There are two primary types of fire alarm systems in use these days and they are known as manual and automatic. Both of these fire alarm systems can be configured to either safeguard lives only or to safeguard both lives and property. Automatic fire alarm systems can be operated in either a conventional or computer addressable configuration.
Manual and Automatic
A manual fire alarm depends on somebody being present in a building and who discovers the fire and can the hand activate the alarm. Devices known as call points are commonly installed near doors and stairwells so as to be easy to activate the alarm system. As you may have seen, this kind of fire alarm is typically used in commercial or industrial buildings where people don’t generally sleep.
An automatic fire alarm uses a connected network of sensing devices that will detect the presence of smoke and then sound an alarm. Also, in addition to sounding the alarm, both manual and automatic alarm systems can be utilised and set to activate sprinkler systems and notify the fire brigade. Professional electrical contractors in Hampshire, have all the knowledge, expertise and trustworthy experience in all such matters and more.
Safeguarding Lives and Containment
Various types of fire alarms have been designed mainly to safeguard the lives of the occupants of a home or building. This kind of fire alarm will sound off an alarm when a fire has been detected but may not activate sprinkler systems or alert the fire brigade. The more complex variants of this kind of system will also close down the ventilation system to halt smoke and toxic fumes from spreading to any other parts of the building.
Automatic fire alarm systems are wired up to a central control panel. The wiring arrangement for these automatic fire alarms is considered to be either conventional or computer related. In a standard conventional configuration, a building is separated into two or more zones and each zone has a various number of different sensing devices connected to the control panel by an electrical cable. The cable goes out from the control panel to the last sensing device in each zone. In such a conventional fire alarm configuration, the activation of one single sensor will trigger alarms and sprinklers for the entire zone.
One Area Addressed
Different to conventional configurations, an addressable fire alarm system makes use of an electrical cable that starts at the control panel and then continues to each sensor until a total circuit is completed and made back to the panel. In this type of configuration, every individual sensing device is assigned an address. Should an individual sensor be activated, the control panel will activate alarms and sprinklers for that zone only based on the sensor’s address. This kind of alarm system configuration eradicates the need for an entire zone to be activated and enables firefighters to define the exact location of the fire.
Fire alarms are definitely an essential part of any buildings well being.