On my two-gang light switch, why does the second switch only work if the other switch is also turned on? - Quora
How to wire a light switch | Downlights.co.uk
On/Off Switch & LED Rocker Switch Wiring Diagrams | Oznium
trying to replace this light switch but it has black, red, white, and an unused ground wire. do I pigtail the red and black and connect the ground/white as normal? : r/askanelectrician