What type of devices does Article 280 specifically regulate?

Article 280 of the National Electrical Code (NEC) specifically regulates surge arresters, which are devices designed to protect electrical equipment from voltage spikes. These voltage spikes can occur due to various events such as lightning strikes, switching surges, or other transient voltage conditions. Surge arresters work by diverting excess voltage away from electrical circuits, thereby preventing damage to connected devices.

The provisions in Article 280 outline the installations, requirements, and safety considerations necessary to effectively use surge arresters. This includes proper placement, grounding, and maintenance to ensure they perform effectively in protecting equipment.

Surge-protective devices, circuit protection devices, and wiring devices are governed by other articles in the NEC, which focus on their respective functions, requirements, and safety standards. Understanding the specific regulation of surge arresters in Article 280 emphasizes the importance of protecting electrical systems from transient voltage surges.