NFPA 111-2022 PDF

Full title and description

NFPA 111-2022 — Standard on Stored Electrical Energy Emergency and Standby Power Systems. This standard establishes performance, installation, operation, testing, and maintenance requirements for stored electrical energy systems (for example UPS and battery-based systems) and associated transfer, control, and supervisory equipment used to provide alternate electrical power to selected circuits when the normal supply fails.

Abstract

NFPA 111-2022 provides performance-based requirements for stored electrical energy emergency and standby power systems (SEPSS). It covers classification of SEPSS, energy sources and conversion equipment (batteries, converters, inverters), transfer switches and protection, controls and supervisory systems, and requirements for installation, testing, operation, and maintenance to ensure reliable, safe alternate power supply during utility outages. The 2022 edition incorporates revisions to align with stationary energy storage guidance (including alignment with NFPA 855).

General information

• Status: Superseded (replaced by NFPA 111:2025; 2022 edition listed as superseded by suppliers).
• Publication date: January 1, 2022 (2022 edition).
• Publisher: National Fire Protection Association (NFPA).
• ICS / categories: Fire safety / emergency power / electrical systems / energy storage and UPS (applies to building life-safety and mission-critical power continuity).
• Edition / version: 2022 edition (designated NFPA 111-2022).
• Number of pages: Vendor listings show the document in the ~27–31 page range (commonly listed as 27–31 pages depending on vendor format).

Scope

The standard applies to stored electrical energy systems used as alternate sources of electrical power for selected circuits in buildings and facilities when the normal supply fails. It addresses SEPSS classification, energy sources (including batteries and associated conversion equipment), transfer and load switching, controls, monitoring and supervisory functions, accessory equipment, installation, testing, commissioning, maintenance, and integration with other fire and life-safety systems. The 2022 edition was revised to improve alignment with stationary energy storage installation requirements.

Key topics and requirements

• Classification of stored-energy emergency power supply systems (SEPSS) by type, class, category, and level.
• Performance requirements for energy sources, converters, inverters, and associated accessories used to supply alternate power.
• Requirements for transfer switches, load switching, load shedding and protection of circuits served by SEPSS.
• Controls, supervisory equipment, instrumentation, and required monitoring/alarms for reliable operation and remote supervision.
• Installation and siting considerations (including ventilation, separation, enclosures, and electrical clearances) for battery systems and power conversion equipment.
• Requirements for commissioning, periodic testing, preventive maintenance, and documentation to ensure availability and longevity of SEPSS.
• Integration and coordination with related NFPA codes/standards (e.g., codes addressing fire protection, alarm/notification, and energy storage).

Typical use and users

NFPA 111-2022 is used by electrical designers and engineers, UPS and battery system manufacturers, contractors and installers, facility and data-center managers, healthcare facility engineers, code officials, and authorities having jurisdiction who need to specify or verify requirements for stored-energy emergency power to maintain critical loads during outages. It is commonly referenced where continuous power is essential (data centers, telecommunications, certain health-care functions, financial systems, and other mission-critical applications).

Related standards

Commonly referenced standards and codes that work with NFPA 111 include NFPA 110 (emergency and standby power systems), NFPA 855 (installation of stationary energy storage systems), NFPA 70 / NEC (electrical code), NFPA 72 (alarm and signaling), NFPA 70B (electrical equipment maintenance), and applicable local building and life-safety codes. Users should consult the referenced-publications chapter of NFPA 111 for a full list.

Keywords

SEPSS, stored electrical energy, UPS, battery systems, emergency power, standby power, transfer switch, inverter, commissioning, testing, maintenance, NFPA 111, energy storage safety, stationary energy storage, life-safety power.

FAQ

Q: What is this standard?

A: NFPA 111-2022 is the National Fire Protection Association’s standard that sets performance, installation, testing, operation, and maintenance requirements for stored electrical energy emergency and standby power systems (SEPSS) used to supply selected circuits when normal power fails.

Q: What does it cover?

A: It covers SEPSS classification, energy sources and conversion equipment, transfer switches and protection, controls and supervisory systems, installation and siting requirements for batteries and converters, commissioning, periodic testing, and preventive maintenance. The edition also aligns requirements with stationary energy storage guidance.

Q: Who typically uses it?

A: Electrical designers and consultants, manufacturers and installers of UPS/battery systems, facility and data-center managers, healthcare engineers, and code officials or authorities having jurisdiction who enforce or reference fire and life-safety codes.

Q: Is it current or superseded?

A: The 2022 edition has been superseded by NFPA 111:2025 (the 2025 edition is the most recent). Suppliers and standards stores list NFPA 111-2022 as superseded (supersession recorded in 2024) and recommend using the 2025 edition for current requirements. If you need the latest mandatory provisions, use NFPA 111:2025.

Q: Is it part of a series?

A: NFPA 111 is a standalone NFPA standard but is part of the broader NFPA family addressing power, energy storage, fire protection, and life-safety (it cross-references NFPA 110, NFPA 855, NFPA 70/NEC, and other NFPA documents).

Q: What are the key keywords?

A: SEPSS, UPS, batteries, stored electrical energy, emergency power, standby power, transfer switches, inverters, commissioning, maintenance, NFPA 111.