The programmable sounding control unit for a mercantile burglary alarm system must activate the sounding device for at least how many minutes upon alarm?

The requirement for the programmable sounding control unit within a mercantile burglary alarm system is established to ensure that the alarm remains active long enough to alert personnel and to deter potential intruders. The regulation mandates that upon activation, the sounding device must operate for a minimum of 15 minutes. This duration is significant because it is generally believed that a longer alarm signal increases the likelihood of detection by security personnel or law enforcement and can discourage intruders from remaining on the premises.

Setting the time to 15 minutes strikes a balance between ensuring sufficient time for response while preventing unnecessary prolonged disturbances. This standard is reflective of practices designed to enhance the effectiveness of alarm systems in protecting commercial properties, ensuring compliance with safety codes, and minimizing false alarm scenarios.

In contrast, options suggesting longer durations may not align with the operational practicality and the intent to maintain an appropriate balance between efficacy in response and the potential for nuisance alarms.