The AltMill runs on a 48V10A power supply rated for approximately 500 watts of power that goes to each motor from a standard North American 110V outlet.
The Spindle and Dust Shoe kit that is offered as an additional add-on consumes approximately 1500-1600 watts of power at max load from a standard North American 110V outlet.
Please check your breaker ratings and wiring to see if your home or shop is compatible with these loads. We recommend allocating two 15A circuits, one for the spindle and dust collection system, the other for the controller and computer.