Because it is for LIFE SAFETY.
I dont know read your text book and pay attention in class
Class E fire alarm systems are designed specifically for high-rise office buildings. These systems were put into place after multiple disastrous fires in high-rise buildings. The class E systems are designed to alert all areas of the building to a possible fire.
Set your alarm clock.
A Class-A zone differs from a standard Class-B zone in that it does not use an EOL resistor at the end of the zone. Instead, the zone is looped back into Class-A input terminals on the circuit. Class-A must first be programmed on the panel for it to be used, and it is not available on all panels.
To alert to warn people of an emergency and the need to quickly evacuate. Such as: -Fire -Bomb Alert -Dangerous Chemical Spill -Gas leak -Someone/something dangerous to get away from. Some fire alarm systems are also used as signals for different things. For example, used for class change in schools, the fire alarm is used to sound for a couple of seconds to signal the change over of class. Fire alarm components such as sirens and bells can be used for different applications. Such as train warning for a train barrior closing, Intruder Alarm, Lift Alarm etc.
yes
plz anybody tell me how can i make project report on rain alarm?
The role of a timer in a fire alarm system is to monitor the duration of specific events or actions. For example, the timer can be used to ensure that the alarm horn or strobe light activate for a predetermined amount of time once a fire is detected. This helps to ensure that people are alerted and can safely evacuate the building.
do Australia have class system
The main difference is the thickness of the pipe Compare to A Class pipe B Class pipe thickness is more.Like that Compare to B class pipe C Class pipe thickness is more.
The Indian system that places a person in a certain class at birth is the Caste System. The caste system is a social class system.
Yes there was a class system in the 1600s and even today there is a class system, the government files you into a class for taxes today though.