Single Phase power is a two wire Alternating Current (AC) power circuit.
Most people use it every day because it’s the most common household power circuit and powers their lights, televisions and some appliances.
Typically there is one power wire and one neutral wire, and power flows between the power wire (through the load) and the neutral wire.
Three Phase power is a three wire Alternating Current (AC) power circuit. Compared to single phase, a 3 phase power arrangement provides more power with the same current and provides more power circuits.
Most US commercial buildings use a 3 Phase power arrangement because of its power density and flexibility.
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