Which of the following distribution systems is the most economical ?
A. A.C. 1-phase system
B. A.C. 3-phase 3 wire system
C. A.C. 3-phase 4 wire system
D. Direct current system.
Answer:D
Which of the following distribution systems is the most economical ?
A. A.C. 1-phase system B. A.C. 3-phase 3 wire system C. A.C. 3-phase 4 wire system D. Direct current system.