Red Seal Electrician Practice
MotorsQuestion 1030 of 1506

What decides the direction of rotation of a three-phase motor that is connected correctly?

  1. The phase sequence of the supply
  2. The frequency of the supply voltage
  3. The voltage level of the supply
  4. The physical size of the rotor
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Correct answer: The phase sequence of the supply

The field rotates in the same order as the supply phases.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 7.4: Polyphase Motor Design

Practice motors

Questions last reviewed: 18 October 2026