Courtesy of www.MikeHolt.com.
All questions and answers are based on the 2023 NEC.
Q1: Kitchen wall countertop and work surface space receptacle outlets shall be installed so that no point along the wall line is more than _____ measured horizontally from a receptacle outlet in that space.
a) 10 in.
b) 12 in.
c) 18 in.
d) 24 in.
Q2: A listed expansion/deflection fitting or other approved means shall be used where a raceway crosses a _____ intended for expansion, contraction, or deflection used in buildings, bridges, parking garages, or other structures.
a) junction box
b) structural joint
c) cable tray
d) strut hanger
Q3: For metal wireways, where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel, the conductors shall be installed in groups consisting of not more than _____ per phase, neutral, or grounded conductor.
a) one conductor
b) two conductors
c) three conductors
d) four conductors
Q4: For crystalline and multicrystalline silicon modules, the maximum DC source circuit voltage is equal to the sum of the PV module rated open-circuit voltage of the _____-connected modules in the PV string circuit corrected for the lowest expected ambient temperature using the correction factors provided in Table 690.7(A).
a) parallel
b) series
c) series-parallel
d) multiwire
Q5: At the time of installation, grounded conductors _____ or larger can be identified by a distinctive white or gray marking at their terminations.
a) 10 AWG
b) 8 AWG
c) 6 AWG
d) 4 AWG
Q6: For grounded systems, electrical equipment, and other electrically conductive material likely to become energized shall be installed in a manner that creates a _____ from any point on the wiring system where a ground fault occurs to the electrical supply source.
a) circuit facilitating the operation of the overcurrent device
b) low-impedance circuit
c) circuit capable of safely carrying the ground-fault current likely to be imposed on it
d) all of the above
Answers:
Q1: d) 24 in.
Per Sec. 210.52(C)(1): "Receptacle outlets shall be installed so that no point along the wall line is more than 24 in. measured horizontally from a receptacle outlet in that space."
Q2: b) structural joint
Section 300.4(H) states, "A listed expansion/deflection fitting or other approved means shall be used where a raceway crosses a structural joint intended for expansion, contraction, or deflection used in buildings, bridges, parking garages, or other structures."
Q3: a) one conductor
Per Sec. 376.20: "Where single conductor cables comprising each phase, neutral, or grounded conductor of an alternating-current circuit are connected in parallel as permitted in Sec. 310.10(G), the conductors shall be installed in groups consisting of not more than one conductor per phase, neutral, or grounded conductor."
Q4: b) series
According to Sec. 690.7(A)(2), "For crystalline and multicrystalline silicon modules, the sum of the PV module-rated open-circuit voltage of the series-connected modules in the PV string circuit corrected for the lowest expected ambient temperature using the correction factors provided in Table 690.7(A)."
Q5: d) 4 AWG
As stated in Sec. 200.6(B)(4), an insulated grounded conductor 4 AWG or larger shall be identified by a distinctive white or gray marking at their terminations at the time of installation.
Q6: d) all of the above
Section 250.4(A)(5) confirms that grounded systems, electrical equipment, and other electrically conductive material likely to become energized shall be installed in a manner that creates a low-impedance circuit facilitating the operation of the overcurrent device and a circuit capable of safely carrying the ground-fault current likely to be imposed on it from any point on the wiring system where a ground fault occurs to the electrical supply source.
These materials are provided by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.
