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What Is 3 Core And Earth Cable Used For?
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Author: Site Editor
Publish Time: 2015-03-09
Origin: Site
A 3 core & earth cable is often used in applications such as 2-way lighting for residential use, as well as other applications, such as wiring to central heating systems and devices. Depending on how electricians design the circuit for the 2-way lighting, and the position of the switches, the 3 core & earth cable might have neutral or live application.

Usually, a 3 core cable means that an electrical wire with three separate copper conductors, each within its own protective jacket, sheathed in an external jacket or protective sheathe. However, when it comes to 3 core & earth cable, there is a fourth conductor inserted during the manufacturing process.
As an example, a typical 3 core flex cable will have the usual 3-cores comprising of live, neutral and earth, but there will be another conductor – a fourth. This additional core is usually bare copper for earthing purposes. In our above example, if we used a 3 core flex cable with the additional bare copper conductor, that fourth conductor must be inserted through a Green/Yellow coded sleeve (earth) during installation.