Which of the following is NOT a valid
system for the distribution of AC power?
Single-phase two-wire-system
Two-phase three-wire system
Single-phase three-wire system
Two-phase two-wire system
Two-phase two-wire system
In distribution AC system 2 phase
2-wire system is not used. AC 3 phase 4 wire 1-phase 2 wire two phase three
wire, 1 phase three wire used in distribution system.
Hence, the correct option is (D).
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