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Fire Alarm TFM12 2023/2024 already graded A+
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Fire Alarm TFM12 2023/2024 already graded A+
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Fire Alarm TFM12What does PLFA stand for? - ANSPower Limited Fire Alarm
What does NPLFA stand for? - ANSNon Power Limited Fire Alarm
What material must NPLFA circuit conductors be made from - ANSOnly solid or
stranded copper is permitted
What is a single station detector? - ANSBattery powered smoke detectors that do not
communicate off premises.
What is a multiple station detector? - ANSMains powered smoke detectors with battery
backup that are linked together, so that if one unit initiates, alarms in all detectors will
sound. They do not communicate off premises.
How frequently must household single and multiple single station detectors be
inspected and tested? - ANSIn accordance with the manufactures recommendations, at
least monthly.
How frequently must household single and multiple station detectors be inspected and
tested? - ANSAt least 3 years, by a qualified service technician.
How frequently must heat detectors be tested? - ANSTwo or more annually, different
detectors must be tested each year, and within 5 years all detectors must have been
tested.
What does "restorable" mean? - ANSThe detector can be "restored" or "reused" after it
has initiated.
What does "non-restorable" mean? - ANSThe detector cannot be 're-used" after it has
initiated an alarm. (Think of a heat detector, which self destructs upon initiating.)
What size conductors are permitted? - ANSSize 18 AWG and 16 AWG are permitted,
provided they do not exceed certain rated ampacities
What is used to protect transformers or other devices supplied from power-supply
conductors? - ANSAn overcurrent device not rated over 20 Amperes
, When located within 7ft of the floor, how shall cables be fastened? - ANSCables shall
be fastened in an approved manner at intervals of not more than 18 inches.
Single conductors shall not be smaller that ___ AWG? - ANS18
Conductors of 26AWG shall only be permitted in which circumstances? - ANSWhere
spliced with a connector listed as suitable for 26 to 24 AWG.
How should PLFA conductors NOT be installed? - ANSPLFA conductors shall not be
strapped, taped or attached to the exterior of any conduit or raceway.
What is Plenum cable? What are its characteristics? - ANSCable that can be installed in
ducts, plenums or other spaces used for environment air. It has adequate fire resistance
and low smoke-producing characteristics.
What is riser cable? What are its characteristics? - ANSCable to be used in vertical wire
runs in shafts or between floors. Not to be used where Plenum cable is required. It is
capable of preventing fire from rising form floor-to-floor.
What is Genral Purpose Cable? What are its characteristics? - ANSCable for general
purpose fire alarm use. Not to be used where Plenum or Riser cable is required. It is
resistant to the spread of fire.
What type shall plenum cable be? What substitutions are allowed? - ANSPower Limited
Fire Alarm Plenum (FPLP) CMP can be substituted.
What type shall riser wire be? What substitutions are permitted? - ANSPower Limited
Fire Alarm Riser (FPLR) CMP,FPLP,CMR can be substituted.
What type shall general purpose wire be? What substitutions are permitted? -
ANSPower Limited Fire Alarm (FPL) CMP,FPLP,CMR,FPLR,CMG, and CM can be
substituted. (All types)
What is the maximum voltage permitted through multi-conductor NPLFA cables? -
ANS150 volts
What is the voltage rating of PLFA cables? - ANSNot less than 300 volts
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