I saw one of your posts with diagrams and I figured that is exactly what I need. I have a GFCI outlet and light switch in the same box. There are 2 sets of wires coming from the wall(Blk, wht, grnd). The first set is live and feeds the outlet (LINE) The 2nd set comes from the lamp on the wall and into the box where the light switch will go. How do I do the wiring so the light switch will have power??
Electrical – How to wire a receptacle and a light switch
electricalwiring
Related Solutions
Depending on the device, it should go something like this.
Wiring the device in this way, should allow the switch to control the receptacle. The switch will also control anything connected to the Load terminals, and the Load terminals will be GFCI protected.
NOTE: For outdoor installations, don't forget the in-use weatherproof cover.
Since your light is on a different circuit than the outlet, you'll need to run a switch loop from the light to the 2-gang box using 14/3 (yes 3) cable, with black as the hot, red as the switched hot, white as a spare neutral, and the bare or green wire as well, the ground (aka EGC) :)
In the light box, you'll take the black that currently goes to the fixture hot and connect it to the black of the switch loop instead; the fixture hot then gets wired to the red wire of the switch loop. The switch loop white and green wires get wired into the existing white and green wires coming into the box.
After transposing the existing GFCI from the old 1 gang box into the new 2 gang box, you'll want to leave it alone from here on out. To wire up the switch, you connect the brass screws to the black and red wires, the green screw to the EGC, and simply wirenut off (i.e. put a wirenut on the exposed end of) the neutral on the switch loop -- it's there for future use by say a motion sensor or lit switch as per 404.2(C) (neutrals are called 'grounded conductors' in the NEC, btw, if you're a Code newbie and scratching your head at this :):
C) Switches Controlling Lighting Loads. The grounded circuit conductor for the controlled lighting circuit shall be provided at the location where switches control lighting loads that are supplied by a grounded general- purpose branch circuit for other than the following:
(4) Where a switch does not serve a habitable room or bathroom
Best Answer
Use a wire nut to connect together:
Use a wire nut to connect together:
Connect the other terminal on the switch to the black wire coming from the lamp on the wall.
Lastly, use a wire nut to connect together:
Bad diagram follows: