Yes, there are codes that require standby generators as emergency backup power sources for commercial buildings that are not non-health-care buildings, data centers, or high-rise buildings.

International Building Code (IBC) IBC Section 403.3 requires standby generators for buildings that contain Group A occupancies (assembly) with an occupant load of 500 or more, or Group B occupancies (business) with an occupant load of 1,000 or more.

National Fire Protection Association (NFPA) NFPA 110, Standard for Emergency and Standby Power Systems provides guidance on the installation and testing of standby generators. NFPA 101, Life Safety Code requires standby generators for: Buildings with occupancies where a loss of power could endanger life or property, such as hospitals, nursing homes, and schools. Buildings with sprinkler systems that require backup power to maintain water pressure.

Local Codes Local building codes may also have requirements for standby generators in certain types of commercial buildings. It is essential to check with the local authority having jurisdiction (AHJ) to determine the specific requirements applicable to your building.

Note: The requirements for standby generators can vary based on the specific occupancy and use of the building, as well as the local jurisdiction. It is recommended to consult with a qualified electrical engineer or building code expert for specific guidance on your project. Flag for review