Which voltage is used for the phase-to-neutral in a typical 3-phase 4-wire system?

In a typical 3-phase 4-wire system, the phase-to-neutral voltage is defined as the voltage measured between one phase conductor and the neutral conductor. This measurement reflects the voltage available for single-phase loads connected to one of the phases.

The phase voltage is specifically the voltage measured across a single phase and the neutral point, making it the correct answer in this context. In a balanced system, each of the three phases (often labeled as A, B, and C) will have the same phase-to-neutral voltage.

To clarify further, the line voltage refers to the voltage between two phase conductors and is typically higher than the phase voltage. The neutral voltage does not exist in a conventional sense in a properly functioning system where the neutral is grounded; rather, it serves as a return path. Single-phase voltage is a broader term that can refer to the voltage of any single-phase system, not specifically tied to the phase-to-neutral concept in a 3-phase system. Thus, the definition of phase voltage aligns perfectly with the question regarding voltage utilized in a 3-phase 4-wire setup.