The __________ lead of the transformer is normally fused and extended in the ladder diagram of the control circuit as the left-side vertical bus.
The __________ lead is normally grounded with direct connection to the equipment-grounding grid of the electrical-power distribution system (metal enclosure of the motor-control center) and extended in the ladder diagram as the right-side vertical bus.
A) X1; X2
B) X2; X1
C) X2; X2
D) X1; X1
Share your understanding of this question with the correct explanation.