What is the role of each of the three pins in a power plug
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the upper pin is meant for earthing
the lower pins are meant for positive and negative power supply
the lower pins are meant for positive and negative power supply
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A 3 pin plug consists of three pins (hence the name). Each pin must be correctly connected to the three wires in the electrical cable. Each wire has its own specified colour so as it can be easily identified.
The LIVE wire is BROWN.
This is connected to a fuse on the live pin. The electric current uses the live wire as its route in.
The NEUTRAL wire is BLUE.
This is the route the electric current takes when it exits an appliance; it is for this reason the neutral wire has a voltage close to zero.
The EARTH wire is GREEN & YELLOW
and connected to the earth pin. This is used when the appliance has a metal casing to take any current away if the live wire comes in contact with the casing
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