COMMERCIAL ELECTRICAL WIRING|ACTUAL
EXAM QUESTIONS AND 100% CORRECT
ANSWERS|LATEST 2025/2026|GRADED A+
Equipment designed to open circuits under fault conditions shall have an interrupting rating
not less than the available voltage and circuit current at the line side of the equipment. -
ANSWER- t
Wet locations are subject to moderate degrees of moisture, but are generally out of the
weather. - ANSWER- f
A short circuit is the unintentional connection of two ungrounded conductors that have a
potential difference between them. - ANSWER- t
The NEC ® is revised and updated every six years. - ANSWER- f
At least two entrances to electrical rooms shall be provided to give access to the working
space about all electrical equipment rated less than 1200 A. - ANSWER- f
The basic rule when selecting termination devices is to always use a termination device
identified for the type of conductor material. - ANSWER- t
Explanatory material appears in the NEC ® in Informational Notes. - ANSWER- t
The minimum headroom of working spaces above electrical equipment in commercial
buildings is 6 1/2'. - ANSWER- f
Electric equipment with ventilating openings shall be installed so that openings are not
obstructed to prevent the free circulation of air. - ANSWER- t
The NEC ® may be used as a design specification by qualified persons. - ANSWER- f
, The first ___ chapters of the NEC ® apply generally unless they are modified by the latter
chapters. - ANSWER- 4
Chapter ___ of the NEC ® is independent of the other chapters, and none of the provisions
apply unless they are directly referenced. - ANSWER- 8
Equipment that is required to be readily accessible shall be capable of being reached quickly
without the use of tools, with an exception for ___. - ANSWER- keys
A conductor's ___ is the amount of amperes it can carry continuously without exceeding its
temperature rating. - ANSWER- ampacity
Boxes installed within walls that are required to be taken down to gain access are not
considered ___. - ANSWER- accessible
The word ___ indicates that an NEC ® rule is mandatory. - ANSWER- shall
The two-fold purpose of the NEC ® is to protect ___ from the hazards associated with the
use of electricity. - ANSWER- persons and property
Most voltages referenced in the NEC ® are ___ voltages. - ANSWER- nominal
Interpretations and approval of equipment are granted by the ___. - ANSWER- ahj
The AHJ can permit alternate ___ for installation, if they believe the installation is equally
effective at meeting the intended objective. - ANSWER- methods
Although installed in conformance with the NEC ®, all electrical installations may not be
adequate for ___ expansion of electrical use. - ANSWER- future
EXAM QUESTIONS AND 100% CORRECT
ANSWERS|LATEST 2025/2026|GRADED A+
Equipment designed to open circuits under fault conditions shall have an interrupting rating
not less than the available voltage and circuit current at the line side of the equipment. -
ANSWER- t
Wet locations are subject to moderate degrees of moisture, but are generally out of the
weather. - ANSWER- f
A short circuit is the unintentional connection of two ungrounded conductors that have a
potential difference between them. - ANSWER- t
The NEC ® is revised and updated every six years. - ANSWER- f
At least two entrances to electrical rooms shall be provided to give access to the working
space about all electrical equipment rated less than 1200 A. - ANSWER- f
The basic rule when selecting termination devices is to always use a termination device
identified for the type of conductor material. - ANSWER- t
Explanatory material appears in the NEC ® in Informational Notes. - ANSWER- t
The minimum headroom of working spaces above electrical equipment in commercial
buildings is 6 1/2'. - ANSWER- f
Electric equipment with ventilating openings shall be installed so that openings are not
obstructed to prevent the free circulation of air. - ANSWER- t
The NEC ® may be used as a design specification by qualified persons. - ANSWER- f
, The first ___ chapters of the NEC ® apply generally unless they are modified by the latter
chapters. - ANSWER- 4
Chapter ___ of the NEC ® is independent of the other chapters, and none of the provisions
apply unless they are directly referenced. - ANSWER- 8
Equipment that is required to be readily accessible shall be capable of being reached quickly
without the use of tools, with an exception for ___. - ANSWER- keys
A conductor's ___ is the amount of amperes it can carry continuously without exceeding its
temperature rating. - ANSWER- ampacity
Boxes installed within walls that are required to be taken down to gain access are not
considered ___. - ANSWER- accessible
The word ___ indicates that an NEC ® rule is mandatory. - ANSWER- shall
The two-fold purpose of the NEC ® is to protect ___ from the hazards associated with the
use of electricity. - ANSWER- persons and property
Most voltages referenced in the NEC ® are ___ voltages. - ANSWER- nominal
Interpretations and approval of equipment are granted by the ___. - ANSWER- ahj
The AHJ can permit alternate ___ for installation, if they believe the installation is equally
effective at meeting the intended objective. - ANSWER- methods
Although installed in conformance with the NEC ®, all electrical installations may not be
adequate for ___ expansion of electrical use. - ANSWER- future
