Which of the following systems are categorized under Optional Standby Systems?

Optional Standby Systems, as defined in the National Electrical Code (NEC), are intended to provide backup power to critical loads during a utility power outage, but they are not required to be in operation at all times. Article 702 specifically addresses these systems, outlining their design and installation requirements in a way that supports facilities needing additional backup power without the same stringent requirements as emergency systems.

This article highlights the versatility and flexibility associated with Optional Standby Systems, making them suitable for various applications such as lighting, refrigeration, or other critical services where a loss of power would be detrimental but not life-threatening.

The other articles mentioned serve different purposes. While Articles 700 and 701 focus on Emergency Systems and Legally Required Standby Systems, respectively, which have more rigid operational expectations, Article 695 deals with Fire Pump Circuits, addressing essential systems necessary for fire safety. Each serves a unique role in ensuring safety and operational continuity, distinguishing them from the Optional Standby Systems categorized under Article 702.