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A fire alarm system is number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated from smoke detectors, and heat detectors. They may also be activated via Manual fire alarm activation devices such as manual call points or pull stations.
After the fire protection goals are established – usually by referencing the minimum levels of protection mandated by the appropriate model building code, insurance agencies, and other authorities – the fire alarm designer undertakes to detail specific components, arrangements, and interfaces necessary to accomplish these goals. Equipment specifically manufactured for these purposes is selected and standardized installation methods are anticipated during the design. In the United States, NFPA 72, The National Fire Alarm Code is an established and widely used installation standard.In Canada the ULC is the standard for the fire system. The equivalent standard in the United Kingdom is BS 5839

EN 54 is a mandatory standard for Fire detection and fire alarm systems in the European Union, aiming to establish harmonised technical standards against which products in the field should be benchmarked and certified by a qualified testing house known as a Notified Body. Every product for fire alarm systems must achieve the standards laid out in EN 54 in order to properly carry a CE mark, which is in turn required if the product is be delivered and installed in any country of the EU. It is a standard widely used around the world.