Basic Electrical Diagram Info

By | May 24, 2021



Understanding the Basics of an Electrical Diagram



Having a basic understanding of how electrical diagrams can be incredibly important when it comes to staying on top of any necessary maintenance, repairs, and upgrades in your home. Many people confuse electrical diagrams with wiring diagrams, but they are two completely different things. An electrical diagram provides an overall view of how all of the individual electrical components are connected and interact with each other, while a wiring diagram provides the specific details about the wiring used for certain projects.



If you are not familiar with electrical diagrams, you may feel intimidated by them. However, once you learn the basics and the terminology used, it's easy to understand the diagrams. This article will provide an overview of the most common symbols, components, and elements you may see in an electrical diagram.



Basic Electrical Symbols



Before diving into the components and elements of electrical diagrams, it is important to know the basic symbols used in them. Electrical diagrams use a variety of symbols and icons to represent elements in the diagram. Some of the most common symbols include:




  • Lines: Lines are used to connect components and allow electricity to flow between them.

  • Switches: Switches are represented by rectangles and control the electricity flow by opening and closing a circuit.

  • Circuits: A circuit is a continuous path that electricity can flow through and is represented by a looped line.

  • Voltage Sources: Voltage sources are represented by triangles and provide the energy needed for the circuit to function.

  • Lights: Lights are represented by circles and indicate when power is flowing through the circuit.



Common Electrical Components



Now that you know the basic electrical symbols, it’s time to move on to components. As mentioned earlier, electrical diagrams provide an overview of how all of the components are connected. Here are some of the most common components found in electrical diagrams:




  • Capacitors: Capacitors are two-terminal electrical components that store electrical charge, and are used to regulate the flow of current in circuits.

  • Resistors: Resistors restrict the flow of current in circuits, and are typically represented by a zigzag line.

  • Diodes: Diodes allow electricity to flow in one direction, and are typically represented by a triangle with a line on one side.

  • Transistors: Transistors are three-terminal electrical components that are used to regulate current flow in circuits. They are typically represented by a rectangular shape.

  • Relays: Relays are electrical switches that open or close circuits remotely or automatically, and are typically represented by either a box or a circle.



Elements of an Electrical Diagram



Now that you know the symbols and components of electrical diagrams, it’s time to discuss the elements. An electrical diagram consists of three elements:




  1. Wiring: Wiring is typically represented by dashed lines and connects all of the components together within the diagram.

  2. Grounds: Grounds are points within the diagram that are connected to ground and serve as a reference point for voltage. They are typically represented by small circles with a line connecting them.

  3. Power Sources: Power sources provide the power needed for the circuit to function, and are typically represented by squares with a single line connected to them.


  4. Simple Switched Supply Circuit Diagram

    Simple Switched Supply Circuit Diagram


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