The NEC® article that covers intrusion system installations in hazardous locations is _____.

NEC® Article 550 specifically addresses the installation requirements for intrusion detection systems in hazardous locations, particularly in environments where flammable gases, vapors, or dust might be present. This article establishes guidelines to ensure that electrical installations do not become ignition sources in such environments, thereby enhancing safety and compliance with regulatory standards.

This article encompasses a variety of critical aspects, including the types of equipment permitted, installation methods that mitigate risk, and the use of protective measures that are necessary to operate safely in hazardous conditions. Thus, the inclusion of these specific safety standards demonstrates the importance of ensuring that intrusion detection systems are designed to function effectively while preventing any potential hazards that may arise from their operation in adverse conditions.

The other articles mentioned focus on different aspects of electrical installations, such as grounding and bonding (Article 250), general wiring methods and materials (Article 300), or specific requirements for fire alarm systems (Article 780), and do not address the intricacies involved in installations specifically aimed at safeguarding hazardous locations.