Post #918671

Almost every American home has 240V coming in, with 2 hot wires with 120V AC exactly 180° out of phase with each other, and a neutral wire that’s supposed to be roughly ground voltage. The standard is to split the 240V into 120V for each circuit at the actual breaker panel, by feeding each normal circuit in the house one hot and one neutral wire. But setting up a particular circuit for 240V service is trivial by using both hot wires.