give this ans what this daigram show
Answers
it is the domestic circuit diagram
Domestic Electric circuits
We receive power in our house through a main supply, commonly called mains.
It is supplied through overhead cables or underground cables.
There are 3 types of wires in domestic circuits : Earth Wire, Live Wire, Neutral Wire.
Earth wire: It is generally green in color. It is usually connected to a metal plate placed in the earth near the house as a safety measure to ground gadgets that have a metallic body. (refrigerator, toaster). In case of charges leaking on to the metallic body, the charges gets grounded and thus prevent shocks.
Live wire: Positive wire generally red in color
Neutral wire: Negative wire generally black in color
The potential difference (or voltage) supplied in our country is 220V
When they come into our houses, they pass through a circuit called a Fuse. Whenever there is a high voltage, voltage fluctuation, overloading, short circuit the fuse melts and prevents the high voltage reaching the electric appliance. This saves the electrical gadget.
Then through the metre board in the house, these wires pass on to different electric gadgets
Generally 2 types of electric circuits are used at homes
15A : Appliances which have higher power ratings. (geysers, refrigerators, ACs)
5A: Appliances which have lower power ratings TV bulb fans
the live wire carries current and both the neutral and earth wire donot contain current
it means if some one touches the neutral wire he will not get a shock
fuse is used becoz if more amount of current flow on the circuit the appliances will get damaged so it breaks it self so that the circuit will break and appliances will be safe