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2020 NEC Final exam 80 questions exam with correct answers

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2020 NEC Final exam 80 questions exam with correct answers

Institution
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NEC.
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Uploaded on
December 6, 2025
Number of pages
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Written in
2025/2026
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2020 NEC Final exam 80 questions exam ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




with correct answers ||\\||\\ ||\\||\\




406.6(D)A Universal Serial Bus flush device cover plate that additionally provides a night light ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




and / or ___________ output connector(s ) shall be listed.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) one ||\\||\\ ||\\||\\




( ||\\||\\ b ) two ||\\||\\ ||\\||\\




( ||\\||\\ c ) Class I ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) Class II ||\\||\\ ||\\||\\ ||\\||\\




Class II ||\\||\\




406.6(D)

RV feeders from 208Y / 120 volt , 3ø systems shall be permitted to include ___________ .
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




I. one equipment grounding conductor
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




II. one grounded conductor
||\\||\\ ||\\||\\ ||\\||\\




III. three grounded conductors||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) I only ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ b ) II only ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ c ) I and II only
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) I, II, and III
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




I and II only
||\\||\\ ||\\||\\ ||\\||\\




551.72(B)

The conductors supplying the supplementary overcurrent protective devices for fixed
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




industrial process heating equipment shall be considered __________ conductors . ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( a ) supplementary
||\\||\\ ||\\||\\ ||\\||\\

,( b ) tap ||\\||\\ ||\\||\\ ||\\||\\




( c ) by - pass
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( d ) branch circuit
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




branch circuit ||\\||\\




425.22(D)

392.10(E)

In airports where maintenance and supervision conditions ensure that only qualified persons
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




can access , install , or service the cable , airfield lighting cable used in series circuits that are
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




rated up to __________ volts and are powered by constant current regulators shall be
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




permitted to be installed in cable trays . ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( a ) 1000 ||\\||\\ ||\\||\\ ||\\||\\




( b ) 2500 ||\\||\\ ||\\||\\ ||\\||\\




( c ) 3000 ||\\||\\ ||\\||\\ ||\\||\\




( d ) 5000 ||\\||\\ ||\\||\\ ||\\||\\




5,000 volts ||\\||\\




392.10(E)

424.101(A)

Low voltage heating power unit shall be an isolating type with a rated output NOT exceeding
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




__________ volts peak ac.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) 30 ||\\||\\ ||\\||\\




( ||\\||\\ b ) 42.4 ||\\||\\ ||\\||\\




( ||\\||\\ c ) 60 ||\\||\\ ||\\||\\




( ||\\||\\ d ) 25 ||\\||\\ ||\\||\\




42.4V peak AC ||\\||\\ ||\\||\\




424.101(A)

210.8(C)

GFCI protection shall be provided for lighting outlets NOT exceeding _________ volts
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




installed in crawl spaces ||\\||\\ ||\\||\\ ||\\||\\

,( ||\\||\\ a ) 30 ||\\||\\ ||\\||\\




( ||\\||\\ b ) 50 ||\\||\\ ||\\||\\




( ||\\||\\ c ) 90 ||\\||\\ ||\\||\\




( ||\\||\\ d ) 120 ||\\||\\ ||\\||\\




120V

210.8(C)

All audio equipment operating at greater than the low - voltage contact limit and located
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




within __________ from the inside walls of a storable or portable immersion pool shall be
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




grounded and shall be protected by a GFCI. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a)6' ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ b)8' ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ c ) 10 '
||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) 12 ' ||\\||\\ ||\\||\\ ||\\||\\




6'

680.35(D)

Locations in which easily ignitable combustible fibers are stored or handled other than in the ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




process of manufacturing are designated as __________ .
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) nonhazardous
||\\||\\ ||\\||\\




( ||\\||\\ b ) Class III , Division 2
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ c ) Class III , Division 1
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) Class II , Division 2
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




Class III , Division 2 ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




500.5(D)(2)

A disconnecting means is required to disconnect the __________ from the circuit.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) motor and controller
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ b ) motor ||\\||\\ ||\\||\\




( ||\\||\\ c ) motor or controller
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) controller
||\\||\\ ||\\||\\

, motor and controller ||\\||\\ ||\\||\\




430.101

Circuits and equipment operating at less than 50 volts must use receptacles that are rated at
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




NOT less than __________ amps .
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




(a ) 15 ||\\||\\ ||\\||\\




( b ) 20 ||\\||\\ ||\\||\\ ||\\||\\




( c ) 25 ||\\||\\ ||\\||\\ ||\\||\\




( d ) none of these
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




15 amps ||\\||\\




720.6

Most incidents and injuries are initiated by __________ . ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) equipment failures
||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ b ) people ||\\||\\ ||\\||\\




( ||\\||\\ c ) incomplete procedures
||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) inadequate regulation enforcement
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




people

NFPA 70E ||\\||\\




Which of the following organizations would maintain records of tested electrical equipment ?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ a ) Underwriters ' Laboratories
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ b ) National Fire Protection Association
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ c ) National Electrical Contractors Association
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




( ||\\||\\ d ) IEEE ||\\||\\ ||\\||\\




UL

General Knowledge ||\\||\\




Fastening of unbroken lengths of EMT conduit can be increased to a distance of __________ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




from the termination point where the structural members do NOT readily permit fastening
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\




within 3 feet ||\\||\\ ||\\||\\
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