What identifying feature is required for circuit disconnecting means in fire alarm systems?

In fire alarm systems, the circuit disconnecting means must have a permanent identification feature. This requirement ensures that any personnel involved in maintenance, repair, or emergency situations can quickly and accurately identify the function of the disconnecting means. This is critical in situations where immediate action may be necessary, such as during a fire incident.

Permanent identification helps ensure that there is no confusion regarding which circuit should be disconnected in case of a fire alarm system requiring maintenance or during emergencies. This can reduce response time and enhance safety by preventing accidental disconnection of the wrong circuit, thus maintaining the integrity and functionality of the fire alarm system.

In contrast, while labels with system names, colored markers, or code compliance stickers may aid in identification, they do not meet the requirement for permanence and could become unreadable or removed over time, compromising safety and functionality. Therefore, permanent identification is the most reliable method to ensure that the disconnecting means is quickly recognizable and ensures compliance with industry standards and safety regulations.