What is the minimum operational voltage percentage for fire alarm equipment?

The minimum operational voltage percentage for fire alarm equipment is stipulated as 85%. This standard ensures that fire alarm systems function reliably and effectively in emergency conditions. The 85% voltage level is crucial because it represents the threshold at which fire alarm devices can perform properly without risking failure. Under this voltage, devices like detectors and notification appliances can activate as intended, ensuring that they respond promptly to fire conditions or alarms.

Operating below this percentage can lead to malfunction or inadequacy in the device's response, potentially compromising safety. Therefore, maintaining equipment at or above this minimum voltage is essential for ensuring the effectiveness of fire alarm systems in providing reliable protection against fire hazards.