7.10 Categories of operation of emergency lighting systems
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Categories of operation are specified in BS EN 50172:2004/BS 5266-8:2004, 5.6.
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In this standard, emergency lighting systems are classified according to the following parameters, as given for luminaires in BS EN 60598-2-22:1999, Annex B:
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a) Type:
X self-contained;
Y central supply;
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b) Mode of operation:
0 non-maintained;
1 maintained;
2 combined non-maintained;
3 combined maintained;
4 compound non-maintained;
5 compound maintained;
6 satellite;
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c) Facilities:
A including test device;
B including remote rest mode;
C including inhibiting mode;
D high risk task area luminaire;
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d) Duration of emergency mode (in minutes) for a self-contained system:
10 to indicate 10 min duration;
60.............1 h duration;
120............2 h duration;
180............3 h duration.
Previously, emergency lighting systems were categorized by the prefix “M” for maintained and “NM” for non-maintained systems, followed by an “/” and the number of hours duration claimed for the installation, e.g. for self-contained systems:
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M/1 was a maintained 1 h duration system; this is now [X][1][****][60]
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NM/3 was a non-maintained 3 h duration system; this is now [X][0][****][180]
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NOTE **** in the third box stands for the facilities [see item c)], details of which are added, as applicable, at the time of installation.
