A battery operated emergency light is required for emergency generators as an automatic means to illuminate the EPSS in the event of a power failure. This requirement is found in the NFPA 110, Standard for Emergency and Standby Power Systems, 1999 edition, chapter 5-3.
Generators mounted inside of your building are required to have battery powered emergency lighting.
Generators mounted outside of your building are not required to have emergency lighting. This is because of an exception written at the end of chapter 5-3 that says the ��requirement shall not apply to units housed outdoors.�
Chapter 5-3 goes on to say that the charging system for the light must be supplied from the load side of the (automatic) transfer switch and provide at least 30 ft-candles of light.
The NFPA 70, National Electrical Code, 1999 edition, chapter 700-12 (e) further outlines the light�s requirements. It must:
Have a rechargeable battery.
Have a battery charger.
Have more than one lamp.
Be able to run for 1� hours
Supply no less than 60% of the initial illumination for 1� hours.
Be permanently fixed.
Have a cord no more than 3 feet long.
Be on the same circuit as the normal lighting and ahead of any local switches.
Generators and automatic transfer switches as well as their appurtenant devices employ high voltages that can hurt you. Do not attempt to work with this equipment unless you are qualified. Observe all rules and cautions found in the manufacturer�s manuals as well as NFPA 70E, Standard for Electrical Safety in the Workplace.
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