In switch terminology, NC stands for:

In switch terminology, NC stands for:

• A. Normally Closed
• B. Not Connected
• C. Negative Control
• D. Neutral Circuit

Answer: (A)

Normally closed describes a switch contact that is conducting in its resting, unactuated state. In this condition, the two contacts touch and current can flow. When you actuate the switch, the contacts separate and the circuit opens, stopping the current. This default-on behavior is what the term conveys, and it’s why this is the correct designation. The other terms aren’t used to describe switch contacts: not connected means there’s no path at all, while negative control and neutral circuit aren’t standard labels for a contact’s normal state.

Normally closed describes a switch contact that is conducting in its resting, unactuated state. In this condition, the two contacts touch and current can flow. When you actuate the switch, the contacts separate and the circuit opens, stopping the current. This default-on behavior is what the term conveys, and it’s why this is the correct designation. The other terms aren’t used to describe switch contacts: not connected means there’s no path at all, while negative control and neutral circuit aren’t standard labels for a contact’s normal state.