Emergency Lighting Calculator
AS/NZS 2293.1:2017 Compliance
Inputs
Total enclosed floor area served by emergency system
Maximum travel distance from furthest point to exit
AS/NZS 2293.1 Clause 6.2.2; includes 25% aging margin
Results
Emergency Luminaires Required
50
units
Minimum illumination (floor level)
1.95 lux (Limit: 1 lux >=)
Minimum illumination (open areas)
20 lux (Limit: 0.2 lux >=)
Maximum luminaire spacing
0.8 m (Limit: 4 m <=)
Exit sign coverage
2 signs (Limit: 2 signs >=)
Battery duration capacity
17 Ah (Limit: 11.323529411764707 Ah >=)
Emergency Lighting Design Guide — AS/NZS 2293.1:2017
Emergency escape lighting systems provide illumination during power failure to enable safe evacuation. This calculator determines the number of luminaires, exit signs, total load, and battery capacity required for compliance with AS/NZS 2293.1:2017.
Key Requirements
- Minimum illumination: 1 lux on escape routes, 0.2 lux in open areas (AS/NZS 2293.1 Table 3.1)
- Maximum spacing: 4 metres between emergency luminaires along escape routes (Clause 5.2.2)
- Exit signs: Minimum one per exit, plus additional signs for large areas (Clause 5.3)
- Battery duration: 90 minutes (standard) or 120 minutes (extended) with 25% aging margin (Clause 6.2.2)
- System voltage: Typically 24V DC for battery-backed emergency luminaires
Building Type Considerations
- Residential: Lower occupancy density; simpler escape route requirements
- Commercial: Standard reference case; moderate occupancy; regular escape routes
- Industrial: Hazard areas; higher luminaire density for worker safety
- Assembly: High occupancy and crowd dynamics; comprehensive exit sign coverage required
Disclaimer: These results are indicative only. Emergency lighting systems must be designed and verified by a qualified electrical engineer in accordance with AS/NZS 2293.1:2017 and AS/NZS 2293.2:2017 (maintenance procedures) before installation. Actual product selection and photometric verification are required on-site.