Which abbreviation identifies a contact that is closed when not energized?

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Multiple Choice

Which abbreviation identifies a contact that is closed when not energized?

Explanation:
In relay terminology, a contact that stays connected when the coil isn’t energized is called normally closed, abbreviated NC. This means the circuit is complete in the resting state, and applying power to the coil opens the contact to interrupt the circuit. The opposite type is normally open, which is open at rest and closes only when energized. So for a contact that is closed without any energizing signal, the correct abbreviation is NC.

In relay terminology, a contact that stays connected when the coil isn’t energized is called normally closed, abbreviated NC. This means the circuit is complete in the resting state, and applying power to the coil opens the contact to interrupt the circuit. The opposite type is normally open, which is open at rest and closes only when energized. So for a contact that is closed without any energizing signal, the correct abbreviation is NC.

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