How many volts does a 3Ø, 4-W supply system delivering 120/240 volts provide to the neutral?

In a 3-phase, 4-wire (3Ø, 4-W) supply system delivering 120/240 volts, the voltage to the neutral can be understood by analyzing the configuration of the system.

In this type of system, one phase provides 120 volts to the neutral, while the other two phases provide 240 volts when measured between them. This is a common setup in residential and commercial electrical systems, where 120 volts is used for standard lighting and receptacle circuits, and the 240 volts is utilized for larger equipment and appliances.

The neutral wire serves as a return path for current in a single-phase circuit. When referencing the neutral in a 3Ø, 4-W system, the voltage from any of the three phases to the neutral is 120 volts. Thus, the voltage measured at the neutral in this system is indeed 120 volts.

Therefore, the answer indicating that the voltage to the neutral is 120 volts correctly reflects this aspect of the 3-phase system, reinforcing how these systems are designed to provide both 120 volts and 240 volts for various applications.