I am building a new control and power distribution system because after this first year and what I have planned for next year I need to upgrade. I need about 50 Amps of 120v to power the power supplies. All the power supplies are 120/220 VAC input. Has anyone used 220 volt to power the power supplies? That would make it easier that running 3 - 120V 20A circuits. I assume that you wire it like 120v (L1 and Neutral with both hots from 220v) but change the switch to 220v. Thanks for your help.