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

Auxiliary Fire Alarm Systems

Form 4C is a typical connection to the public utility, with a secondary power supply that is developed using a motor generator or multiple generators. There is no requirement for battery backup supplies across the generator/rectifier circuit. Power from the generator(s) or rectifier(s) installed on every box circuit provide the power to box circuits.

The equipment must accomplish a transfer between one generator set and AC power within 30seconds.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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