3 wire lighting systems the 3 wire system is less common than the 2 wire system it includes a neutral at the switch as well as the live and switched live wires. Connect the wire marked common to the black or dark colored screw.
3 Way Switch Variations
Light switch 3 wires. Its likely youll also need to replace the. Connect the ground wire to the green screw. The switch may also have several ways to make the wire connections. Connect the two remaining traveler wires to the two brass or light colored screws. The 2 wire source feeds to an adjacent switch for a differ. Three way switches have different methods of connection depending on the brand of the switch.
Im moving a light switch to a different wall and have found that the cable from the switch to the light has 3 wires but i dont know why. When wiring a 3 way switch first screw the terminal screws of the new switch until they are difficult to turn. Its likely youll also need to replace the. Turn off the correct circuit at your electrical panel. Either way complete these five steps for 3 way light switch wiring. Three way switch wire connections.
Add an electrical box for the second 3 way switch in the basement. If you have a 2 gang or 3 gang switch you may have black and grey wires however these will have a brown sleeve on them as they are also switched live wires. Two wires attach to brass screw terminals which are usually at the top of the switch and an additional wire attaches to a dark colored not green screw terminal which is usually at the bottom of the switch. All switches have screws on the side but some also come with push fitting holes or slots to slide the wire into. A three way switch has at least three wires and possibly four depending on whether it has a ground wire.
Gallery of Light Switch 3 Wires
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