What is the primary function of notification appliances in a fire alarm system?

The primary function of notification appliances in a fire alarm system is to notify occupants. These appliances, which include devices like alarms, bells, strobes, and speakers, are designed to alert people within a building to the presence of a fire or other emergency condition. Their primary role is to ensure that individuals can evacuate safely and promptly in response to an alarm, reducing the risk of injury or fatalities.

In a fire alarm system, while detection devices (not mentioned in the correct answer) are responsible for sensing heat or smoke, it is the notification appliances that communicate the emergency and ensure that occupants are informed and can take appropriate action. The ability to convey an urgent alert through audible and visual signals is critical in a fire emergency, making this function essential for occupant safety.

Monitoring electrical current and managing system communications are important functions within the broader fire alarm system, but they are not directly related to the role of notifying people about danger, which is why those options do not align with the primary function of notification appliances.