The latest amendment to British Standard BS 5839-6:2019+A1:2020 introduces key changes to fire alarm system classifications. These updates ensure a clearer definition of alarm system grades, enhancing fire safety in residential properties.

What’s New?

The amendment includes new system grades, with significant modifications to Grade C and the replacement of Grades D and F with subcategories D1, D2, F1, and F2.

Revised Alarm System Grades:

Grade C – A fire detection system with alarm sounders, powered by both mains and a standby supply, controlled through a central unit.

Grade D1 – (For new builds and existing properties) Mains-powered detectors with a tamper-proof battery as a standby power source.

Grade D2 – Mains-powered detectors with a user-replaceable backup battery.

Grade F1 – Battery-powered detectors with a tamper-proof primary battery.

Grade F2 – Battery-powered detectors with a user-replaceable primary battery.

These updates aim to improve fire safety standards in homes by ensuring clarity in system requirements and installation compliance.