Three-phase, four-wire systems can provide power to which types of loads?

Three-phase, four-wire systems are versatile and capable of supplying power to various types of electrical loads. This includes both single-phase and three-phase loads. The reason a three-phase system can support a single-phase load is due to the configuration of the wiring and the way in which power is distributed.

In a three-phase, four-wire system, you have three phase conductors and one neutral conductor. This setup allows for the easy supply of single-phase loads by connecting to any one of the phase conductors and the neutral. This configuration is particularly beneficial for residential or small commercial applications where both single-phase and three-phase equipment might be used, maximizing the utility and efficiency of the electrical system.

At the same time, the three-phase loads can be supplied directly from the three phase conductors without relying on the neutral. This system is commonly utilized in industrial settings for motors, heavy machinery, and other equipment that require significant power.

Thus, the capability of three-phase, four-wire systems to serve both single-phase and three-phase loads supports the understanding that they are designed to handle a wide range of electrical demands, making them essential in various applications.