Q.For the same conductor length, same amount of power, same losses and same maximum voltage to earth, which system required minimum conductor area?
ASingle-phase ac
B3-phase ac
C2-wire ac
D3-wire dc
Correct Answer : (D)
3-wire dc
Hints :
For the same conductor length, same amount of power, same losses and same maximum voltage to earth, The system required minimum conductor area is 3-wire dc.