Emergency systems are intended to automatically supply illumination or power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply , distribute, and control power and illumination essential for safety to human life.
Equipment Approval. The authority having jurisdiction shall conduct or witness a test on the complete system upon installation and periodically afterward. Systems shall be tested periodically on a schedule acceptable to the authority having jurisdiction to assure their maintenance in proper operating condition. Means for testing all emergency lighting and power systems during maximum anticipated load conditions shall be provided.
An emergency system shall have adequate capacity and rating for all loads to be operated simultaneously. The emergency system shall be suitable for the maximum available fault current at its terminals. Wiring, Emergency System. Wiring of two or more emergency circuits supplied from the same source shall be permitted in the same raceway, cable box or cabinet.
Wiring from an emergency source or emergency source distribution overcurrent protection to emergency loads shall be kept entirely independent of all other wiring and equipment, unless otherwise permitted in 1 through 4 :. General Requirements. Current supply shall be such that, in the event of failure of the normal supply to, or within, the building…emergency lighting, emergency power, or both will be available within the time required for the application, but not to exceed 10 seconds.
Batteries…shall be designed and constructed to meet the requirements of emergency service and shall be compatible with the charger for that particular installation. For a sealed battery, the container shall not be required to be transparent.
If using a computer-controlled system, the system should be capable at all times of providing a report of testing history as well as any failures that occur. The edition on the Code also added a fourth option specifically for the testing of your EPSS equipment for your emergency lighting system as opposed to the lighting system itself.
With this option, the Code refers to NFPA for the testing of emergency generators and related transfer switches and to NFPA for testing stored electrical energy systems that provide an alternate source of electrical power.
Contact Koorsen today with any questions you have on NFPA and for the help you need to ensure full compliance of your emergency lighting system. Disclaimer: The information in this article is for informational purposes only. It does not constitute professional advice. The user of this article or the product s is responsible for verifying the information's accuracy from all available sources, including the product manufacturer. The authority having jurisdiction should be contacted for code interpretations.
NFPA Section 7. Still Have Questions? Intro to Emergency Lighting. Subscribe to Our Blog. Illumination levels should be permitted to decline to 0. A maximum-to-minimum illumination uniformity ratio of 40 to 1 should not be exceeded. A continuous and unobstructed way of travel from any point in a building or structure to a public way consisting of three separate and distinct parts: 1 the exit access, 2 the exit, and 3 the exit discharge. That portion of a means of egress that is separated from all other spaces of the building or structure by construction, location, or requirement as required to provide a projected way of travel the exit discharge.
That portion of a means of egress that leads to an exit.
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