Fire Alarm Systems
Articles By Douglas Krantz
When a fire starts burning and others need to be warned, people shout "Fire!"
When people are asleep or nobody is around, a fire alarm system does the shouting automatically.
If the building is too big, the fire alarm system shouts when one person can't reach everyone.
A fire alarm system shouts "Fire!" when just one person can't.
When a fire starts burning, three objectives are essential to reduce the loss:
- Detection -- a person sees the fire
- Announcement -- that person shouts fire!
- Action -- others flee danger, or others come running to help stop the fire
Fire Alarm System
- Detection -- The fire alarm system activates when detecting a fire, or a person seeing a fire activates the fire alarm system
- Announcement -- The fire alarm system sounds the evacuation in that and other areas, and also calls the fire department through off site monitoring
- Action -- Those hearing the fire alarm evacuate the building, while the fire department comes to fight the fire
Can't do it Alone
The fire alarm system requires people to make it work. If you're one of those people that operate, design, install, or maintain fire alarm systems, check out these articles.
Douglas Krantz | Describing How It Works
I'll Send You the
On this website, most references to electrical flow are to the movement of electrons.
Here, electron movement is generally used because it is the electrons that are actually moving. To explain the effects of magnetic forces, the movement of electrons is best.
Conventional current flow, positive charges that appear to be moving in the circuit, will be specified when it is used. The positive electrical forces are not actually moving -- as the electrons are coming and going on an atom, the electrical forces are just loosing or gaining strength. The forces appear to be moving from one atom to the next, but the percieved movement is actually just a result of electron movement. This perceived movement is traveling at a consistent speed, usually around two-thirds the speed of light. To explain the effects of electrostatic forces, the movement of positive charges (conventional current) is best.
See the explanation on which way electricity flows at www.douglaskrantz.com/