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L1​

The L1 system is installed throughout all areas of the building.​

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L2​

The L2 system is installed only in defined parts of the building.​
The L2 system is in the main the same as a L3 type system but provides early warning of a fire in specified areas of high risk or fire hazards.​

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Standard

BS 5839-1 - Fire detection & fire alarm systems for building.​

(COP for system design, installation, commissioning​ & maintenance).​

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Unsure if a premises needs automatic detection or what category should be installed?

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Unsure if a premises needs automatic detection or what category should be installed?

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refer to: BS 5588 Fire precautions in the design, construction and use of​
buildings. Managing fire safety

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 EN54   Fire detection and fire alarm systems 

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 EN54   Fire detection and fire alarm systems 

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​

EN54-25 2008 Components using radio links and system requirements​

EN54-2,4,5,7,11 etc Requirements for separate components of a fire system

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Code of Practice for system design, installation, commissioning and maintenance​

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L4​

The L4 system is installed on escape routes such as corridors, stairways and circulation areas.​

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L5​

A L5 system comprises of detectors in specific areas to satisfy a fire safety objective.​

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P type automatic detection systems are designed for the protection of property and are sub-divided as follows:​

P1​

A P1 system is one that is installed in all areas of the building and is designed to give early warning of a fire thus reducing the amount of time between the ignition of the fire and the arrival of the fire service.​

P2​

The P2 type system is installed only in where there is a high risk of fire that would be a risk to the property of business continuity.​

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​​

Section 1: General​

Section 2: Design Consideration​

Section 3: Limitation of False Alarms​

Section 4: Installation​

Section 5: Commissioning & Handover​

Section 6: Maintenance​

Section 7: User Responsibilities​

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BS 5839-8 -  Fire detection & fire alarm systems for building.​

(COP for the design, installation and maintenance of  Voice Alarm Systems)

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L3​

The L3 system is intended to provide an early warning of fire, to enable the occupants to escape before any of the escape routes become impassable.​

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LPS1257  Loss Prevention Standard​

Requirements and testing procedures for Radio Linked Fire Detection and Fire Alarm Equipment​

Superseded by EN 54: 25 2008​