The transmission part of a transmission and distribution system supplies electricity to substations and individual service areas. While the job of the distribution part of a T&D system is to take this electricity and supply it to individual consumers at a voltage they can use; doing this job properly requires the use of a variety of electrical devices and an intricate system of distribution lines.

This interactive online course will teach you about the components that make up a typical distribution system. You will learn how to recognize individual components and gain a basic understanding of the jobs they perform.