For which system is physical testing required at reasonable intervals?

Physical testing of alarm systems, particularly Class "E" and "J" alarm systems, is mandated at reasonable intervals to ensure their functionality and reliability in emergency situations. These systems are crucial for alerting occupants of a building to any potential fire or other emergencies, and regular testing is essential to confirm that they are operating as intended.

Class "E" systems are specifically designed for use in high-rise buildings and are integral to the building’s overall fire safety strategy. The requirement for regular testing stems from the need to maintain compliance with safety codes and standards, which dictate the performance and reliability of alarm systems in protecting lives and property.

Regular physical testing helps identify any malfunctions or necessary maintenance, thereby minimizing the risk of failure when the systems are most needed. This ensures that the systems can effectively communicate emergencies to occupants and local fire services, ultimately saving lives and preventing damage.

In contrast, while other systems like fire alarm systems, central station connections, and smoke ventilation systems may also have testing requirements, the specific context of Class "E" and "J" systems underlines the importance of regular physical testing due to their unique operational demands and the environments in which they are deployed.