What is the primary function of the brass screw in a duplex receptacle?

The primary function of the brass screw in a duplex receptacle is to connect to the hot wire, which is responsible for carrying the electrical current to the appliance or device plugged into the outlet. In standard electrical wiring, duplex receptacles have two screws: a brass screw for the hot wire and a silver screw for the neutral wire. The hot wire, typically colored black or red, delivers power, while the neutral wire provides a return path for the current.

Recognizing the roles of the brass and silver screws is essential for proper installation and safety in electrical systems. The ground connection is facilitated through a different terminal, usually marked with green or connected to the receptacle's metal frame. Understanding the specific functions of each connection helps ensure that outlets are wired correctly, ultimately promoting safety and efficiency in electrical usage.