By Brian McDivitt, PE, and Ryan Maroney, PE

Many of the devices and equipment we use in our day-to-day tasks require a power distribution system that makes 120V available for users. This 120V power can be achieved by a single-phase or a three-phase (wye or split-phase delta) configuration, but is one configuration better than another for your building? Ultimately, the configuration used for your building depends on your equipment needs, overall building electrical load, and what is most economical.

Editor’s Note: This is the third in a three-part series on power distribution systems. Read parts one and two here.