In India why we use 220 volt in home? Why not more than that?

Question

In India why we use 220 volt in home? Why not more than that?

Answer 1

You need a standard voltage.  Every country has set a standard most around the world are 230V or 120V.  There are some small variations.  The 110V standard was developed by Thomas Edison as the optimum voltage for the filaments in the light bulb.  As filament materials evolved a German electric company increased the voltage to 230V to improve distribution efficiency.  As electrical systems developed equipment was made for these standards.

Answer 2

I think, But I could be wrong

its one of 2 standards, it is  besed in the power delivery system

You dont have as many amps if the volts are high, they transmit better over long ranges.

Answer 3

220/240V is the normal voltage rating for most parts of the world. The U.S. uses 110/120V. No part of the world use anything above 240V for domestic purposes.

Hope this answers your question!

Answer 4

its a convention..for eg. in india why only 50 hz??

Answer 5

In the US we only use 110. It has to do with the distribution of power thru the power lines I think.

Answer 6

220 volts has been used as standard for your country and other European countries. Above it appliances may burn out because these are also designed for 220Volts only. Residential voltages should not be more than 220 volts to avoid eletrocution. The US and Japan even uses only up to 110 volts for safety purposes.

Answer 7

coz thats enough

Answer 8

you shouldnt need more than that, its watts that determine the amount of power your house gets, and im usa we only get 120 volts per home

Answer 9

I'm not aware of any country that uses more than 220 volts in homes.  Anything more than that would cause non-function of your appliances and would also be a waste of power.

Answer 10

It is to try and limit the damage that could be caused in the cases of accidents.

It can still kill you, but it's not as likely to kill you at the lower voltages. If you use your body to short a 480V -> earth you will most likely die due to the large current passing through you.

The current that flows through a circuit (you) is dependant on the voltage and the resistance. People are not the resistive, so a increase in voltage = an increase in current.

It is the current that kills people, not the volts. This is why 50000 volt stun guns don't (usually) kill people. They can not provide any sustained current. 110V still can kill you because it can sustain currents (even in the milli-amp range).

Also high currents (from high voltages) can lead to electrical fires.

However, higher voltage allows transmission of power over distances at greater efficiency. transmission losses can be as high as %30-%40 of the power generated. 220V is a sensible balance of safety and efficiency.

N.B. power lines usually carry between 11KV to 330KV, which is then stepped down by a transformer and distributed in a local area at the 220V level.

If the USA were to change to 220V they would save in the transmission between transformer and end users.