In a fire alarm system connected to a supervising station, what other device must also be installed on the premises?

In a fire alarm system that is connected to a supervising station, a manual pull station must be installed on the premises to ensure that occupants can manually trigger the alarm in the event of a fire. This device is critical because it provides a means of alerting the fire alarm system immediately when occupants are aware of a fire incident, especially in scenarios where automatic detectors may not respond in time or someone is present who can see the fire before the system’s automatic detection systems are activated.

Manual pull stations are typically located near exits or in high-traffic areas to increase the likelihood that someone can access them quickly in an emergency. Their presence not only enhances safety by allowing for a prompt response but also supports the overall functionality of the fire alarm system, which relies on a combination of automatic detection and manual intervention.

While smoke detectors and heat detectors are important for detecting fires, they are automatic devices that may not always be sufficient in rapidly alerting occupants. The fire alarm panel, while crucial for monitoring and control, is not a device that occupants can use to manually initiate an alarm. Therefore, the manual pull station is a vital component that complements the fire alarm system's functionality in a supervised environment.