![electrical - Can someone tell me what/how there are 4 wires on one switch and if they're necessary? - Home Improvement Stack Exchange electrical - Can someone tell me what/how there are 4 wires on one switch and if they're necessary? - Home Improvement Stack Exchange](https://i.stack.imgur.com/H0Ui8.jpg)
electrical - Can someone tell me what/how there are 4 wires on one switch and if they're necessary? - Home Improvement Stack Exchange
![A three-way switch is a handy convenience to control a light from two locations, such as at the top and botto… | Light switch, Three way switch, Light switch wiring A three-way switch is a handy convenience to control a light from two locations, such as at the top and botto… | Light switch, Three way switch, Light switch wiring](https://i.pinimg.com/474x/f4/33/ff/f433ff6308ed2513e3e49f0fbe8792c4--i-messed-up-electrical-outlets.jpg)
A three-way switch is a handy convenience to control a light from two locations, such as at the top and botto… | Light switch, Three way switch, Light switch wiring
![First time wiring light switch. Two red wires. Screws in top right and bottom of switch. Any help appreciated. : r/electricians First time wiring light switch. Two red wires. Screws in top right and bottom of switch. Any help appreciated. : r/electricians](https://preview.redd.it/wdl65qcumsx51.jpg?width=640&crop=smart&auto=webp&s=6755276c295a5b99978b4caeb1023477572e2673)