| 110-120 Volts - Single phase | Consists of one hot wire and one neutral wire. The voltage between the two is 120 Volts |
| 220-240 Volts - Single phase | Consists of two hot wires. The voltage between the two is 240 volts. |
| 110-120/220-240 Volts - Single phase | Consists of two hot wires and one neutral wire. The voltage between either hot wire and the neutral wire it 120 volts and the voltage between the two hot wires is 240 volts. |
| 110-120/208 Volts - Three phase | Consists of three hot wires and one neutral wire. The voltage between any of the hot wires and the neutral wire is 120 volts. The voltage between any two hot wires is 208 volts single phase. The voltage created by combining all three hot wires is 208 volts in three phase |
| 220-240 Volts - Three phase | Consists of three hot wires. The voltage created by combining any two hot wires is 240 volts. |
| 440-480 Volts - Three phase | Consists of three hot wires. The voltage created by combining any two hot wires is 480 volts. |