Which system is required to have standby power capable of operating the system for 24 hours in normal operation?

Which system is required to have standby power capable of operating the system for 24 hours in normal operation?

• A. Local System
• B. Household Systems
• C. Remote Station System
• D. Central Station System

Answer: (A)

Standby power duration is about how long a fire alarm system must keep running on its back‑up energy when the normal power is out. For a local fire alarm system, the requirement is that the standby power can operate the system for 24 hours in normal operation. This matters because a local system isn’t relying on a remote monitoring service or external facilities to stay powered; it has to continue detecting, signaling, and annunciating alarms on site even if the building loses power for a full day. Household systems, remote station systems, and central station systems have different configurations and monitoring arrangements, so their standby requirements are not the defining factor in this question. The key idea is that only the local, on-site system is specified to maintain full operation for 24 hours purely from standby power.

Standby power duration is about how long a fire alarm system must keep running on its back‑up energy when the normal power is out. For a local fire alarm system, the requirement is that the standby power can operate the system for 24 hours in normal operation. This matters because a local system isn’t relying on a remote monitoring service or external facilities to stay powered; it has to continue detecting, signaling, and annunciating alarms on site even if the building loses power for a full day. Household systems, remote station systems, and central station systems have different configurations and monitoring arrangements, so their standby requirements are not the defining factor in this question. The key idea is that only the local, on-site system is specified to maintain full operation for 24 hours purely from standby power.