A conductor in both three-wire single-phase, and Y-connected three-phase electrical systems in which the voltage is the same between it and any of the other conductors. The neutral conductor in a three-wire single-phase system is normally grounded with 110 volts between either line and the neutral conductor, and 220 volts between the two lines. In a Y-connected, three-phase system, there is normally 120 volts between any of lines and the neutral conductor and 208 volts between any two of the lines.