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NOTE: This is an unformatted excerpt from our online fire protection training library.

Authorities and Requirements

Summary

Power Supplies

Fire alarm system power supply requirements are found in two places: NFPA 70, the National Electrical Code (NEC), and NFPA 72, the National Fire Alarm Code. The electrical design requirements for the operation and construction of the power supply are contained in the NEC. The arrangement of the power supply is found in NFPA 72.

Basically, the power supply to the fire alarm system must be dedicated to the fire alarm system. Primary and secondary power supplies are required for all fire alarm systems, and both must have the capacity to supply the fire alarm system independent of the other. The secondary power supply has to power the system for a defined period of time and has specific requirements for its arrangement.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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