Most cables have 3 seperate wires.
Most electrical appliances are connected to the mains through a three - core cables.
This means they have three wires inside them, each with a core of copper and a coloured plastic coating.
The brown wire is the live wire and in a mains supply alternates between a high +VE and -VE voltage
The blue wire is the neutral wire and is always at OV.
The green and yellow earth wire is for protecting the wiring and for saftey. It carries electricity to the earth.
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