The most commonly used electrical blueprint symbols including plug outlets switches lights and other special symbols such as door bells and smoke detectors are shown in the figure below. Make sure you understand the symbols on your diagram before beginning your project.

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Residential electrical wiring diagram symbols. Explanations for common household electrical items such as. This electrical wiring project is a two story home with a split electrical service which gives the owner the ability to install a private electrical utility meter and charge a renter for their electrical usage. There are several other electrical wiring symbols used in residential and commercial wiring but the above list of symbols are the important ones. Here is a standard wiring symbol legend showing a detailed documentation of common symbols that are used in wiring diagrams home wiring plans and electrical wiring blueprints. It shows how the electrical wires are interconnected and can also show where fixtures and components may be connected to the system. The electrical symbols will not only show where something is to be installed but what type of device is being installed.
Wiring diagrams use simplified symbols to represent switches lights outlets etc. When looking at any switch diagram start by familiarizing yourself with the symbols that are being used. Home wiring diagrams from an actual set of plans. A wiring diagram is a simple visual representation of the physical connections and physical layout of an electrical system or circuit. These electrical and electronic circuit symbols are generally used for drawing schematic diagram. For other residential symbols see our blueprint symbols page.