Which article addresses Surge-Protective Devices (SPDs)?

Surge-Protective Devices (SPDs) are specifically addressed in Article 280 of the National Electrical Code (NEC). This article outlines the requirements and guidelines for the installation and use of SPDs in electrical systems to protect against voltage surges. These devices are crucial for safeguarding electrical equipment from damage caused by transient overvoltages, such as those created by lightning strikes or switching operations in power systems.

Article 280 details the types of surge protection, their ratings, and installation practices to ensure that SPDs are effectively integrated into both residential and commercial electrical systems. Understanding this article is essential for electricians and engineers who are responsible for implementing surge protection in electrical installations, ensuring the safety and reliability of electrical equipment.

While other articles, such as Article 300 and Article 310, cover broader electrical installation practices and conductors, they do not specifically focus on surge protection. Therefore, knowing that Article 280 addresses SPDs helps professionals navigate the necessary regulations when designing and installing relevant protective measures.