Any opinions on running 3 phase motors rated at 220/230/240 volts on 208 volts? I have seen this done before without any problems, but I am looking for opinions on the extra current draw and possibility of overheating by running at the lower voltage. My main reason for asking is that I am trying to spec the proper utility service voltage for a machine shop with the power company. 120/208Y seems the most flexible, but 120/240 Delta is a little better voltage wise. There will be a mix of 3 phase and single phase. 10HP and less on 3 phase machines. 5HP and less on single phase machines. Then there are some single phase and 3 phase welders.
