The hot source wire is removed from the receptacle and spliced to the red wire running to the switch. For example if you need a new outlet in the kitchen you can save a lot of time by connecting it to the switch for the kitchen lights.

3 Way Switch Wiring Electrical 101
Wiring a new switch and light from an outlet. This wiring diagram illustrates adding wiring for a light switch to control an existing wall outlet. Wiring an outlet to a switch loop. Wiring a new switch and light from an outlet. From the switch new 2 wire cable is run to the new light location. 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. If youre running out of outlets to plug things into installing a switchoutlet combo is a great way to squeeze in another receptacle without completely wiring in a new outlet or sacrificing existing outlets or switches.
The switch comes first in the new part of the circuit and new 2 wire cable is run to it from the outlet. The source is at the outlet and a switch loop is added to a new switch. 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. Wiring a switch with an outlet. Mike a handyman from fort dodge iowa. The procedure is not unlike wiring multiple lights to a single switch.
How to install and set up the belkin wemo light switch. 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. In this diagram power is taken from an existing wall outlet for a new switch and light fixture. 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. This electrical wiring question came from.