What type of systems does Article 701 focus on?

Article 701 of the National Electrical Code (NEC) specifically addresses Legally Required Standby Systems. These systems are crucial for maintaining power supply for essential facilities that must remain operational during utility power outages. This article provides guidelines and requirements concerning their installation, maintenance, and operation to ensure safety and reliability.

Legally Required Standby Systems are designed to supply power for equipment needed to protect life and property or to keep the premises operating safely when the normal utility supply fails. Examples of such systems include lighting for exit signs, fire alarm systems, and some healthcare facility equipment. The NEC outlines standards that help ensure these systems function properly and provide the necessary power when they are called upon.

In contrast, the other options pertain to different aspects and types of backup power systems that may have unique requirements not covered under Article 701. Optional standby systems, for example, are intended for convenience and are not necessarily legally mandated. Interconnected electric power production sources deal with integrating renewable energy systems with the grid, while critical operations power systems address the specific needs of vital infrastructure but are covered under different NEC articles. Therefore, understanding that Article 701 focuses specifically on Legally Required Standby Systems helps clarify the intended use and regulatory framework for these important installations.