According to NFPA, what is required for quick opening devices?

The correct answer is based on the specific requirements outlined by the National Fire Protection Association (NFPA) regarding quick opening devices. Quick opening devices are used in fire protection systems, particularly those involving water supplies for fire suppression, such as sprinkler systems.

According to NFPA guidelines, quick opening devices must provide a sufficient water supply to meet the demands of a fire. The requirement of 500 gallons is often established as a standard to ensure that there is an adequate and immediate response capability to effectively control and extinguish a fire. This volume of water is deemed necessary to support the initial fire response and facilitate adequate protection during the initial moments of a fire incident.

The other options, while they may represent significant water volumes, do not align with the specific requirement set forth by NFPA for this application. Understanding these requirements is crucial for adhering to fire safety codes and ensuring that fire protection systems operate effectively in emergencies.