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EMERGENCY LIGHTING - INSTALLATION GUIDELINES

engineering

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                 DEPARTMENT OF PUBLIC WORKS

                                                           

                            EMERGENCY LIGHTING

                      INSTALLATION GUIDELINES


                                                   EMERGENCY LIGHTING

                                                            INSTALLATION

                                                                CONTENTS

CLAUSE

DESCRIPTION

PAGE NUMBER

1.

Applicable Standard Regulations

2.

Conduits

3.

Emergency Lighting Installation

4.

Illumination levels required

5.

Emergency escape lighting

6.

System integrity

7.

Emergency lighting system

8.

Emergency signs

9.

Drawings, Log Book and records




1.         Applicable Standard Regulations:

The following standard regulations shall be applicable on the emergency lighting Installation which forms part of this project:

SANS 0114-2: 1999:                                      Code of Practice: Interior Lighting: Part 2: Emergency Lighting.

SANS 1186-3                                                 Symbolic safety signs-Part 3: Internally illuminated signs.

SANS 1464-22                                               Safety of luminaires-part22: Luminaires for emergency lighting.

SANS 0114-1                                                 Interior lighting-part1: Artificial lighting of interiors.

SANS 0400                                                     National building regulations.

Act 85 of 1993                                                Occupational and Health Act.

SANS 0142                                                     Electrical installation regulations

2.         Conduits:

All conduits trunking systems, outlet boxes, sleeves etc, will be supplied and installed as part of this contract, complete with draw wires.

3.         Emergency Lighting Installation:

The complete emergency lighting installation forms part of this contract and must be supplied and installed in accordance with SANS 0114-2. The emergency lighting installation shall include the following:

Emergency escape lighting

Emergency lighting that provides illumination for the safety of people who are leaving a location on the premises or who are attempting to terminate a hazardous process before leaving the location.

Emergency escape route lighting.

Emergency lighting provided to enable people to exit safely from an area by providing visual information on the direction and exit points and safety equipment.

High risk task area lighting.

High risk task area lighting is provided in order for people to safely shut down potentially dangerous equipment or processes during a failure of the main power supply.

Open area anti-panic lighting.

Emergency lighting provided in large outdoor areas to prevent panic in the event of a power failure and if necessary to provide for the safe movement of people towards the exit points.

4.         Escape route requirements:

In the case of escape routes of width up to 2m, the horizontal illuminance on the floor along the centre line of the route shall be at least 0,3 lux. Escape routes of width exceeding 2m can be treated as a number of strips each of width 2m, or they can be provided with open area anti-panic lighting. In the case of horizontal illuminance, the ratio of the maximum to the minimum illuminance shall not exceed 40:1 along the centre line of the floor of the escape route. The escape route lighting shall activate within 25s to 30s of the failure of the normal lighting and shall reach the required illuminance within 60s.

In the case of open area anti-panic lighting the horizontal illuminance shall be at last 0,5 lux at the floor of the empty area and at a height of up to 0,5m on the perimeter of the area. The ratio of the maximum to the minimum illuminance shall not exceed 40:1. The open area anti-panic lighting shall activate within 25s to 30s of the failure of the nominal lighting shall reach the required illuminance within 60s.

In areas where high-risk tasks are undertaken, the average horizontal illuminance shall be equal to that demanded by the task. During emergency situations it shall be at least 10% of the normal lighting level or 20 lux, whichever is the greater, abnd shall be free of any harmfull stroboscobic effect. The ratio of the illuminance measured at the task to that measured at a horizontal distance 5m from the task shall not exceed 10:1 The duration of operation shall be at least 30 min, or the period for which people are at risk, whichever is the greater. High-risk task area lighting shall either permanently maintain the full required illuminance, or that illuminance shall be reached within 0,5s depending on the task.

5.         Emergency escape lighting:

General

Luminaires should be mounted at a height 2m to 2,5m above floor level. Illuminated signs, which shall be provided at all exits intended to be used in an emergency situation and along all escape routes, shall be so illuminated that they can indicate the escape route unambigously.

Where an emergency exit is not in direct view, an illuminated directional sign shall be provided to assist the progression of people towards the emergency exit.

An escape lighting luminaire that complies with SABS 1464-22 shall be sited to provide a minimum of 5 lux for a horizontal distance of 2m from each exit door and also where it is necessary to emphasize the existance of potential danger or the location of safety equipment.

Escape lighting luminaires shall be provided at the following:

a)         each exit door to be used in emergency,

b)         near stairs so the each flight of stairs receives direct light,

c)         near any change in level,

d)         where mandatory emergency exit and safety signs are installed,

e)         at each change of direction,

f)          at each intersection of corridors,

g)         outside and near each final exit,

h)         near each first aid post, and

i)          near each piece of fire fighting equipment and each call point.

The positions denoted in (h) and (i), if not on the escape route or an open area, shall be at least 5 lux at floor level.

The duration of operation shall be at least 60min.

In order to identify colours on safety signs, the minimum value for the colour rendering index Ra of lamps used in emergency lighting shall be 40.

Disability glare shall be kept low by limiting the luminous intensity of the luminaires within the field of vision.

Additional escape lighting is required at the following locations:

To assist the dispersal of people and to enable final exits to be negotiated safely, the illuminance in the area immediately to such exist shall be that equal to to that immediately inside the exit.

Lift cars intended for conveying people shall be fitted with emergency lighting. The duration of this operation of the lighting shall be at least 3 hours.

Toilets, lobbies and closets of floor area exceeding 8mm2 shall be provided with escape lighting.

Motor generator rooms, control rooms, plant rooms, switch rooms and adjacent to the main control equipment associated with the provision of normal and emergency lighting to the premises.

Pedestrian escape routes from covered and multi-storey car park areas shall be easily identifiable by exit signs and shall be provided with emergency lighting.

6.         System integrity:

Emergency escape lighting shall be activated not only on complete failure of the normal power supply but also in the case of a localized failure if such a  failure would present a hazard, for example, if a single subcircuit on a stairway where to fail..

The illumination provided by an emergency escape lighting system on an escape route should come from more than one luminaire, or supply circuit, so that failure of one luminaire or supply circuit does not plunge the escape route into total darkness or have an adverse affect on the beacon affect of the system.

7.         Emergency lighting system:

All luminaires used shall be of the maintained type fitted with an audible alarm indicating that the betteries need replacement.

8.         Emergency signs:

Emergency signs shall be used to ensure that, in an emergency, an escape route can be easily recognized and followed from any postion within the premises.

Where direct sight of an exit is not possible and if there could be any doubt as to the direction of the appropriate exit, a directional sign shall be provided and be so placed as to guide people to the exit.

Emergency signs shall comply with the appropriate requirements of SABS 1186-3

Emergency signs must be so mounted that the base of the sign is between 2m and 2,5m above floor level.

 

9.         Drawings, Log book and records:

A complete set of 'As Installed drawings' of the emergency lighting installation shall be provided and retained on the premises by a responsible person.

In addition a log book shall be provided and kept in the care of a responsible person appointed by the owner and it shall be readily available for examination by any duly authorized person. The log book shall be used to record at least the following information:

The date of commisioning of the system, including any certificate relating to alterations.

The date of each periodic inspection of test.

The date and brief details of each service, inspection or test carried out.

The dates and brief details of any defects and of the remedial action taken.

The date and brief details of any alteration to the emergency lighting installation.

If an automatic testing device is used, a description of the perfomance of that device.

The date and brief details of annual tests for duration of operation, illumination and system recover.

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