In Twickenham the conversion was from DC to AC c.1950. I don't think
the voltage changed.

I was once given a beautiful brass timeswitch from a GPO telephone
box. It had been used in East Durham, where the supply was 30 c/s at
about 200 V. I believe the supply came from nearby collieries, which
generated thir own power and fed a few "customers".
--
Frank Erskine