A fire alarm system is required to have how many sources of power?

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Multiple Choice

A fire alarm system is required to have how many sources of power?

Explanation:
Reliability during power outages is the key idea. A fire alarm system must stay powered even if the building loses electricity, so it uses two sources of power: a primary supply from the building’s electrical system and an independent backup, typically a rechargeable battery (and sometimes a generator). The system is designed to automatically switch to the backup when the main power fails, keeping alarms, detection, and control functions active. This redundancy protects life safety by ensuring the system continues to operate during power interruptions.

Reliability during power outages is the key idea. A fire alarm system must stay powered even if the building loses electricity, so it uses two sources of power: a primary supply from the building’s electrical system and an independent backup, typically a rechargeable battery (and sometimes a generator). The system is designed to automatically switch to the backup when the main power fails, keeping alarms, detection, and control functions active. This redundancy protects life safety by ensuring the system continues to operate during power interruptions.

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