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

Power Supplies

Power Supplies

Connection Requirements

The primary power supply connection for the fire alarm system must be connected to a dedicated circuit. This means that the connection from the building's incoming power supply to the fire alarm system cannot be shared; the control panel must be the only connection on this circuit. This power feed must be protected against mechanical damage. For example, in an industrial environment, the feed would need protection from the possibility that the wiring could be "pinched" by a forklift accidentally striking a structural portion of the building in the vicinity of the power supply circuit.

The circuit breaker (or other circuit-disconnecting device) must have controlled access so it can only be accessed by authorized people. A locked electrical closet, a locking electrical panel, or a circuit breaker lock can all be used to control access.

Circuit-disconnecting devices must be clearly marked in red, using the words, "Fire Alarm Circuit" at the circuit-disconnecting means. Also, the location of the circuit breaker has to be identified at the fire alarm control unit.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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