If the phase sequence of a three‑phase induction motor is changed so that the opposite direction is produced, what is the most likely outcome?

• A. The motor will stop
• B. The motor will run in the opposite direction
• C. The motor will fault
• D. The motor will run at the same direction

Answer: (B)

The direction of rotation in a three-phase induction motor is set by the order in which the stator windings are energized—the phase sequence determines the direction of the rotating magnetic field. If you reverse two of the supply leads, the phase sequence is reversed, which makes the rotating magnetic field spin the other way. The rotor then develops torque in the opposite direction and the motor runs in the opposite direction. This change does not inherently cause a stop or a fault; it simply reverses the rotation (assuming normal starting conditions).