What conditions must be met for a system that requires two automatic detectors to initiate an alarm?

For a system that requires two automatic detectors to initiate an alarm, one key condition is that the system must not be prohibited by the authority having jurisdiction. This means that local laws, codes, or regulations governing fire safety and alarm systems must permit the use of such a configuration. The authority having jurisdiction can set specific requirements based on local risk assessments, building types, or other safety considerations. If the regulations do not allow for this kind of system setup, it cannot be implemented regardless of whether the other conditions are met.

Selecting the correct option reflects an understanding of the regulatory framework that governs fire alarm installations, emphasizing the importance of adhering to local fire safety codes and standards.