How to wire a three way switch step 1. When nothing is hooked up there is power in the 2 wire plus ground cable on the upstairs switch.
Wiring A 3 Way Switch
How to wire three switches. Make the cuts in the wall and ceiling for the switches and fixture. When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. Run a 3 wire nm cable between the first and second boxes. Feed a length of 14 3 type nm cable or 12 3 if youre connecting to 12 gauge wire between the two boxes. Repeat on the other end and run it into your second switch box. Connect the wire marked common to the black or dark colored screw.
Cut the cable to length if there is extra once you pull through the second box. You will need three black wire pigtails and five green wire pigtails. Cut five six inch lengths of 14 solid. There is only the single 3 wire plus ground in the downstairs switch box and only two 2 wire plus ground cables at the fixture. How to wire three switches in a gang box. Connect the two remaining traveler wires to the two brass or light colored screws.
Strip 6 9 on one end to expose the three separate wires then run the first half into your first switch box. You will run the three conductor wire from the box you just ran. If you are changing an existing triple switch mark the wire going to the common screw. The 14 3 cable has three insulated conductors. Connect the ground wire to the green screw. Feed power wire thru either one of the boxes.
The common terminal should be marked on the back of the old switch. Remove the baseboards along the path from the power source receptacle to each of the switches. When the circuits power is turned on any of these may be hot depending upon how the switches are toggled. Turn off the power to the circuit at the breaker panel. Running the cable along the foot of the drywall is the easiest way to. Should be your two conductor.
White black and red plus a bare ground wire. Connect the wires to the new 3 way switches with ground screws using one of the two wiring diagrams fig. This wire needs to go to the common screw. With a three way switch three wires connect the pair of switchestwo black traveler wires and a third common wire. How to wire 3 switches to control 1 light. Cut three six inch lengths of 14 solid thhn black.
Run three conductor wire between both boxes. Run power wire into one of the boxes. The two switches appear to be connected by a 3 wire plus ground cable.
Gallery of How To Wire Three Switches
