Red Seal Electrician Practice
Motor controlsQuestion 113 of 1506

Which auxiliary contact is used in the reverse control rung to interlock with the forward contactor?

  1. A normally open contact of the forward contactor
  2. A normally closed contact of the forward contactor
  3. A normally closed contact of the overload in parallel
  4. A normally open contact of the reverse contactor
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Correct answer: A normally closed contact of the forward contactor

When the forward contactor is energized, its NC contact opens and blocks the reverse coil.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 6.3: Permissive and Interlock Circuits

Practice motor controls

Questions last reviewed: 18 October 2026