Further guidance on fire detection and warning systems

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To reduce the risk of malicious or accidental operation which may promote panic in the event of an actuation by a member of the public (e.g. in a pub), as as part of your management plan you should consider alternative

arrangements such as:

• locating the majority of manual call points in staff areas;

• the guarding of manual call points; and

• a delayed alarm for investigation purposes before any general alarm is given.

Areas that are regularly checked and patrolled may have less need for a manual call point.

For these approaches to be effective, robust management procedures should be in place around a staff alarm system (see Section 2.3 below).

2.2 Automatic fire detection

Automatic fire detection may be needed for a number of reasons. These can include:

• if you have areas where people are isolated or remote and could become trapped by a fire because they are unaware of its development, such as lone workers;

• if you have areas where a fire can develop unobserved (e.g. storerooms);

• as a compensating feature, e.g. for inadequate structural fire protection, in dead-ends or where there are extended travel distances; and

• where smoke control and ventilation systems are controlled by the automatic fire-detection system.

If you have an automatic fire detection system, the system should:

• be designed to accommodate the emergency evacuation procedure;

• give an automatic indication of the fire warning and its location;

• be maintained and tested by a competent person; and

• communicate with a central control room (if you have one).

New automatic fire detection systems should be designed and installed by a competent person. Further guidance is given in BS 5839-1¹⁶ or a more recent standard where applicable.

2.3 Staff alarms

In some premises the actuation of the fire warning system should trigger the immediate and total evacuation of the building. However, in some premises this may not be necessary as alternative arrangements may be in place.

For example, the initial alert signal could be given only to certain staff, who then carry out pre-arranged actions to help others to evacuate more easily. This will require able, fully-trained staff to be available at all times, particularly to alert disabled people to give them the maximum time to escape. This approach should form part of your emergency plan.

Where the public address system is part of the fire warning system it should be connected to an auxiliary power source to ensure the continued use of the system in the event of fire or other emergency.

Whichever warning or detection systems are in place, however, if a fire occurs the fire and rescue service should always be called immediately.

2.4 Reducing false alarms

False alarms from automatic fire detection systems are a major problem and result in many unwanted calls to the fire and rescue service every year. Guidance on reducing false alarms has been published by ODPM/CFOA/BFPSA.¹⁵ If there are excessive false alarms in your premises, people may become complacent and not respond correctly to a warning of a real fire. In such circumstances, you may be failing to comply with fire safety law. All false alarms should be investigated to identify the cause of the problem and remedial action taken.

Further detailed guidance on reducing false alarms is available in BS 5839-1.¹⁶

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2.5 Testing and maintenance

Your fire warning and/or detection system should be supervised by a named responsible person, who has been given enough authority and training to manage all aspects of the routine testing and scrutiny of the system.

The control and indicating equipment should be checked at least every 24 hours to ensure there are no specific faults. All types of fire warning systems should be tested once a week. For electrical systems a manual call point should be activated (using a different call point for each successive test), usually by inserting a dedicated test key (see Figure 18).

This will check that the control equipment is capable of receiving a signal and in turn, activating the warning alarms. Manual call points may be numbered to ensure they are sequentially tested.

It is good practice to test the alarm at the same time each week, but additional tests may be required to ensure that staff or people present outside normal working hours are given the opportunity to hear the alarm.

Where systems are connected to a central monitoring station arrangements should be made prior to testing to avoid unwanted false alarms.

Six-monthly servicing and preventive maintenance should be carried out by a competent person with specialist knowledge of fire warning and automatic detection systems. This task is normally fulfilled by entering into a service contract with a specialist fire alarm company.

It is good practice to record all tests, false alarms and any maintenance carried out.

Further guidance on testing and maintenance of fire warning systems can be found in British Standard 5839-1.¹⁶

2.6 Guaranteed power supply

If your fire risk assessment concludes that an electrical fire-warning system is necessary, then the Health and Safety (Safety Signs and Signals) Regulations 1996⁵ requires it to have a back-up power supply.

Whatever back-up system is used, it should normally be capable of operating the fire-warning and detection system for a minimum period of 24 hours and sounding the alarm signal in all areas for 30 minutes.

2.7 New and altered systems

Guidance on the design and installation of new systems and those undergoing substantial alterations is given in BS 5839-1.¹⁶ If you are unsure that your existing system is adequate you will need to consult a competent person.

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Figure 18: Using a test key

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All premises should be provided with appropriate firefighting eqipment. For the majority of premises, first aid firefighting equipment should be sufficient.

You have responsibility for the provision of appropriate firefighting equipment. It is also your responsibility to check that all firefighting equipment is in the correct position and in satisfactory order before the premises are used.

Appropriate staff should be trained in the use of all such equipment.

3.1 Portable firefighting equipment

Fire extinguishers provided should be appropriate to the specific risks found in your premises in accordance with Table 1. This table also shows the different classes of fire, according to what is burning.

At events such as exhibitions you must take care that temporary stands or exhibits do not obscure extinguishers or manual call points.

Number and type of extinguishers Typically for the Class A fire risk, the

provision of one water-based extinguisher for approximately every 200m² of floor space, with a minimum of two extinguishers per floor, will normally be adequate.

Where it is determined that there are additionally other classes of fire risk, the appropriate type, number and size of extinguisher should be provided. Further information is available in BS 5306-8.¹⁸

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Section 3 Further guidance on