Nm Es3J Questions And Answers With Complete Solutions

NM ES3J QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS
NFPA 72 - ANSWERS- fx fx fx


What is the NFPA code that refers to household firefighting equipment?
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22 (NEC 725.179 E) - ANSWERS-
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Type PLTC nonmetallic sheathed shall be a minimum size ___ gauge for class 3 circ
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uits and have an insulation rating of atleast 300 V
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Grounding Connection - ANSWERS- fx fx fx


What is the function of a green wire in a manufactured home?
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2 Feet - ANSWERS-
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What is the minimum required clearance between a receiving antenna and 250 volt li
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ne not insulated?
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20 - ANSWERS- fx fx


What is the maximum number of supervisory switches permitted to be connected to a
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actuate a single transmitter?
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18 (NEC 725.179 H) - ANSWERS-
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According to NEC class 3 circuits are allowed a minimum wire size of what gauge?
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8 Feet
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NEC 250.5.2.5 - ANSWERS- fx fx fx


What is the minimum length of a grounding rod in an application of less than 50 volts?
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Wooden plugs - ANSWERS- fx fx fx


According to the NEC electrical equipment may not be mounted to concrete, cinder bl
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ock, or brick walls with one of these___.
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300
(NEC 800.179) - ANSWERS- fx fx fx


Communication cables shall have a voltage rating of not less than how many volts? fx fx fx fx fx fx fx fx fx fx fx fx fx




Connected fx


(NEC 550.16) - ANSWERS- fx fx fx


In a manufactured home the grounding bus shall be ___ through the green color insul
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ated conductor in the supply cord or the feeder wiring to the service ground in the ser
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vice equipment located adjacent to the mobile home.
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(NFPA 72 18.5.2.1) - ANSWERS- fx fx fx fx


what is the maximum blink rate on a strobe light per second?
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10 foot gas pipe
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, (NEC 250.5.2 A) - ANSWERS-All of the following is acceptable as a ground except?
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1 1/4 inches
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(NEC 300.4 A 1) - ANSWERS-
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What is the minimum clearance to the edge of a wood stud for a wire hole?
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2 Feet
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(NEC 810.13) - ANSWERS-
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The minimum clearance for an antenna to other conductors is?
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2 - ANSWERS-A basic alarm system will have __ power sources
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60 Volts
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(NEC 820.15) - ANSWERS-What is the maximum voltage that coax cable can carry?
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50 Feet (NFPA 72 29.7.3.1) - ANSWERS-
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Heat detectors used within a family unit must be listed as or approved for not less tha
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n ___ spacing?
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3 hours - ANSWERS-
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The NEC classifies Continuous Load as equipment running at a maximum load of __
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____?

Class ll Division 1 fx fx fx


(NEC 500.5 C1) - ANSWERS-
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Determine the class and division for which location in which sufficient quantities of co
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mbustible dust are normally present in the air to produce explosive mixtures.
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On the centerline of a doorway - ANSWERS-
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Given: a smoke detection system is being installed to automatically close a double do
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orway in response to smoke blowing in either direction, the ceiling is smooth. Where
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must the smoke detector be installed?
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Bottom of the beam - ANSWERS- fx fx fx fx fx


On a beam ceiling where the beams are less than 12 inches in depth and spacing is l
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ess than 96 inches where should the smoke detectors be mounted?
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Safe Electrical Installation - ANSWERS-The purpose of NEC is to provide?
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Boxes or Junction Boxes - ANSWERS-
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Where are splices allowed in conductors in surface metal raceways if they do not hav
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e removable covers?
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UF (NEC 340.10) - ANSWERS-What type of wire is used for common direct burial?
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NFPA 72 24.4.1.2.1 - ANSWERS-
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On a voice alarm system what is the minimum number of cycles it has to report an ev
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acuation procedure? fx