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I sold the 3p I was using to the jail for $500 and they leave it permanently attached (they wondered why their welders never worked quite right). They are out there cheaper than $2500, but that is probably a retail price for a larger one.

A motor winding for 230 and 460 but without a rating for 208 will (likely) be 10% less copper (draws 10.7% more amps based on voltage, single phase). Older motors tended to be more generous, but don't count on it. Why take the chance when you could bump it up. There appears to be some...

The problem is that today, most things are built to the edge of their rated duty cycle and no more. Some call it a throw away society. The amount of copper is the issue. Motors rated for 208 have slightly more copper in the windings because they draw more amps. Heating makes resistance go...

Do you have commercial refrigeration? Most home refrig's run on 120v. If your running a 120v machine on 208 (coming from 2 legs and not one leg to neutral), then it's getting too much voltage.

When you run most transformer based welders on 208 you will stick the rods a lot from low voltage. Some motors do not have the 208 volt rating as well. Refrigerator compressors don't like 208 if they are not rated for it. I do work in jails that are all 208/120Y. I use a three phase...