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2.2: Types of Electrical Diagrams

  • Page ID
    3301
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    • Contributed by Camosun College
    • Sourced from BCCampus (Download for free at http://open.bccampus.ca/find-open-textbooks)

    There are four basic types of electrical diagrams:

    • schematic
    • wiring
    • block
    • pictorial

    Schematic Diagrams

    The schematic diagram (Figure \(\PageIndex{1}\)), often called a ladder diagram, is intended to be the simplest form of an electrical circuit. This diagram shows the circuit components on horizontal lines without regard to their physical location. It is used for troubleshooting because it is easy to understand the operation of the circuit. The loads are located on the far right of the diagram and the controls for each load are located to the left. To understand the sequence of operation the drawing is read from the upper left corner and then from left to right and from top to bottom.

    schematicDoorbell.png
    Figure \(\PageIndex{1}\): (CC BY-NC-SA; BC Industry Training Authority)
    1. Schematic of a doorbell system
      wiringDiagram.png
      Figure \(\PageIndex{1}\): (CC BY-NC-SA; BC Industry Training Authority)
    2. Wiring diagram
      blockDiagram.png
      Figure \(\PageIndex{1}\): (CC BY-NC-SA; BC Industry Training Authority)
    3. Block diagram
      pictorialDiagramCircuit.png
      Figure \(\PageIndex{1}\): (CC BY-NC-SA; BC Industry Training Authority)
    4. Pictorial diagram

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