Grounded Plug Wiring Diagram

Open the replacement plug so you can reach the terminal screws inside.

Grounded plug wiring diagram. When replacing a three prong plug connect the black wire in the cord to the brass terminal screw the white wire to the chrome terminal and the green or bare wire which is the ground wire to the green ground screw in the plug. Don t use this receptacle when no ground wire is available. The long slot on the left is the neutral contact and the short slot is the hot contact. A ul knot secures the cord.

If you re wiring a grounded plug for extension cord ends see how you can tackle this project easily. This is a standard 15 amp 120 volt wall receptacle outlet wiring diagram. On a conventional 120 volt two pronged electrical outlet that accepts grounded plugs two prongs plus the rounded center ground connector prong your circuit will have three wires. Attach each section of exposed copper to the appropriate terminal screw.

The white neutral wire this wire is connected to the silver screw on the electrical receptacle often labeled neutral. If you re wiring a 3 prong plug you need 2 conductor cable with a ground. Three prong plugs have a hot wire a neutral wire and a ground wire. A grounded contact at the bottom center is crescent shaped.

Green wire to the green grounding screw white neutral to the silver screw and black hot to the brass screw. This is a polarized device. You can see our white neutral wire connected to a silver screw on the receptacle in our photo below left. In 110v plug wiring you re dealing with 14 or 12 gauge wire.