What systems are defined in Article 701?

Article 701 of the National Electrical Code (NEC) specifically addresses Legally Required Standby Systems. These systems are required to ensure that critical loads remain powered during a utility power outage, thereby protecting life and property. Legally Required Standby Systems have specific requirements and criteria that must be met, particularly in facilities where a power outage could lead to hazardous conditions.

This article delineates standards for the installation, operation, and maintenance of backup power systems, which are crucial in environments like hospitals, fire stations, and other essential services. The focus on adequacy and reliability ensures that these systems will function as intended when needed, safeguarding essential operations.

Other options, while related to power systems, pertain to different categories outlined in the NEC. For instance, Emergency Systems focus more broadly on life safety systems that operate automatically to provide power during emergencies, which is distinct from the legally required standby systems that focus more on maintaining essential services. Fuel Cell Systems and Wind Electric Systems are considered under separate articles and not specifically defined in this context of Article 701.