How to connect a wire with power when it's a 4-wire there red, blue, white, and black - Quora
Why are Electric Wires Color Coded the Way They Are?
Is this wired up correctly? Neutral blue into black, live brown into live black switch. Red live (x2) connected. No earth required as the light is double insulated. : r/DIYUK
Electrical Wiring Colours - The Old and the New (UK) | EC4U
Input on Leviton wiring - Connected Things - SmartThings Community
How to wire an exterior spotlight with brown, blue, and green/yellow cables to old fashioned wiring that has 3 red, 2 black, and 1 white cables from a switch - Quora