NFPA 99, 1999 edition, chapters 3-18.104.22.168 and 3-22.214.171.124 say essential electrical systems must have two or more independent power sources, a normal source and at least one alternate source. The alternate source must be a generator located on the premises.
Chapter 16 allows an exception for nursing homes. Some of the conditions for the exception are that there be no need for general anesthesia during surgery, no need for electrically sustained life support, and a battery system in in place. See the standard or call me for complete details. Each facility must be evaluated on its own.
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.
The assistance I provide is based on the questions you ask and the accuracy of the information you provide about your equipment or project. I cannot guarantee you will like or agree with my response.
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