Electricity is generated at the power station. It is brought to our homes by two thick copper wires or aluminium wires fixed over tall electric poles (or by underground cables).
The electricity from the mains is supplied to the houses using a three-core wiring. They are
o The Live wire
o The neutral wire and
o The earth wire
Live Wire: It is at a high potential of 220 volts. The live wire has red insulation
Neutral wire: It is at the ground potential of zero volt. The neutral wire has black insulation covering.From the electric pole situated in our street, two insulated wires L and N come to our house. In India, the potential difference between the two wire is 220V.
The Earth wire: It is a safety measure and does not affect the supply in any way. The green earth wire is connected to a metal plate deep in the earth.
There are two separate circuits in a house, the lighting circuit with a 5 A fuse and the power circuit with a 15 A fuse.
Start your learning Journey !