![Light switches have 3 black wires and 1 grounding wire coming to the box. Two of the black wires are twisted together. Light switches have 3 black wires and 1 grounding wire coming to the box. Two of the black wires are twisted together.](https://ww2.justanswer.com/uploads/alexmela/2010-12-14_220143_pigtail_2.jpg)
Light switches have 3 black wires and 1 grounding wire coming to the box. Two of the black wires are twisted together.
![wiring - Why does single pole light switch have 3 wire cable when source is at the switch? - Home Improvement Stack Exchange wiring - Why does single pole light switch have 3 wire cable when source is at the switch? - Home Improvement Stack Exchange](https://i.stack.imgur.com/nwiz8.jpg)
wiring - Why does single pole light switch have 3 wire cable when source is at the switch? - Home Improvement Stack Exchange
![Why is my light switch wire like this with the extra red wire, and why are there more white wires in the wall not going to the switch : r/askanelectrician Why is my light switch wire like this with the extra red wire, and why are there more white wires in the wall not going to the switch : r/askanelectrician](https://preview.redd.it/why-is-my-light-switch-wire-like-this-with-the-extra-red-v0-6g7h9cfzwx3b1.jpg?auto=webp&s=f0602d1043d468de74e2fd814c4e0155f589d81d)
Why is my light switch wire like this with the extra red wire, and why are there more white wires in the wall not going to the switch : r/askanelectrician
![electrical - 3 black wires, 2 white wires for wiring up a new switch? - Home Improvement Stack Exchange electrical - 3 black wires, 2 white wires for wiring up a new switch? - Home Improvement Stack Exchange](https://i.stack.imgur.com/0eDTg.jpg)