Which of the following is not a common voltage supplied by a wye-configured system?

In a wye-configured system, the common line-to-neutral voltages in typical applications often include 120 VAC and 480 VAC, depending on regional standards and system design. The 120 VAC is frequently utilized in residential and light commercial applications, while 480 VAC is often seen in industrial settings for powering larger equipment.

The 575 VAC, although less common than the other voltages and associated with certain industrial applications (especially in Canada and some specific international uses), can also be derived from a wye configuration, but it is not as universally recognized as the primary standard voltages.

On the other hand, 240 VAC serves as a common voltage level for single-phase systems, especially in residential setups. In wye configurations, while it can technically exist, it is not as standard or prevalent when compared to the other voltages mentioned in the options. The wye configuration's purpose is to facilitate multiple voltage levels, and 240 VAC is less frequently associated with a three-phase wye setup when considering typical ratings.

Understanding these voltages in the context of wye configuration is essential for identifying the typical applications and common setups in various electrical systems.