TFM 12 Fire Alarm Technical questions
and answers
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - **
VERIFIED ANSWERS **✔✔Yes
What does P.L.F.A stand for? - ** VERIFIED ANSWERS **✔✔Power Limited Fire Alarm
What does N.P.L.F.A stand for? - ** VERIFIED ANSWERS **✔✔Non-Power Limited Fire Alarm
What is the difference between P.F.L.A and N.P.F.L.A? - ** VERIFIED ANSWERS **✔✔an
N.P.L.F.A can operate at up to 600v, and the power output isn't limited
a P.L.F.A has the voltage and power limited by a listed power source.
What material must N.P.F.L.A circuit conductors be made from? - ** VERIFIED ANSWERS
**✔✔ONLY solid stranded copper is permitted.
What does A.W.G stand for? - ** VERIFIED ANSWERS **✔✔American Wire Gauge
What size conductors are permitted? - ** VERIFIED ANSWERS **✔✔Size 18 A.W.G and 16
A.W.G are permitted, provided they do not exceed certain capacities.
What is used to protect transformers or other devices supplied from power-supply conductors? - **
VERIFIED ANSWERS **✔✔An over-current device not rated over 20 amperes.
When located within 7 feet of the floor, how shall cables be fastened? - ** VERIFIED ANSWERS
**✔✔Cables shall be fastened in an approved manner at intervals of not more than 18 inches.
, Single conductors shall not be smaller than ___ A.W.G? - ** VERIFIED ANSWERS **✔✔18
Conductors of 28 A.W.G shall only be permitted in which circumstance? - ** VERIFIED
ANSWERS **✔✔Spliced with a connector listed as suitable for 26 to 24 A.W.G
How shall P.F.L.A conductors NOT be installed? - ** VERIFIED ANSWERS **✔✔P.F.L.A
conductors shall not be strapped, taped, or attached to the exterior of any conduit or raceway.
What is Plenum cable? - ** VERIFIED ANSWERS **✔✔Cable that can be installed in ducts,
plenums, or other spaces used for environmental air.
What is a Riser cable? - ** VERIFIED ANSWERS **✔✔Cable to be used in vertical wire runs in
shafts between floors. Not to be used where Plenum cable is required.
It is capable of preventing fire from rising from floor to floor.
What is general purpose cable? - ** VERIFIED ANSWERS **✔✔Cable for general purpose fire
alarm use. Not to be used where plenum cable or riser cable is required.
It is resistant to the spread of fire.
Why 'type' shall plenum cable be? What substitutions are allowed? - ** VERIFIED ANSWERS
**✔✔Power Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
Why 'type' shall riser cable be? What substitutions are allowed? - ** VERIFIED ANSWERS
**✔✔Power Limited Fire Alarm Riser (F.P.L.R) C.M.P, F.P.L.P.
C.M.R can be substituted.
and answers
Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - **
VERIFIED ANSWERS **✔✔Yes
What does P.L.F.A stand for? - ** VERIFIED ANSWERS **✔✔Power Limited Fire Alarm
What does N.P.L.F.A stand for? - ** VERIFIED ANSWERS **✔✔Non-Power Limited Fire Alarm
What is the difference between P.F.L.A and N.P.F.L.A? - ** VERIFIED ANSWERS **✔✔an
N.P.L.F.A can operate at up to 600v, and the power output isn't limited
a P.L.F.A has the voltage and power limited by a listed power source.
What material must N.P.F.L.A circuit conductors be made from? - ** VERIFIED ANSWERS
**✔✔ONLY solid stranded copper is permitted.
What does A.W.G stand for? - ** VERIFIED ANSWERS **✔✔American Wire Gauge
What size conductors are permitted? - ** VERIFIED ANSWERS **✔✔Size 18 A.W.G and 16
A.W.G are permitted, provided they do not exceed certain capacities.
What is used to protect transformers or other devices supplied from power-supply conductors? - **
VERIFIED ANSWERS **✔✔An over-current device not rated over 20 amperes.
When located within 7 feet of the floor, how shall cables be fastened? - ** VERIFIED ANSWERS
**✔✔Cables shall be fastened in an approved manner at intervals of not more than 18 inches.
, Single conductors shall not be smaller than ___ A.W.G? - ** VERIFIED ANSWERS **✔✔18
Conductors of 28 A.W.G shall only be permitted in which circumstance? - ** VERIFIED
ANSWERS **✔✔Spliced with a connector listed as suitable for 26 to 24 A.W.G
How shall P.F.L.A conductors NOT be installed? - ** VERIFIED ANSWERS **✔✔P.F.L.A
conductors shall not be strapped, taped, or attached to the exterior of any conduit or raceway.
What is Plenum cable? - ** VERIFIED ANSWERS **✔✔Cable that can be installed in ducts,
plenums, or other spaces used for environmental air.
What is a Riser cable? - ** VERIFIED ANSWERS **✔✔Cable to be used in vertical wire runs in
shafts between floors. Not to be used where Plenum cable is required.
It is capable of preventing fire from rising from floor to floor.
What is general purpose cable? - ** VERIFIED ANSWERS **✔✔Cable for general purpose fire
alarm use. Not to be used where plenum cable or riser cable is required.
It is resistant to the spread of fire.
Why 'type' shall plenum cable be? What substitutions are allowed? - ** VERIFIED ANSWERS
**✔✔Power Limited Fire Alarm Plenum (F.P.L.P) C.M.P can be substituted.
Why 'type' shall riser cable be? What substitutions are allowed? - ** VERIFIED ANSWERS
**✔✔Power Limited Fire Alarm Riser (F.P.L.R) C.M.P, F.P.L.P.
C.M.R can be substituted.
