In terms of why the wire colour change occurred, very simply put, the changes would ensure that fixed cables in your home will (if any new circuits are introduced) carry the same colour wires as any flexible appliance cables there may also be and also match wire colours used in Europe. New and old cables showing colour change for 2-core and 3-core and earth cable 2 core and earth (or twin and earth as it’s also known) is generally used for wiring radial and ring main circuits whereas 3 core and earth is used mostly in 2-way lighting setups. In electrical wiring there are essentially 2 common types of cable you will encounter 2 core and earth and 3 core and earth. When the change came into effect in 2006 it ensured that in new fixed electrical installations the live wire colour changed to brown from red, the neutral changed to blue from black and the earth remained green/yellow or bare.
Warning: To complete electrical works you must comply with Electrical Regulations – Click here for more information.
In this guide you will learn all you need to know about UK wiring colours, and what the old wire colours were changed to and why. When performing any form of electrical work it is absolutely essential that you know what colour wire in an electrical cable should be used for what purpose so that when you need to wire an object up, you connect the right wire to the right terminal.
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