On Mon, 26 Jul 2004 02:09:49 -0700, "Harold & Susan Vordos" wrote:
"Gary Coffman" wrote in message
.. .
snip-------

If you have 3 ph delta 220, you will be able to supply 220 1 ph for the
kilns by connecting between any two hots, but there won't be any 120
volt to neutral (delta doesn't have a neutral, and the voltage from any
hot to ground won't be 120 volts).

Not true. Phases A and C to neutral yield 120V, phase B to neutral yields
208V. Delta panels *do* (or can) have 120 volts. My shop is wired three
phase delta and has 5 wires, four conductors ( A, B and C phase, plus
neutral) and one ground. One avoids using the B phase for 120V, obviously.

That's not 220 delta, Harold. That's 240 volt center tapped wild leg delta.
The 240 volt winding between A and C is center tapped, like normal
household 1 ph. The center tap is used as a neutral. The winding between
A and B is a plain 240 winding with no center tap. And the B to C phase is
phantom, ie there is no third phase winding.

This setup is used for small office buildings and light commercial
buildings where the main loads are 1 ph 120 volts or 1 ph 240 volts,
but where there are some 240 volt 3 ph motor loads, usually air
conditioning, pumps, or elevators.

Gary