A switch loop single pole switches light dimmer and a few choices for wiring a outlet switch combo device. Wiring a switch with an outlet.
Light Switch Wikipedia
Wiring a switch to a light and an outlet. The hot source wire is removed from the receptacle and spliced to the red wire running to the switch. Wiring an outlet to a switch loop. If you put the loop over the screw in the counterclockwise direction tightening the screw will force the loop open and could create a loose connection. Wrapping the wire clockwise when wiring a light switch ensures that the loop on the end of the wire will tend to close when the screw is tightened. Is it possible to wire a switch for a light and at the same time connect an outlet to the switch that will not power off and on with the switch. The procedure is not unlike wiring multiple lights to a single switch.
Also included are wiring arrangements for multiple light fixtures controlled by one switch two switches on one box and a split receptacle controlled by two. Mike a handyman from fort dodge iowa. This wiring diagram illustrates adding wiring for a light switch to control an existing wall outlet. The source is at the outlet and a switch loop is added to a new switch. Fishing in a wire from the receptacle to the light fixture is fairly easy so this is how you would wire the switchreceptacle combo device in this situation. You can even wire the switch to control the outlet which is a great option if you prefer a plug in light fixture to a permanent one.
Conversely you can connect the switch for a new light fixture to a nearby outlet which is a procedure similar to wiring outlets in series. This electrical wiring question came from. You can change this duplex receptacle to a switchreceptacle combination so that you still have power in the outlet but can use the switch to control your new overhead task light. This page contains wiring diagrams for household light switches and includes.