BS EN 1838:2013
$102.76
Lighting applications. Emergency lighting
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 20 |
This European Standard specifies the luminous requirements for emergency escape lighting and standby lighting systems installed in premises or locations where such systems are required. It is principally applicable to locations where the public or workers have access.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 5 | Foreword |
| 6 | Introduction |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Emergency escape lighting 4.1 General 4.1.1 Installation requirements |
| 9 | 4.1.2 Points of emphasis 4.2 Escape route lighting 4.2.1 For escape routes up to 2 m in width, the horizontal illuminances on the floor along the centre line of an escape route shall be not less than 1 lx. The central band consisting of not less than half of the width of the route shall be illuminated… |
| 10 | 4.2.2 The diversity ‘Ud’ ratio of the minimum to the maximum illuminance (according to EN 12665) shall not be less than 1:40 along the centre line of the escape route. 4.2.3 Disability glare shall be kept low by limiting the luminous intensity of the luminaires within the field of view. |
| 12 | 4.2.4 In order to identify safety colours the minimum value for the colour rendering index Ra from a light source shall be 40. The luminaire shall not substantially subtract from this. 4.2.5 The minimum duration of the illumination of the emergency escape lighting allowed for escape purposes shall be 1 h. 4.2.6 The emergency escape route lighting shall reach 50 % of the required illuminance within 5 s and 100 % required illuminance within 60 s. 4.2.7 Compliance with 4.2.1 to 4.2.4 and 4.2.6 can be checked by measurement or by comparison with authenticated design data. 4.3 Open area lighting 4.3.1 The horizontal illuminance shall be not less than 0,5 lx at the floor level of the empty core area which excludes a border of 0,5 m wide of the perimeter of the area. 4.3.2 The diversity ‘Ud’ ratio of the minimum to the maximum illuminance (according to EN 12665) shall not be less than 1:40. 4.3.3 Disability glare shall be kept low by limiting the luminous intensity of the luminaires within the field of view. These shall not exceed the values in Table 1 within the zone 60º to 90º from the downward vertical at all angles of azimuth (see Fi… 4.3.4 In order to identify safety colours the minimum value for the colour rendering index Ra from a light source shall be 40. The luminaire shall not substantially subtract from this. 4.3.5 The minimum duration allowed for escape purposes shall be 1 h. 4.3.6 The open area lighting shall reach 50 % of the required illuminance within 5 s and 100 % required illuminance within 60 s. 4.3.7 Compliance with 4.3.1 to 4.3.4 and 4.3.6 can be checked by measurement or by comparison with authenticated data. 4.3.8 Open area lighting is required in toilets for disabled people. 4.3.9 Open area lighting/escape route: if emergency escape lighting is required in a room, when this room has no direct access to the escape route in the adjacent fire-compartment, the escape route in between needs to be illuminated as well. 4.4 High risk task area lighting 4.4.1 In areas of high risk the maintained illuminance on the task area plane shall be not less than 10 % of the required maintained illuminance for that task, however, it shall be not less than 15 lx. It shall be free of harmful stroboscopic effects. 4.4.2 The uniformity ‘Uo’ of the high risk task area lighting illuminance shall be not less than 0,1. 4.4.3 Disability glare shall be kept low by limiting luminous intensity of the luminaires within the field of view. These shall not exceed the values in Table 1 within the zone 60º to 90º from the downward vertical at all angles of azimuth. 4.4.4 In order to identify safety colours, the minimum value for the colour rendering index Ra from a light source shall be 40. The luminaire shall not substantially subtract from this. 4.4.5 The minimum duration shall be the period for which the risk exists to people. This should be identified by the employer. |
| 13 | 4.4.6 High risk task area lighting shall provide the full required illuminance permanently or within 0,5 s depending upon application. 4.4.7 Compliance with 4.4.1 to 4.4.4 and 4.4.6 can be checked by measurement or by comparison with authenticated data from a supplier. 4.5 Standby lighting 5 Safety signs 5.1 General 5.2 What safety signs include 5.3 Requirements of safety signs |
| 14 | 5.4 Luminance of safety signs 5.4.1 The luminance of any area of safety colour of the sign shall be at least 2 cd/m2. 5.4.2 The ratio of the maximum to the minimum luminance within either white or the safety colour shall be not greater than 10:1. High variation of adjacent points should be avoided. 5.4.3 The ratio of the luminance Lcontrast colour to the luminance Lsafety colour shall be not less than 5:1 and not greater than 15:1 (see Annex A). 5.4.4 The safety colour and contrast colour shall conform to the requirements of ISO 3864-1 and ISO 3864-4, and shall be measured in accordance with ISO 3864-4. 5.4.5 The minimum duration of illumination of the safety signs shall be 1 h. 5.4.6 Safety signs shall be illuminated to at least 50 % of the required luminance within 5 s and 100 % required luminance within 60 s. 5.4.7 Compliance with 5.4.1 to 5.4.6 can be checked by measurement or by comparison with authenticated data. 5.5 Viewing distance |
| 15 | Annex A (normative) Luminance and illuminance measurements A.1 Luminance measurements of signs A.2 Instrumentation for site measurement |
| 16 | Annex B (informative) A–deviations |
| 18 | Bibliography |
