Which article covers systems that are not legally required but can be used for standby power?

Article 702 of the National Electrical Code (NEC) addresses optional standby systems. These systems are not mandated by law but are intended to provide backup power in case of utility service interruptions. They are installed in various settings such as commercial buildings, residential properties, and other facilities where maintaining critical functions is important during emergencies.

The focus of this article is on ensuring that these systems are safely designed and installed, allowing for proper operation in times when the primary power source fails. It sets forth requirements for these systems, including the generation and distribution of power, to ensure they can reliably deliver electricity when needed.

In contrast, other articles mentioned deal with different aspects of electrical systems, such as interconnected systems (Article 705), critical operations power systems (Article 708), and fire alarm systems (Article 760), which do not focus specifically on standby power that is not required by law.