ESP BS5839 Manual page 2

WELCOME
This guide has been developed to highlight the key
points of the latest version of the standard:
BS5839 Fire detection and fire alarm systems for
buildings – Part 1 2017: Code of practice for design,
installation, commissioning and maintenance of
systems in non-domestic premises.
The guide should not be used as a substitute for the
standard.
This guide will be of particular interest for those
designers and installers that need simple guidance
to the selection, spacing and location of fire devices.
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CATEGORIES
Fire Alarm and Fire Detection systems are categorised
in the following way:
P1 P2
L4 L3 L1 L2
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P - AFD* designed to primarily
protect property
P1 - AFD installed throughout
all areas
P2
- AFD Installed only in
defined areas
L - AFD designed to primarily
protect human life
L1 - AFD installed throughout
all areas
L2
- AFD Installed in defined
areas in addition to L3
L3 - AFD installed in escape
routes and rooms opening
onto these routes
L4 - AFD installed in escape
routes comprising circulation
areas and spaces such as
corridors and stairways
L5 - A non-prescriptive system
in which the protected
area(s) is designed to satisfy
a specific fire risk objective
(other than that of L1 to L4)
M - System designed to be operated
manually (no AFD)
*AFD = Automatic Fire Detection
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