Dave Plowman (News) wrote:
My mothers house was new in 1953, was 250V, 3 pin plugs and radials.
250 volts. Heh heh.

In 1949, Glasgow, Greenock, Motherwell, Merthyr, Redcar, and no doubt
many other places had 250 Vac (and often Vdc)

Edinburgh had 230 / 460 Vdc and 115 / 230 / 400 Vac

Leeds coulnd't make its mind up between 200, 230, 346 or 400 Vac.
Colchester and Stafford were still on 210 / 420 Vdc.

Very few places wree on 240/415 Vac.

(Practical Electrical Wiring and Contracting, E H Freeman MIEE, London:
Odhams Press)

Owain