Ramya had a doubt after learning the Sub-topic “Electrical Wiring”. The doubt
is “What will happen if we use the same copper wire which we are using for live,
neutral and earth wires as fuse wire even?” Suggest her by giving proper characteristics
of both the wires.
Pls Give The Right Answer For The Brainliest.
Answers
Answer:
Our electricity supply in our homes have three wires. They are called Live, Neutral and Earth. The colour of the Live wire is brown, the colour of the Neutral wire is blue and the colour of the Earth wire green with yellow stripes. The Live wire is connected directly to the generators of the power station, never touch this wire because it carries 240 V and and can kill you.
The Neutral wire returns the electricity to the generators of the power station after it has passed through an electrical device to complete the circuit. The Neutral wire is zero volts, but you must never touch this wire.
The Earth wire usually carries no electricity, it is there to prevent people from getting electrocuted when there is an electric current leakage. This happens when the insulation of the Live wire gets faulty and electric current flows through the metallic housing of an electric device. If there is no Earth wire and a person touches this device he gets an electric shock. If the Earth wire is connected to the housing of the device, the electric current passes from this wire instead of passing from the individual because an electric wire is a better conductor than a person. So if the person touches this housing, he gets a smaller electric shock which is not dangerous to his life.
Three Pin Plug
The function of the fuse is meant to break an electric circuit when current supplied is larger than necessary by the device. In the fuse there is a wire which melts when the current rated on the fuse is exceeded. By that method one can ensure that if there is a short circuit or an electric current leakage in the circuit, the circuit is disconnected from the electrical supply. Ideally when you fit a plug to a new device or appliance, determine the maximum current required by the device and find a fuse slightly larger than the current required. If you insert a fuse with the same or smaller than the current required, the fuse melts immediately. When the fuse melts, it has to be replaced by another suitably rated fuse.
There is another electrical device which functions like a fuse, this is the miniature circuit breaker (MCB). When current is exceeded, the MCB has to be reset only.