What happens to a normally closed contact when its coil is energized?

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Prepare for the NCCER Electrical Level 2 Control Systems and Fundamental Concepts exam. Utilize flashcards and multiple choice questions with hints and explanations. Ensure success on your exam!

Multiple Choice

What happens to a normally closed contact when its coil is energized?

Explanation:
When the coil is energized, the magnetic field pulls the armature and moves the contact away from its seated position, causing the normally closed contact to open the circuit. This is why NC contacts conduct when de-energized and interrupt the circuit when energized. The coil’s action doesn’t create a short; it just changes the contact state. (A normally open contact would behave oppositely, closing when energized.)

When the coil is energized, the magnetic field pulls the armature and moves the contact away from its seated position, causing the normally closed contact to open the circuit. This is why NC contacts conduct when de-energized and interrupt the circuit when energized. The coil’s action doesn’t create a short; it just changes the contact state. (A normally open contact would behave oppositely, closing when energized.)

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