What is the maximum time after which inaccessible fire alarm devices must still be tested?

Testing of fire alarm devices is critical to ensure that they will function properly in the event of a fire. In situations where certain devices are inaccessible — for example, due to them being installed in hard-to-reach or obstructed areas — there are specific guidelines in place to maintain safety standards.

The requirement is that such inaccessible fire alarm devices must be tested at a maximum interval of 18 months. This ensures that even if a device is not easily reachable for regular checks, it will still be evaluated for functionality and reliability within a reasonable timeframe. This guideline is important as it helps to verify that the fire alarm system remains up to code and can perform when needed, thereby ensuring the safety of occupants in the facility.

Other timeframes provided may seem reasonable but do not align with the established safety standards. For instance, options suggesting longer intervals extend beyond what's considered safe practice for regular testing of fire alarm systems, which could potentially leave installations inadequately monitored for prolonged periods. This could lead to unforeseen failures in critical moments, hence the importance of adhering strictly to the 18-month maximum threshold for testing inaccessible devices.