NCCER Electrical Level 2 – Control Systems And Fundamental Concepts (Module 26211-23) Practice Test

Which statement is true about normally open contacts?

They are closed when the coil is energized They are closed when the coil is de-energized They are always closed They are open when the coil is de-energized

Correct Answer:

They are open when the coil is de-energized

Explanation:

Normally open contacts have no conductivity when the control coil is not energized; energizing the coil creates a magnetic pull that closes the contact, allowing current to flow. So they are open in the de-energized state. In other words, their resting state is open, and energizing the coil closes the contact to complete the circuit.

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