Draw a schematic labelled diagram of a domestic circuit which includes (i) a main fuse, (ii) a power meter, (iii) - Science - Electricity

Question

Draw a schematic labelled diagram of a domestic circuit which
includes (i) a main fuse, (ii) a power meter, (iii) distribution
box, and (iv) a power plug (b) Why is it necessary to connect an
earth wire to electric appliances having metallic covers ?

Sumrah Shakeel · Answer

a)Domestic circuit:

b) The earth wire is a safety device to prevent electrocution(death by electric shock),especially in an electrical device with a metal frame or casing The most dangerous thing that can go wrong with an appliance is that the live wire becomes loose inside and touches the casing If the casing is metal it will become live If you touch the casing, you will get an electric shock The earth wire is connected to the inside of the casing Then, if the live wire touches the casing, charge will flow through the earth wire (rather than you), and the fuse will blow

Draw a schematic labelled diagram of a domestic circuit which includes (i) a main fuse, (ii) a power meter, (iii) distribution box, and (iv) a power plug. (b) Why is it necessary to connect an earth wire to electric appliances having metallic covers ?