According to my textbook the three phase power is generated so that the power that is needed to generate electricity by the torque remain constant. Another reason is that the summation of the three signals are zero so only one return wire is needed when the loads are equal. Therefore, the number of wires get decreased from 6 to 4.
I have some questions about the basics of generating and transmitting electricity.
1- I don't see how can we assume that the loads are equal when that depends on the users and the number of appliances that they use.
2- So the electricity is generated and transmitted as three phase, could someone explain to me in one form it enters our home.