Fire Alarm Flashcards
Fire alarm Min and max noise level
75db 118db
L1 type
Automatic detection in every space
L2 type
Automatic detection in escape routes and adjoining rooms with some special areas added
L3 types
Automatic detection in escape route and adjoining rooms
L4 type
Automatic detection in escape routes
L system
Automatic fire detection systems intended for the protection of life
P system
Automatic fire detection systems intended for the protection of property
M system
A manual system that does not use automatic detectors
What is a conventional system
control panel linked to a number of detectors and brake glasses
minimum of two circuits
Wired in radial with end of line resistors
Advantages of conventional system
Cost less to purchase and less programming
Disadvantage of a conventional system
Labour can be expensive as more complex wiring
What is an addressable system?
Differentiate between devices, allowing you to identify which device is at fault
all on the one circuit
Advantages of an addressable system
Saves time on fault finding and quicker to install as single circuit for each zone
Disadvantage of an addressable system
Slow to program
Max area of a fire alarm system
2000sqm
The four different types of detectors 
Photoelectric, optical, combined and heat
List two types of heat detectors
Rate of rise and fix temperature
Areas for main fire alarm control panel
Exit
Fire service access point
Well light area
Fire alarm warning devices
Bell - school
Siren - factory
Horn - factory
Voice system - shopping centre
Purpose of isolators In fire alarm systems
Can isolate faulty sections and not have to turn off a full zone
Max height of fire fighters switch
2.75m
Cable types
MICC
SWA
Fire tough
Pvc in conduit
Purpose of diodes in a sounder circuit
Allows them to operate when voltage is in one direction and not the other
Minimum number of sounder circuits in a fire alarm panel
2
