EMEGRENCY LIGHTING SYSTEM

Emergency lighting systems and security lighting 
across South Wales

At Dragon Fire & Security Systems, we provide a wide range of emergency lighting systems and security lighting services. Keep your systems up to standard and ready to operate during an emergency. Our professional team offer competitively-priced services for installations, repairs, maintenance contracts, annual burn-downs and full certifications. For quality services across South Wales, Cardiff, Newport, Swansea, Bridgend and Bristol, choose Dragon Fire & Security Systems. 

Emergency lighting 

Used when a main power supply fails, emergency lighting minimises the risks of sudden darkness and dangerous circumstances. Emergency lighting systems are required to operate fully automatically and sufficiently illuminate an area to allow all people to evacuate safely. Most new buildings have emergency lighting installed during construction according to the relevant authority specifications. 

The British Standard provides guidelines from which an emergency lighting designer is to work to. The British Standard BS 5266: Part 1: 2005 includes residential hotels, clubs, hospitals, nursing homes, schools and colleges, licensed premises, offices, museums, shops, multi-storey dwellings and more. All standards are minimum safety standards and, depending on the type of building, a higher standard may be required for particular installations.
Emergency Lighting
Dragon Light Systems

Types of systems

Most emergency lighting systems fall into one of the following categories:
 Non-maintained: the emergency light units only illuminate in the event of a mains failure
 Maintained: the emergency light units are illuminated at all times using the same lamps for both normal and emergency operation
 Sustained: the emergency light units are fitted with two lamps or two sets of lamps; one of which operates on mains 240V AC supply and the other of which operates from the battery supply in the event of mains failure. It is basically a non-maintained system with the addition of mains lamps which should be illuminated whenever the premises are occupied
Most emergency lighting systems fall into one of the following categories:
 M3 - maintained system, emergency duration 3 hours
 NM2 - non-maintained system, emergency duration 2 hours
 S1 - sustained system, emergency duration 1 hour

Emergency luminaires 

An emergency luminaire will either be self-contained, with all components integral to the luminate body, or a slave to the central battery, where only the lamp is located within the body and the supply is fed from a centralised point. The majority of systems in the UK are self-contained, but both systems have different advantages and disadvantages. 

Central battery source 

Advantages
 Maintenance and routine testing is easier with only one location to consider
 Superior battery life - between 5 and 25 years dependent upon type
 Environmentally stable in a protected environment with luminaires able to operate at relatively high or low ambient temperatures
 Large batteries are cheaper per unit of power and luminaires are usually less expensive
Disadvantages
 High capital equipment costs
 High installation and wiring costs with essential MICC or Pirelli FP200 type cable to each slave luminaire
 Poor system integrity - failure of battery or wiring circuit can disable a large part of the system
 Requirement for 'battery room' to house cells and charger circuits etc, may also require ventilation of acid gases
 Localised mains failure may not trigger operation of emergency lighting in that area
 Voltage drop on luminaire wired furthest from the central battery could become a problem

Self-contained

Advantages
 Speedy and low cost installation
 Standard wiring material may be used (failure of mains supply due to cable burning through will automatically satisfy the requirement for a luminaire to be lit)
 Low maintenance costs - periodic test and general cleaning only required
 Low hardware equipment costs - no requirement for extended wiring, special ventilation etc
 Greater system integrity with each luminaire independent of the other
 System can easily be extended with additional luminaires
 No special sub-circuit monitoring requirements
Disadvantages
 Limited environmental operating range (batteries may be adversely affected by a relatively high ambient temperature)
 Battery life is limited to between 2 and 4 years dependent upon application
 Testing requires isolation and observation of luminaires on an individual basis
Generally, the decision to use either a central battery or a self-contained system is likely to be cost dominated. If an installation has longevity and low maintenance as priorities, then the higher cost of central battery may be justifiable on a very large project. Usually, luminaires and installation costs will be a major consideration, particularly on smaller jobs, and it is this criterion which makes the self-contained luminaire the most popular choice.

How much light? 

BS5266 recommends the provision of a horizontal illumination at floor level on the centre line of a defined escape route (permanently unobstructed) not less than 0.2 lux and 0.5 lux minimum for anti panic areas to exclude 0.5 metre border around the room. In addition, for escape routes of up to 2m wide, 50% of the route width should be lit to a minimum of 0.1 lux. Wider escape routes can be treated as a number of 2m wide bands. The actual degree of illumination should be closely related to the nature of both the premises and its occupants with special consideration being given to elderly homes, hospitals, crowded areas such as pubs, discos and supermarkets and to whether or not the premises are residential.

Areas to be covered

Legislation and British and European standards require emergency lighting to be installed in particular spaces. An emergency escape lighting system should normally cover the following areas: 
 Each exit door
 Escape routes
 Intersections of corridors
 Outside each final exit and on external escape routes
 Emergency escape signs
 Stairways so that each flight receives adequate light
 Changes in floor level
 Windowless rooms and toilet accommodation exceeding 8m2
 Firefighting equipment
 Fire alarm call points
 Equipment that would need to be shut down in an emergency
 Lifts and areas in premises greater than 60m2
It is not necessary to provide individual lights (luminaires) for each item above, but there should be a sufficient overall level of light to allow them to be visible and usable.
Dragon Company Area Lights
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Find out more about emergency lighting for your property.
call 0800 018 7772 
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