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A & B
for electric oven, dryer and/or air conditioner
These diagrams show a typical circuit path from the power company through the main electrical panel and to the outlets (light sockets, switches, and receptacles).
120V A&B Phase
From power company
Ground and neutral are connected together
in one location only, at the neutral point either at the power company transformer or in the main electrical panel.
The potential difference between the A phase and B phase is 240 volts.