27+ Brown Blue Black Wiring. The brown and black wires go to the other plug/socket screws, it's live in/live out. Brown, orange and yellow are used for 480 vac.

Black is typically used for carrying hot wires, while red is used for switch legs and travelers. Wire color codes are black, red, white, bare copper, green, white or gray, and blue or yellow. They can also serve as links between electrical loads and switches.
Take Extra Care When Working With Them And When In.
They are essential for creating balanced electrical circuits and ensuring. In that case, a white stripe will set a black wire apart as the negative line. Black wires are commonly used for hot or live.
In Typical Residential And Commercial Power Wiring, Different Colors Are Used To Indicate The Purpose Of Each Wire:
It delivers power to the appliance and connects to the building’s black wire. Some dc applications have two black wires. Standard wire & cable co.
Design, Engineer, And Manufacture Commercial, Military, And Industrial Electronic And Electrical Wire And Cable.
The brown and black wires go to the other plug/socket screws, it's live in/live out. The positive wire is plain black. They can also serve as links between electrical loads and switches.
Blue Wires Are Often Used To Denote The Presence Of A Neutral Wire, Particularly In European Wiring Color Codes.
Black wires carry power to switches and outlets. Brown, orange and yellow are used for 480 vac. You have to connect the blue wire to the (also internally connected) neutral screw.
Wire Color Codes Are Black, Red, White, Bare Copper, Green, White Or Gray, And Blue Or Yellow.
Conductors larger than #6 awg are only available in black and are color taped at. Black is typically used for carrying hot wires, while red is used for switch legs and travelers. Below is an image and table that shows the colour codes for electrical wiring and systems that are used in the uk and the majority of europe.