In electrical terminology, what does NC stand for on a switch symbol?

In electrical terminology, what does NC stand for on a switch symbol?

• A. Normally Open
• B. Normally Closed
• C. Not Connected
• D. No Connection

Answer: (B)

NC on a switch symbol means the contact is closed in the switch’s normal (unactuated) position. In other words, when the switch is at rest, there is a conducting path and current can flow. When you actuate the switch, that movable contact moves away from the fixed contact and the path opens. This is the opposite of normally open, where the circuit is open at rest and closes when actuated. The labels Not Connected or No Connection aren’t used to describe the state of a contact on a switch symbol; they would imply there’s no connection at all rather than indicating the default contact state.

NC on a switch symbol means the contact is closed in the switch’s normal (unactuated) position. In other words, when the switch is at rest, there is a conducting path and current can flow. When you actuate the switch, that movable contact moves away from the fixed contact and the path opens. This is the opposite of normally open, where the circuit is open at rest and closes when actuated. The labels Not Connected or No Connection aren’t used to describe the state of a contact on a switch symbol; they would imply there’s no connection at all rather than indicating the default contact state.