How does NFPA 20 address redundancy in fire pump systems?

How does NFPA 20 address redundancy in fire pump systems?

• A. Redundancy is optional.
• B. It requires standby power, jockey pump, and reliable power and control arrangements to ensure operation under fault conditions.
• C. It requires doubling the pump size.
• D. It prohibits standby power.

Answer: (B)

Redundancy in NFPA 20 means designing fire pump systems so they keep delivering water even if part of the system fails. To achieve this, NFPA 20 requires a standby power source so the pump can start and run if normal electrical power is lost. It also calls for a jockey pump to maintain system pressure and smooth out demand so the main pump isn’t subjected to sudden surges. In addition, reliable power and control arrangements are required so the pump can automatically start under fault conditions, switch to alternate power when needed, and be continuously supervised and tested to ensure readiness. This combination provides resilience against power outages and component failures, ensuring the pump can deliver the required flow during a fire. It isn’t about doubling pump size, nor is standby power prohibited, and the requirements aren’t optional for protected systems.

Redundancy in NFPA 20 means designing fire pump systems so they keep delivering water even if part of the system fails. To achieve this, NFPA 20 requires a standby power source so the pump can start and run if normal electrical power is lost. It also calls for a jockey pump to maintain system pressure and smooth out demand so the main pump isn’t subjected to sudden surges. In addition, reliable power and control arrangements are required so the pump can automatically start under fault conditions, switch to alternate power when needed, and be continuously supervised and tested to ensure readiness. This combination provides resilience against power outages and component failures, ensuring the pump can deliver the required flow during a fire. It isn’t about doubling pump size, nor is standby power prohibited, and the requirements aren’t optional for protected systems.