BS 5839-9:2021
Fire detection and fire alarm systems for buildings. Code of practice for the design, installation, commissioning and maintenance of emergency voice communication systems
https://doi.org/10.3403/30416720 (published 26/08/2021)
BS 5839-9:2021 is maintained by FSH/12/5. This standard is available from the following sources:
Other historical versions of this standard document also exist:
- BS 5839-9:2011 [current until 26/08/2021]
- BS 5839-9:2003 [current until 31/01/2011]