On Sun, 14 Aug 2005 12:16:56 +0100, Derek ^
wrote:

I'm sure a SMEG oven I bought had the possibility of being connected
to a 3 phase supply by a cunning re-arrangement of links.

Some friends recently bought an oven / gas hob (an impressive beast -
not Smeg, but a similar up-market brand) with such an arrangement. It
was supplied with two controller modules (presumably potted triacs) that
were fitted as alternatives for single or three phase.