Kerova

Engineer Tools · Quick reference

Quick reference guides

Search the standards for the answer you need, in plain language. Each answer shows the edition and whether it is confirmed, and links to the calculator that goes with it. You can switch any answer to simpler wording.

The guides

BS 5839-1Fire detection and alarm systems in non-domestic premises2025 · 49 answersBS 5839-6Fire detection and alarm systems in domestic premisesBS 5839-6:2019+A1:2020 · 16 answersBS 5266-1 and BS EN 1838Emergency lightingBS 5266-1:2025, BS EN 1838:2024 · 20 answersBS 5306 (extinguishers)Portable fire extinguishers: servicing, siting and coloursBS 5306-3:2017, BS 5306-8:2023, BS 5306-10:2019 · 15 answersBS EN 50131-1 and PD 6662Intruder and hold-up alarm systemsBS EN 50131-1:2006+A3:2020, PD 6662:2017 · 16 answersBS 8418Detector-activated video surveillance systemsBS 8418:2021 · 12 answersBS EN 62676-4CCTV: application guidelinesBS EN IEC 62676-4:2025 · 11 answersBS EN 60839-11-1Electronic access control systemsBS EN 60839-11-1:2013 · 11 answersBS 7273-4Doors that release when the fire alarm soundsBS 7273-4:2015+A2:2023 · 4 answersBS 7671 (for alarm and CCTV work)The IET Wiring Regulations, as they affect alarm and CCTV engineersBS 7671:2018+A4:2026 · 10 answers

Confirmed two or more sources agree, or a source quotes the standard. Check one source, or a detail that could not be confirmed. Check it against the standard.

Lost in the jargon? Paste a paragraph into Explain this text and it will explain the abbreviations and swap formal words for everyday ones. The glossary has the plain meaning of each term.

For guidance only. Always check against the current edition of the standard and the manufacturer's data.

Built by the engineer behind Kerova, certificate software for fire and security firms.