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Emergency Lighting Battery & Duration Check
Check emergency lighting batteries to BS 5266-1 / EN 50171: luminaire schedule to central battery system rating, energy and standard battery size for a 3 h or 1 h duration, or a self-contained luminaire duration check.
The Ensign ToolboxEmergency Lighting Battery & Duration CheckCheck emergency lighting batteries to BS 5266-1 / EN 50171: luminaire schedule to central battery system rating, energy and standard battery size for a 3 h or 1 h duration, or a self-contained luminaire duration check.
System & duration
Central battery sized here; self-contained is a duration check
3 h standard; 1 h only with immediate evacuation and no re-occupation until recharged
h
EN 50171 end-of-life margin; 1.25 = 25 %
1 for DC systems; AC systems: manufacturer's emergency-mode figure
Used to express the system rating in VA
V
e.g. 24 / 50 / 110 — enables the Ah requirement and battery ladder
Ah
Check an existing/proposed battery against the requirement
Luminaire / circuit schedule
No luminaires added yet
Add a luminaire/circuit row to calculate