A residential fire alarm must have how many power supplies?

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Pass the California Alarm Company Operator Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

A residential fire alarm must have how many power supplies?

Explanation:
Two power sources are used in a typical residential fire alarm to keep the system running during a power failure. The primary supply is the normal AC power, and a secondary supply, usually a backup battery, provides power if the main power goes out. This setup ensures the alarm can operate and alert occupants when electricity is unavailable, which is essential for life safety. A single power source could fail during an outage, and having more than two isn’t required for standard residential systems, making the two-supply arrangement the correct approach.

Two power sources are used in a typical residential fire alarm to keep the system running during a power failure. The primary supply is the normal AC power, and a secondary supply, usually a backup battery, provides power if the main power goes out. This setup ensures the alarm can operate and alert occupants when electricity is unavailable, which is essential for life safety. A single power source could fail during an outage, and having more than two isn’t required for standard residential systems, making the two-supply arrangement the correct approach.

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