UL 924

Please note: All interim revisions for this edition available at time of your purchase will be included.

1 Scope
1.1 This Standard applies to emergency lighting and power equipment for use in unclassified locations and intended for connection to branch circuits of 600 volts or less. Such equipment is intended to automatically supply illumination or power or both to critical areas and equipment in the event of failure of the normal supply, in accordance with Article 700 or 701 of the National Electrical Code, NFPA 70, the Life Safety Code, NFPA 101, the Fire Code, NFPA 1, the International Building Code, IBC, and the International Fire Code, IFC.

1.2 Examples of equipment described in 1.1 include:

Exit Signs
Emergency Luminaires
Unit Equipment
Central Station Battery Banks
Inverters
Automatic Battery Charging and Control Equipment
Automatic Load Control Relays
Derangement Signal Equipment

1.3 This Standard also applies to auxiliary lighting and power equipment for use in unclassified locations. Auxiliary equipment has not been investigated to determine compliance with the performance requirements of Article 700 or 701 of the National Electrical Code, NFPA 70, the Life Safety Code, NFPA 101, or the International Building Code. Such equipment includes luminaires with an integral battery backup power supply, illuminated directional signs, battery assemblies, and related devices.

1.4 This Standard does not include requirements for equipment covered by other Standards, such as:

Luminaires, UL 1598
Uninterruptible Power Systems, UL 1778
Luminous Egress Path Marking Systems, UL 1994
Transfer Switch Equipment, UL 1008
Electric Signs, UL 48