I thought the the incoming supply to most US households was 220 volts, centre tapped to ground to give 2 x 110v or 1 x 220v to power heavy stuff like cookers etc. Might be rules about using the latter for utilities of course.
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone