When approved by the AHJ, what is the highest precedence allowed for a hold-up alarm?

In fire alarm and security systems, the precedence of alarms is crucial to ensuring a quick and effective response to emergencies. The correct choice indicates that a hold-up alarm has a higher precedence than supervisory and trouble conditions, but lower than alarms.

When approved by the Authority Having Jurisdiction (AHJ), prioritizing a hold-up alarm just after alarm signals ensures that any immediate threats to safety—such as robbery or personal safety incidents—are addressed urgently while still maintaining clarity in the overall alarm hierarchy.

The precedence order in the chosen option prioritizes life safety and direct threats above system integrity issues (like supervisory signals or trouble signals). A hold-up alarm typically requires immediate action, thus its placement after general alarms reflects the need for rapid response to situations where personal safety is at stake. This arrangement enables security personnel and local authorities to prioritize response actions effectively, ensuring that potential life-threatening situations are addressed without unnecessary delay.

This understanding helps in designing effective alarm systems that protect lives, maintain clear communication about the nature of alerts, and allow for expedient response strategies in real-world scenarios.