Answer / s,jude finney

amount of copper used for conduction is less in 3phase for
the same amount of power in single phase

Answer / phanendra babu

there are so many reasons
1.generation is 3ph. so convertion is difficult
2.losses will be more in single phase system
3.equipment cost will be increased
4.copper cost increased for example for 3ph sys 3wires are
enough to transmit but for 3 single phases 6 wires are req.

Answer / gunasekaran

power regulation is good for 3phase system.

Answer / guest

The power generation in india is 11kV 3phase,50Hz & vch is
economical (as per standard)
After genration v have different voltage levels for
consumers(Transmission to Distribution).
in distribution the voltage is steepped down to 440v
because different loads r there for domestic and industrial
needs.
so v can take tappings for any phase for consumers..

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