Because some building or other-structure 3-phase AC electrical-power distribution systems operate with the center leg (Line _________ or Phase _________) referenced or connected directly to earth ground (service grounding-electrode system corner-ground ____________), electrical reversal of a 3-phase AC induction motor is normally limited to the interchange of lines _________ and _________.
A) none of the answers
B) 2; B; delta; 1; 3
C) 2; B; delta; 3; 1
D) 1; A; delta; 1; 3
Share your understanding of this question with the correct explanation.