On Mon, 04 Feb 2008 11:28:48 -0600, F. George McDuffee
wrote:

If you are running 220v 3 phase 50
cycles,
I meant 440 3 phase 50 cycle. If the "normal" single phase
voltage in the UK is 220 then the "normal" threee phase will be
440.

Sorry about the brain fart.

As far as delta v wye connection, its not the motor, its the
supply and these are almost always 5 wires in, 3 phased hot, 1
neutral and one ground. You might run into a "wild leg"
condition where the voltage of a hot wire to neutral is not 110
(or 220) but is correct between the three phased power wires.

While using only one leg of a three phase circuit will cause
screams about "power factor" from the electricians, it is almost
impossible to even measure for a limited use fractional hp motor
on a power feed. A possible exception is if you are downstream
from a RPC or VFD [rotary phase converter / variable frequency
drive]


Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?

Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).