Electrical diagrams are drawings that use lines, symbols, and number combinations to represent electrical circuits. Electrical diagrams show the wiring between components as well as their relative positions. A circuit diagram, also called an electrical, elementary, or electronic schematic is a simplified graphical representation of an electrical circuit. Circuit diagrams are used to design, build, and maintain electrical and electronic equipment. A wiring diagram's main purpose is to show all of the components in an electrical circuit and how they are arranged to show their actual physical location.