An electric plug is a form of physical interface device that allows connectivity between an appliance and a power source. An electrical plug, also known as a male plug, typically has a matching female plug or electrical outlet. In the U.S., 110-volt AC electrical plugs commonly contain three terminal screws that allow three wires to connect to a copper conductor: a black or live wire, a white or neutral wire and a green or bare wire as grounding wire.
Cut the end of the power cord flush, and cut away 1 inch from the sheathing of the power cord to expose the inner wires with diagonal pliers. Unscrew the cover of a round (clamp type) rubber plug, using a screwdriver, to expose the terminal screws. Loosen each terminal screw by turning each counterclockwise with a screwdriver.
Strip off 1/2 inch from the tip of each exposed inner wire, using a wire stripper. Slip the wires through the opening on top of the plug; pull the wires out from the bottom of the plug.
Hook the black wire clockwise around the brass terminal screw; tighten the screw with a screwdriver. Hook the white wire clockwise around the silver terminal screw; tighten the screw with a screwdriver. Hook the green or bare wire clockwise around the green terminal screw; tighten the screw with a screwdriver.
Pull on each wire lightly to make sure that it is secure. Trim any excess wire with diagonal pliers, but do not allow any wires to come in contact with each other. Replace the cover of the plug onto the plug housing. Find the clamp located at the handle of the plug and tighten its holding screws. Plug the appliance to a 110-volt electrical receptacle; turn the appliance on to test the connection.