Answer / rajendran m

Single phase:
a)3 wire system
b)up to use minimum ratting electrical equipments
c)Do not use heavy capacity of motors

Three phase

a) 4 & 5 wire system
b) To be use maximum capacity of motors

Answer / prashant verma

THE MAIN DIFFERENCE BETWEEN 3 PHASE AND SINGLE PHASE SYSTEM IS THE AVG POWER IN TWO SYSTEM FOR 3 PHASE SYTEM THE AVG POWER IS NEVER ZERO BUT IN SINGLE PHASE SYSTEM IT BECOMES ZERO ONCE PER CYCLE SO ITS A CURSE FOR HIGH TORQUE MOTORS N ALSO ITS REQUIREMENT IS FOR SELF STARTING OF SUCH MOTORS.

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