Answer / jagjeet

If human safety has to be consider than definately 110
voltage system is more safer than that of 220 volts

Answer / sudhisht srivastava

in rich contry having not any problem of mony.

mostly uses 110 volts of supply.

bcose in 110 volts supply power loss is grater as compare
to 220v supply(india)
p= V Square/R

power is inversly propotional to resistance if we consider
voltage.



If human safety has to be consider than definately 110
voltage system is more safer than that of 220 volts.


if energy saving is considered then 220volts is batter then
110 volts(u.s.a)

Answer / yano

110vac has a higher current than the 230vac so if you have a
110VAC you have to use much higher copper lead thickness
unlike 230vac you can use smaller copper lead thicknes

Answer / umar

In countries where Money is much more issue as compared to
human life, 230v electricity is used. that all

Answer / sajid iran khan

Dear...
if we will use 110V rms then we require much current as
compare to 230v so lot of heat losses due to high
current.Asian countries mostly are hot weather,so lot of
heat can be happened so we use 220 and small current.USA and
Uk they use 110 so high current can be adjusted because cold
weather.220V use almost all around the world.and many
devices also prepared according to that voltage.so 220 is
compatible.

Answer / kj

Just 2 points about the above answers.
1 - 110 is sufficient to cause electrocution and therefore
is not safer that 230 volts.
2 - while it is true that 230 volts will require smaller
cables as the current is about half for the same power as
it would be for 110 volts. It is not true that 230 is used
only in third world countries because it is cheaper and
life is not as important.
North America uses mainly 110 for domestic uses. In all of
Europe 220 volts is the normal voltage. Japan is one of the
few Asian nations which use 110. Most of Africa and the
South Pacific use 220 to 240 volts. South America use a
mixture.

Answer / ravi kant saxena

From safety point of view RMS value of 110 V is 192.52 V &
RMS value of 220 Volts will be 381.04 Volts which if double
of the RMS value of 110 V.
ADV. of 110 V over 220 V Operations are easy.
Safe to use compare to 220 V.

Dis Adv. for same Conductor cost is 1.5 times more.
Transmisson losses.

Answer / divya

because England has tested that 230v is enough to India whereas Asia and Africa said them to use 110v supply

Answer / mir jahan

Third world countries like India, Pakistan etc, due to
extreme poverty, they cannot afford power lose. so we use
220 volts/50hz while in Advanced countries, money is not an
issue. Therefore, they use 110 as a safety measure.

As, power out put= (square of current)(voltage)

Decreasing of voltage increases the current and power loss
is square of the factor.

Answer / sayan

Nothing can be specified about the advantages & the
disadvantages of 230 V & the 110 V supplies.
It is the rating of the equipments that decides the voltage
level. In a simlar fashion, we can have control circuits
working at 230V (A.C. / D.C.), 110V (A.C. / D.C.).

why designer use kva rating instead of kw in transformer rating???????????????

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