Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants
Lawrence Webster Forrest (LWF), Fire Engineering and Fire Risk Management Consultants



Navigation

Client login
Forgotten password
Follow us on Twitter Follow us on Facebook Subscribe to our blog

Lawrence Webster Forrest
Legion House
Lower Road
Kenley
Surrey
CR8 5NH

Tel: +44 (0)20 8668 8663 Fax: +44 (0)20 8668 8583
E-mail: fire@lwf.co.uk

Fire Safety for Healthcare Premises - Emergency & Escape Lighting - Part 28

Posted by LWF: 28/06/2018 13:18

In LWF’s blog series for healthcare professionals, the aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 27 of this series on means of warning and escape in a fire situation, we looked at the additional care that should be taken in areas of intensive care and operating departments. In part 28, LWF talks about the emergency and escape lighting provided and the precautions which should be taken.

In order to protect the most essential electrical services, a hospital will divide its electrical distribution into two categories – essential and non-essential. The essential circuits are protected by a back-up generator which operates when mains electricity fails. The generator will become operational within 15 seconds of a mains failure.

In order for the essential services to be protected, the distribution boards must be housed separately from non-essential services. This may be in a separate location, or they may simply be in separate metal cabinets.  The circuits should also be segregated where possible, but where this isn’t possible, essential service cables must be wired in fire-resistant cabling. 

Electrical distribution systems which serve life safety and fire-fighting applications must always be wired in fire-resistant cable, as per BS 8519:2010 - Selection and installation of fire-resistant power and control cable systems for life safety and fire-fighting applications. Code of practice. (https://shop.bsigroup.com/ProductDetail/?pid=000000000030189451)

Circulation spaces in a hospital department should be subject to separate circuits from the adjacent rooms, so a power failure in one does not affect the other.

While such measures provide a level of protection to essential electrical services, it is possible for failures to happen, such as final circuit, distribution boards or phase failure. In addition, Electrical services supply and distribution (HTM 06-01) - Guidance on the design, installation and testing of all fixed wiring and integral electrical equipment used for electrical services states a recommendation that emergency escape lighting should be operational within half a second of the normal electricity/lighting service interruption. 

As already intimated, a standard generator will not be able to react that quickly, requiring instead a central battery or self-contained batteries solely for emergency escape lighting purpose in order to function. 

Emergency escape lighting must have a minimum duration of three hours and should incorporate fully automatic network testing facilities.

Further guidance on emergency escape lighting can be found in the following documents:

BS 5266-1:2016 - Emergency lighting. Code of practice for the emergency lighting of premises

Electrical services supply and distribution (HTM 06-01) - Guidance on the design, installation and testing of all fixed wiring and integral electrical equipment used for electrical services

LG02 Lighting Guide 02: Hospitals & Health Care Buildings - LG2

In part 29 of this series, LWF will look at means of escape from plant areas. In the meantime, if you have any questions about this blog, or wish to discuss your own project with one of our fire engineers, please contact us.

Lawrence Webster Forrest has been working with their clients for over 25 years to produce innovative and exciting building projects. If you would like further information on how LWF and fire strategies could assist you, please contact Peter Gyere on 020 8668 8663.

While care has been taken to ensure that information contained in LWF's publications is true and correct at the time of publication, changes in circumstances after the time of publication may impact on the accuracy of this information.

Leave a reply

  *

  *

 


CAPTCHA Image

[ Change the image ]


*Required

Subscribe to our fire safety blogs

Bulletins
Email Format
* indicates required

FIRE SAFETY BLOGS

  • Fire Engineering Design and Risk Assessment - Firefighting - Part 14

    In LWFs fire safety engineering blog series for Architects and others in the building design business, we have begun to look at firefighting. In part 13, we began to look at how firefighting can be undertaken by the occupiers of a building if a fire starts. The use of portable fire extinguishers was discussed along with relevant training was discussed. In part 14, the provision of hose reels and the standards involved will be covered.

    Read more...

  • Fire Safety for Healthcare Premises - External Fire Spread - Part 48

    In LWF’s blog series for healthcare professionals, the aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 47 of this series, LWF took a look at the use of sprinkler protection in healthcare venues and in part 48, we begin to discuss the potential for external fire spread and what precautions should be taken to avoid it.It should be borne in mind that we...

    Read more...

  • Facilities Management & Fire Safety - Fire Safety Engineering & the Prescriptive Approach - Part 5

    In LWFs blog series for those who work in facilities management or who have an interest in or responsibility for fire safety, we have been looking at the term ‘Fire Safety Engineering’ and what it involves. In part 4 of the series, we began to look at the differences between fire prevention and safety based on prescriptive codes and fire safety engineering. In part 5, we will continue from that point by looking at the...

    Read more...

  • Fire Engineering Design and Risk Assessment - Firefighting - Part 13

    In LWF’s fire engineering blog series for architects and others in the building design business, we began discussing firefighting. In part 12, an overview of the term and its meaning before looking at the method of firefighting, namely the strategy, tactics and operations of the Fire Service in the UK and equivalent organisations in other parts of the world. In part 13, we look at firefighting by occupiers of a building.Firefighting undertaken by occupiers...

    Read more...

  • Fire Safety for Healthcare Premises - Sprinklers - Part 47

    In LWF’s blog series for healthcare professionals, the aim is to give information on best practice of fire safety in hospitals and other healthcare premises. In part 46 of this series, we looked at the tank arrangement for sprinkler systems and how each pump should be arranged to draw water from either tank, so that any one tank or pump can be isolated. In part 47, we continue from that point on the subject of...

    Read more...

Case Studies

The Wohl Neuroscience Institute - Fire Safety, Strategy & Engineering
Key Facts: Client: King’s Clinical Neuroscience Institute Project Manager: MACE Ltd Designers: Devereux Architects/Allies and Morrison Approximate Size: 7,400m2 Description of the Project:...

Read more..

General Bulletins

Fire - The External Risk
When we consider fire safety, our focus is normally from within, what can we do to prevent the occurrence of fire and how we can limit its damage.  Whilst this is the correct stance to take, we m...

Read more..

Technical Bulletins

Evacuation Modelling - Factor in Human Behaviour
Evacuation of buildings can be analyzed in different ways. Approved Document B (ADB) which provides guidance on meeting the requirements of the England and Wales Building Regulations with regard to fi...

Read more..

Site map | Web development London