2020 NEC Exam Questions Correct
Answers New Update (A Grade)
Where single conductor cables comprising each phase, neutral, or grounded conductor
of a circuit are connected in parallel in a cable tray, the conductors shall be installed
_____, to prevent current imbalance in the paralleled conductors due to inductive
reactance. - Answer- "in groups consisting of not more than one conductor per phase,
neutral, or grounded conductor"
392.20(C)
Emergency lighting systems shall be designed and installed so that the failure of any
individual lighting element, such as the burning out of a lamp, cannot leave in total
darkness any space that requires emergency illumination. - Answer- "True"
700.16(B)
Barriers shall be placed in service equipment such that no uninsulated, ungrounded
service busbar or service _____ is exposed to inadvertent contact by persons or
maintenance equipment while servicing load terminations. - Answer- "terminal"
230.62(C)
Direct-buried conductors or cables can be spliced or tapped without the use of splice
boxes. - Answer- "True"
300.5(E), 110.14(B)
Reinforcing bars for use as a concrete-encased electrode can be bonded together by
the usual steel tie wires or other effective means. - Answer- "True"
250.52(A)(3)(1)
The ampacity of 18 TFFN is _____. - Answer- "6A"
402.5 and Table 402.5
EMT run in unbroken lengths between termination points are permitted to be securely
fastened within _____ft of each outlet box, junction box, device box, cabinet, conduit
body, or other tubing termination where structural members do not readily permit
fastening. - Answer- "5 ft."
358.30(A) Ex 1
Enclosures not over 100 cu in. having threaded entries and not containing a device shall
be considered to be adequately supported where _____ or more conduits are threaded
wrench-tight into the enclosure and each conduit is secured within 3 ft of the enclosure.
- Answer- "two"
314.23(E)
, Receptacles shall not be installed within a zone measured _____ horizontally and 8 ft
vertically from the top of the bathtub rim or shower stall threshold. - Answer- "3 ft."
406.9(C)
_____ at other than dwelling units shall be legibly field marked with the maximum
available fault current, include the date the fault-current calculation was performed, and
be of sufficient durability to withstand the environment involved. - Answer- "Service
equipment"
110.24(A)
The disconnecting means for a sign or outline lighting system shall be permitted to be
located at the point of entry to a sign and the disconnect shall be located at the point the
feeder circuit or branch circuit(s) supplying a sign or outline lighting system enters a
_____. - Answer- "any of these"
600.6(A)(1)
The required heating, air-conditioning, and refrigeration equipment receptacle outlet
shall be located _____ the equipment. - Answer- "on the same level as"
210.63(A)
Electric-discharge and LED luminaires supported independently of the outlet box shall
be connected to the branch circuit through _____. - Answer- Raceways
Type MC, AC, Mi, or NM Cable
Flexible Cord
410.24(A)
Feeder conductors shall be permitted to be sized at 100 percent of the continuous and
noncontinuous load where a portion of the feeder is connected at both its supply and
load ends to separately installed pressure connections. - Answer- "True"
215.2(A)(1)(a) Ex. 2
Appliances such as _____ rated 150V or less to ground and 60A or less, single- or
three-phase, shall be provided with Class A GFCI protection for personnel. - Answer-
Tire Inflation Machine
Vending Machines
Sump pumps
422.5(A)(4), (5), and (6)
Each current-carrying conductor of a paralleled set of conductors shall be counted as a
current-carrying conductor for the purpose of applying the adjustment factors of
310.15(C)(1)). - Answer- "True"
310.15(C)(1)
Listed low-voltage lighting systems or a lighting system assembled from listed parts
shall be permitted to be reconditioned. - Answer- "False"
411.4
Answers New Update (A Grade)
Where single conductor cables comprising each phase, neutral, or grounded conductor
of a circuit are connected in parallel in a cable tray, the conductors shall be installed
_____, to prevent current imbalance in the paralleled conductors due to inductive
reactance. - Answer- "in groups consisting of not more than one conductor per phase,
neutral, or grounded conductor"
392.20(C)
Emergency lighting systems shall be designed and installed so that the failure of any
individual lighting element, such as the burning out of a lamp, cannot leave in total
darkness any space that requires emergency illumination. - Answer- "True"
700.16(B)
Barriers shall be placed in service equipment such that no uninsulated, ungrounded
service busbar or service _____ is exposed to inadvertent contact by persons or
maintenance equipment while servicing load terminations. - Answer- "terminal"
230.62(C)
Direct-buried conductors or cables can be spliced or tapped without the use of splice
boxes. - Answer- "True"
300.5(E), 110.14(B)
Reinforcing bars for use as a concrete-encased electrode can be bonded together by
the usual steel tie wires or other effective means. - Answer- "True"
250.52(A)(3)(1)
The ampacity of 18 TFFN is _____. - Answer- "6A"
402.5 and Table 402.5
EMT run in unbroken lengths between termination points are permitted to be securely
fastened within _____ft of each outlet box, junction box, device box, cabinet, conduit
body, or other tubing termination where structural members do not readily permit
fastening. - Answer- "5 ft."
358.30(A) Ex 1
Enclosures not over 100 cu in. having threaded entries and not containing a device shall
be considered to be adequately supported where _____ or more conduits are threaded
wrench-tight into the enclosure and each conduit is secured within 3 ft of the enclosure.
- Answer- "two"
314.23(E)
, Receptacles shall not be installed within a zone measured _____ horizontally and 8 ft
vertically from the top of the bathtub rim or shower stall threshold. - Answer- "3 ft."
406.9(C)
_____ at other than dwelling units shall be legibly field marked with the maximum
available fault current, include the date the fault-current calculation was performed, and
be of sufficient durability to withstand the environment involved. - Answer- "Service
equipment"
110.24(A)
The disconnecting means for a sign or outline lighting system shall be permitted to be
located at the point of entry to a sign and the disconnect shall be located at the point the
feeder circuit or branch circuit(s) supplying a sign or outline lighting system enters a
_____. - Answer- "any of these"
600.6(A)(1)
The required heating, air-conditioning, and refrigeration equipment receptacle outlet
shall be located _____ the equipment. - Answer- "on the same level as"
210.63(A)
Electric-discharge and LED luminaires supported independently of the outlet box shall
be connected to the branch circuit through _____. - Answer- Raceways
Type MC, AC, Mi, or NM Cable
Flexible Cord
410.24(A)
Feeder conductors shall be permitted to be sized at 100 percent of the continuous and
noncontinuous load where a portion of the feeder is connected at both its supply and
load ends to separately installed pressure connections. - Answer- "True"
215.2(A)(1)(a) Ex. 2
Appliances such as _____ rated 150V or less to ground and 60A or less, single- or
three-phase, shall be provided with Class A GFCI protection for personnel. - Answer-
Tire Inflation Machine
Vending Machines
Sump pumps
422.5(A)(4), (5), and (6)
Each current-carrying conductor of a paralleled set of conductors shall be counted as a
current-carrying conductor for the purpose of applying the adjustment factors of
310.15(C)(1)). - Answer- "True"
310.15(C)(1)
Listed low-voltage lighting systems or a lighting system assembled from listed parts
shall be permitted to be reconditioned. - Answer- "False"
411.4
