On 07/07/2013 15:30, Harry Bloomfield wrote:
....
The basic numbers in the UK are 415v 3Ph. 240v single phase = 240v from
any of the three phases, to neutral. 415v as measured from any phase aay
of the other two....

Since 2003, it has been 400v and 230v, but with wider tolerances, so
that neither we nor any other EU country had to make any change to
existing equipment.

Colin Bignell