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A dedicated circuit has only one device, usually a receptacle and supplies power to one load only. This type of circuit is normally used for high wattage appliances.
In the diagram below, a 3-
Diagrams shown on this page are simplified for clarity. Electrical outlet boxes can have numerous NM cables going in and out. See Actual Switch Box Wiring Diagram.
Receptacle ground connection diagram is shown separately.
Dedicated Circuit Wiring Diagram