Which type of distribution system has high efficiency and is economical for the same amount of power?
A. Two-wire AC system
B. Four-wire three-phase system
C. Two-phase AC system
D. Three-wire three-phase system
Answer:D
Which type of distribution system has high efficiency and is economical for the same amount of power?
A. Two-wire AC system B. Four-wire three-phase system C. Two-phase AC system D. Three-wire three-phase system