Not quite. It's actually two legs of 120V 180degrees out of phase that gives most homes 220 (240) volts. So you actually DO have two phases into your home going to 2 rails in your electrical box. you then split off all the 110V outlets equally between the two rails and wire 220V using both rails.A reasonable question, but 480 volts is going to be three phase and your home is supplied with single phase electricity. Three phase is used for things like industrial motors and other commercial applications because it is more efficient. The wiring coming into your home is 240 volt, single phase, two pole. Three phase would NOT be the same as three pole.
Keep in mind, I am neither an electrical engineer nor and electrician, so we have now exceeded my knowledge of electric power.