Fire alarm systems are usually governed by stricter code requirements concerning equipment and its installation. It transmits a fire alarm actuation directly to the local fire service communication center. This system is the fastest and most reliable means of fire department notification. It alerts all occupants of a building in which it is installed when a fire emergency is present. It consists of sensors, control panel, annunciator and related wiring. It is generally divided into four types: non-coded, master-coded, selective-coded and dual-coded. In a non-coded system, an alarm signal is sounded continuously until manually or automatically turned off. In a master-coded system, a common-coded alarm signal is sounded for not less than three rounds.

Fire alarm system is an active fire protection system that detects fire or the effects of fire. This system notifies the occupants & persons in the surrounding area, summons the fire service, and controls all the fire alarm components in a building. It includes alarm initiating devices, alarm notification appliances, control units, fire safety control devices, annunciators, power supplies, and wiring.