What is the practical implication of requiring two power sources for a fire alarm system?

What is the practical implication of requiring two power sources for a fire alarm system?

• A. It allows the system to operate on a single power source.
• B. It requires a backup power source in addition to the main power
• C. It eliminates the need for a battery
• D. It replaces all power sources with a generator

Answer: (B)

Having two power sources means the fire alarm system has a primary power supply plus a secondary, independent backup so it can keep operating if the main supply fails. The practical implication is that a backup power source is required in addition to the main power, ensuring the system remains functional during power outages. This redundancy is essential because life-safety alarms must continuously operate to protect occupants and aid emergency response. In most installations, the backup is a battery-backed UPS or an emergency generator, and the system automatically switches to it when the main power is lost. This setup prevents loss of alerts and maintains compliance with safety standards. The other options don’t fit because they suggest operating on a single source, removing the need for a battery, or relying only on a generator, which would compromise reliability and safety.

Having two power sources means the fire alarm system has a primary power supply plus a secondary, independent backup so it can keep operating if the main supply fails. The practical implication is that a backup power source is required in addition to the main power, ensuring the system remains functional during power outages. This redundancy is essential because life-safety alarms must continuously operate to protect occupants and aid emergency response. In most installations, the backup is a battery-backed UPS or an emergency generator, and the system automatically switches to it when the main power is lost. This setup prevents loss of alerts and maintains compliance with safety standards. The other options don’t fit because they suggest operating on a single source, removing the need for a battery, or relying only on a generator, which would compromise reliability and safety.