Red Seal Electrician Practice
Motor controlsQuestion 87 of 1506

A motor is replaced with one of a different power rating. What must be checked on the starter?

  1. The coil must be rewound
  2. The contactor terminals must be relabelled
  3. The overload heaters must suit the new motor
  4. The power contacts must be made normally closed
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Correct answer: The overload heaters must suit the new motor

Each heater has a thermal response matched to the motor rating. The motor maker names the right one.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 5.2: Contactors

Practice motor controls

Questions last reviewed: 18 October 2026