A wiring diagram is a graphical depiction of the components and cables that comprise an electrical connection. Wiring diagrams are widely used in circuit design and other electronic device tasks. The layout promotes communication between electrical engineers who design and install electrical circuits. A wiring diagram is very important in vehicle maintenance and house construction projects. This is an example of electrical wiring diagram for routing wires. The conduit layout diagram shows the start and end points of the electrical conduit and shows the approximate path taken by any conduit from one point to another.