NFPA 111 addresses stored-energy emergency and standby power systems that provide an alternate electrical supply when normal power fails.
Define the Loads and Required Behavior
Identify the equipment the stored-energy system will support, its power demand, and the required operating duration. Include the supporting communications and network equipment needed for the intended function to remain available.
Document what should happen when normal power fails, during any transition to another source, and when normal power returns. Confirm the applicable requirements with the project’s designers and reviewing authority before selecting equipment.
Confirm Whether NFPA 111 Applies
The NFPA 111 publication addresses system performance, installation, operation, maintenance, and testing.
The adopted edition, system classification, supported loads, and project conditions determine the requirements that apply.
A product described as a UPS or battery backup is not, by that description alone, proof that it meets a project’s required alternate-power arrangement. Review equipment suitability, installation requirements, and the standards governing the supported systems together.
Coordinate the Complete Power Path
Review the stored-energy equipment, transfer arrangement, distribution path, environment, and supported devices as one system. Account for access for service and the conditions specified by the equipment manufacturer.
Where stored energy and a generator are both used, document their respective roles and the expected transition behavior. Generator-based emergency and standby power is covered separately in the NFPA 110 guide below.
Plan Verification and Maintenance
Define how the installed system will be tested and how the results will be recorded. Testing should demonstrate the required behavior of the supported functions under the conditions specified for the project.
Keep equipment information, load records, test results, service history, and unresolved deficiencies current. Reassess capacity and operating expectations when connected equipment changes or the backup system is replaced.
Review Security and Life-Safety Interfaces
Backup power planning must account for the required behavior of the systems it supports. For example, access-control continuity must remain coordinated with applicable egress requirements, while fire alarm power arrangements need their own system-specific review.
Assign responsibility for those interfaces so electrical, security, and life-safety work can be coordinated before installation and verified afterward.
Related Guides
Use these guides to coordinate stored-energy backup with generators, fire alarms, security wiring, and maintenance records.
- NFPA Standards for Commercial Security, Fire Alarm, Access Control, Wiring & Life Safety — Return to the NFPA standards directory.
- NFPA 110 Emergency and Standby Power Systems for Fire Alarm and Security — Review emergency and standby power under NFPA 110.
- NFPA 72 Fire Alarm Standards for Commercial Buildings — Review commercial fire alarm standards.
- NFPA 70 NEC and Low-Voltage Security System Wiring — Review low-voltage wiring coordination.
- Security System Documentation, Testing, and Inspection Readiness — Organize testing and maintenance records.
Request a Backup-Power Review
Request an assessment to review supported security equipment, continuity expectations, and backup-power coordination.