Learn About Fire Alarm SystemsCodes, rules, and laws show what's needed to detect fire and what's needed to tell people about the fire. They don't show how a fire alarm system works.
However, with any fire alarm system, between the Detect Fire and the Tell People is a whole building full of hidden wire and controls. This is what has to be learned about and understood by those people designing, installing, servicing, and testing fire alarm systems.
Conventional Fire Alarm Systems
Codes and Rules tell you what you should have, but how does a Conventional Fire Alarm System Work?
"Make It Work - Conventional Fire Alarms" provides technical answers to the questions:
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/