"Pete C." wrote in message
...
My 3 phase delta 240/120 volt service was installed just 4 years ago, at
my
request. I did not want a wye service (for obvious reasons), and am
transforming to 480V for one machine.

Huh? What "obvious reasons"? 120/208 Wye service has no disadvantages
that I know of. You can get 120v from any of the phases, allowing you to
balance your single phase loads and single pole, two pole or three pole
breakers breakers can occupy any panel position since all phases are
equal to each other and to the neutral.

Well there are disadvantages from the 208 voltage, a lot of motors will not
run at 208 with out overheating them. And my band was blade welder didn't
really like it either, had problems welding the larger blades. The oven
elements also don't seem to get as hot, cloths dryer, etc.....

William...