Exam (elaborations)
National Electric Code NEC - Article 310 (1)
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- Management 310 KU
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- Management 310 KU
National Electric Code NEC - Article 310 (1)
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National Electric Code NEC - Article 310(a) True - Reference NEC 2017 310.10 - ANS-Conductors shall be permitted for use in any of
the wiring methods recognized in Chapter 3 and as permitted in the NEC.
(a) True
(b) False
(d) 1/0 - Reference NEC 2017 310.10 (H) - ANS-In general, the minimum size conductor
permitted for use in parallel installations is ______ AWG.
(a) 10
(b) 4
(c) 1
(d) 1/0
(d) all of these - Reference NEC 2017 310.10 (H)(2) - ANS-Parallel conductors shall have the
same ______ .
(a) length
(b) material
(c) size in circular mil area
(d) all of these
(a) True - Reference NEC 2017 310.10 (H)(3) - ANS-Where conductors in parallel are run in
separate raceways, the raceways shall have the same electrical characteristics
(a) True
(b) False
(a) True - Reference NEC 2017 310.15 (A)(3) - ANS-No conductor shall be used where its
operating temperature exceeds that designated for the type of insulated conductor involved.
(a) True
(b) False
(b) temperature - Reference NEC 2017 310.15 (A)(3) - ANS-The ______ rating of a conductor is
the maximum temperature, at any location along its length, which the conductor can withstand
over a prolonged period of time without serious degradation.
(a) ambient
(b) temperature
, (c) maximum withstand
(d) short-circuit
(c) heat - Reference NEC 2017 310.15 (A)(3) - ANS-There are four principal determinants of
conductor operating temperature, one of which is ____ generated internally in the conductor as
the result of load current flow, including fundamental and harmonic currents.
(a) friction
(b) magnetism
(c) heat
(d) none of these
(b) voltage drop - Reference NEC 2017 310.15 (A)(1) - ANS-The ampacities listed in 310.15 do
not take ____ into consideration.
(a) continuous loads
(b) voltage drop
(c) insulation
(d) wet locations
(a) 10, 10 - Reference NEC 2017 310.15 (A)(2) - ANS-The ampacity of a conductor can be
different along the length of the conductor. The higher ampacity can be used beyond the point of
transition for a a distance of no more than ____ ft, or no more than ____ percent of the circuit
length figured at the higher ampacity, whichever is less.
(a) 10, 10
(b) 10, 20
(c) 15, 15
(d) 20, 10
(a) True - Reference NEC 2017 310.15 (B)(2) - ANS-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(B)(3)(a)
(a) True
(b) False
(c) 80 - Reference NEC 2017 310.15 (B)(3) - ANS-Where six current-carrying conductors are
run in the same conduit or cable, the ampacity of each conductor shall be adjusted by a factor of
____ percent.
(a) 40
(b) 60
(c) 80
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