What does the NEC describe as any electric that energizes signaling equipment?

The National Electrical Code (NEC) defines a signaling circuit as any electrical circuit that is used to energize signaling equipment. This includes systems that convey information, such as alarms, notifications, or controls that indicate a particular condition or event. Signaling circuits are specifically tailored for the transmission of signals rather than for power distribution or lighting, which distinguishes them from the other types of circuits listed.

These circuits are designed to operate at lower voltages and are often critical in applications where safety and communication are paramount. Understanding the distinction between signaling circuits and other types of circuits, such as control circuits that manage the operation of devices, power circuits that distribute electrical power, and lighting circuits designed to provide illumination, is essential for compliance with code requirements and ensuring safe installations.