TFM 12 Fire Alarm Technical | 90 Questions with 100% Correct Answers | Latest Update | Verified

TFM 12 Fire Alarm Technical | 90 Questions with 100% Correct Answers | Latest Update | Verified Does a fire hood system and a kitchen need to be monitored by the fire alarm system? - Yes What does P.L.F.A stand for? - Power Limited Fire Alarm What does N.P.L.F.A stand for? - Non-Power Limited Fire Alarm What is the difference between P.F.L.A and N.P.F.L.A? - 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? - ONLY solid stranded copper is permitted. What does A.W.G stand for? - American Wire Gauge What size conductors are permitted? - 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? - An over-current device not rated over 20 amperes. When located within 7 feet of the floor, how shall cables be fastened? - 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? - 18 Conductors of 28 A.W.G shall only be permitted in which circumstance? - Spliced with a connector listed as suitable for 26 to 24 A.W.G How shall P.F.L.A conductors NOT be installed? - P.F.L.A conductors shall not be strapped, taped, or attached to the exterior of any conduit or raceway. What is Plenum cable? - Cable that can be installed in ducts, plenums, or other spaces used for environmental air. What is a Riser cable? - 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