What type of devices does Article 280 specifically regulate?

Article 280 of the National Electrical Code specifically regulates surge arresters. These devices are essential for protecting electrical equipment by diverting excess voltage caused by surges, such as those from lightning strikes or switching surges. Surge arresters operate by providing a low-resistance path to ground when voltage spikes occur, thus safeguarding connected equipment from damage.

The focus on surge arresters in Article 280 includes their installation and the requirements for their connection to grounding systems to ensure that they function effectively. This attention to detail helps create a safer environment for electrical systems and reduces the risk of costly damage or failure.

While surge-protective devices and circuit protection devices may be subject to related regulations, they fall under different articles in the NEC. Surge-protective devices, for example, can be covered under Article 282, which details their installation and function, and circuit protection devices may be discussed in other sections pertaining to circuit breakers and fuses. Wiring devices are also addressed in separate articles that cater to the rules governing general wiring practices. Thus, the specific regulation of surge arresters in Article 280 makes them the focus when discussing this part of the NEC.