How to install a electrical plug? It's easy to install but something should pay attention to. 

1. Turn off power to outlet. Usually must be done at fuse or breaker box. 

2. Prepare flashlight, screwdriver and needle nose pliers. Remove old plug. Do not drop screws into box. Put on paper plate so you don't lose them. 

3. Reinstall new plug. Black (hot) to black screw, white (neutral) to other and green to green if you have an earth ground. You may or may not. Black screw should be marked. Neutral normally not marked.

4. Twist 3/4 round loop in power wires and hook to screws and then tighten screws to plug.

5. Reinstall plug using the screws that you saved on your plate.

6. Reinstall outlet cover.

7. Turn power back on and make sure fuse does not blow or breaker does not trip. If breaker trips, you shorted to the metal box somewhere in the outlet. Turn power back off and find the problem. Power wires cannot touch sides of box.