Litewel Electronics India Pvt Ltd
Emergency Light Manufacturer and Specialist in Mumbai, India

Emergency Lighting Design Guide

The following guide details how to set up an Emergency Lighting and evacuation system at your workplace, meeting the design requirements of BS 5266 Part 7: 1999.
 

Step 1

Identify mandatory “Points of Emphasis” for the positioning of luminaires, examples as follows:

Final Exit
Final Exit
At each exit door
Exit Signs
Exit Signs
At all safety exit signs
Direction Change
Direction Change
Within two metres of a change in direction
Intersections
Intersections
Within two metres of an intersection
 
Different Levels
Different Levels
At a change of level
Stairways
Stairways
Within two metres of each staircase ensuring that each step is lit
Final Exits
Final Exits
Outside within two metres of each final exit door
Alarm Areas
Alarm Areas
Within two metres of fire alarms, first aid points and fire fighting equipment
 

Step 2

Ensure that the exit signs are the correct format and size

Signs which are provided at all exits intended to be used in an emergency and along escape routes shall be illuminated to indicate unambiguously the route of
escape to a point of safety. Where direct sight of an emergency exit is not possible, an illuminated directional sign (or series of signs) shall be provided to assist progression towards the emergency exit.

Maximum viewing distance:

Internally illuminated signs - 200 x the panel height
Externally illuminated signs - 100 x the panel height
 

Step 3

Locate emergency luminaires at the following essential areas:

Escalators
Escalators
Escalators should not be used as an escape route but requires illumination to protect users when power fails
Toilets
Toilets
Install in all toilets exceeding 8 square metres or where natural light is not present
Lifts
Lifts
Emergency lighting to be provided in all lifts
Control Rooms
Control Rooms
Motor generator, control and plant rooms for essential safety services
 
Hazardous Areas
Hazardous Areas
Areas of high risk should be illuminated to 10% of normal lighting level or 15 lux whichever is the greater
Open Areas
Open Areas
Open areas with either a particular hazard or an escape route passing through it when larger than 60 square metres
Indoor Car Parks
Indoor Car Parks
Covered car parks specifically escape routes
 

Step 4

When points of emphasis and essential areas are covered it is necessary to provide additional luminaires to ensure that the minimum illuminance level of 1 lux is achieved anywhere on the centre line of an escape route. A uniformity ratio of 40:1 maximum to minimum must not be exceeded.

 

Step 5

For open (anti-panic) core areas larger than 60 square metres with an escape route passing through them a minimum lighting level of 0.5 lux should be provided.
This excludes a 0.5 metre perimeter of the area

Example of Design System

 

STEP 1

Locate luminaires at points of emphasis on escape routes.

  • At each exit door (A)
  • Illuminate exit and safety signs (B)
  • Near call points (C)
  • Near each staircase (D)
  • Change of direction (E)
  • Near fire fighting equipment (F)
  • Change of floor level (G)
  • Near intersections of escape routes (H)
  • Outside final exits (I)
  • Near first aid points (K)

STEP 2

Check that the maximum viewing distances of the exit signs are not exceeded. Please note that for cinemas and theatres signs must be permanently
illuminated whilst the building is occupied.

STEP 3

Identify additional areas that require emergency lighting.

  • Lift cars (1)
  • Toilets greater than 8 square metres (2)
  • Escalators (3)
  • Motor generators, control and plant rooms (4)
  • High risk areas (5)

STEP 4

Check to ensure that minimum luminance levels are achieved on the escape routes.

STEP 5

Check to that open areas greater than 60 square metres have a minimum luminance level of 0.5 lux. (X)

The information above is intended as guidance in meeting the design requirements of BS 5266 Part 7: 1999.
It is important to check with the relevant local authority as some may impose additional requirements.