Fire alarm guides built for working engineers
Practical, source-led guidance covering fault finding, panel workflows, maintenance, BS 5839 practice, and AI-assisted engineering workflows.
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Digital Fire Alarm Log Book: What It Must Record
What belongs in a fire alarm log book, who is responsible for it, and what changes when it moves from a folder on the wall to a digital record.
BS 5839 Battery Calculation: A Practical Guide
How to size fire alarm standby batteries the way BS 5839-1 expects: quiescent load, alarm load, capacity margin, charger check and what to record on site.
Fire Alarm Voltage Drop: Calculation and Field Checks
Why fire alarm circuits fail at the far end: how to calculate voltage drop on sounder and loop circuits, what to measure on site, and what to record in the report.
Fire Alarm Service Report Template: What to Include
What a fire alarm service report should contain to stand up later: scope, findings, limitations, disablements and recommendations, separated so nobody has to guess.
How Fire Alarm Detectors Work: Smoke, Heat, Multi-Sensor and Beam Detectors Explained
Learn how smoke, heat, multi-sensor, beam and aspirating fire detectors work, where they should be used and their advantages and limitations.
Addressable vs Conventional Fire Alarm Systems: What's the Difference?
Learn the difference between addressable and conventional fire alarm systems, including how they work, advantages, disadvantages and which is best for your building.
Fire Alarm System Categories Explained: L1, L2, L3, L4, L5, P1, P2 and Category M
Understand every fire alarm category including L1, L2, L3, L4, L5, P1, P2 and Category M. Learn where each system is used and how they differ.
Fire Alarm Fault Finding Guide: How to Diagnose Common Fire Alarm Faults
Learn how to diagnose common fire alarm faults, including loop, device, power, battery and earth faults, using a safe and structured process.
Fire Alarm Maintenance Checklist
A practical fire alarm maintenance checklist covering pre-service review, panel checks, device testing, batteries, records and follow-up actions.