COMMERCIAL WIRING CH 1 & 2 EXAM
QUESTIONS WITH VERIFIED
ANSWERS. A+ GRADE 2025/2026.
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. - ANS t
Wet locations are subject to moderate degrees of moisture, but are generally out of the
weather. - ANS f
A short circuit is the unintentional connection of two ungrounded conductors that have a
potential difference between them. - ANS t
The NEC ® is revised and updated every six years. - ANS 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. - ANS f
The basic rule when selecting termination devices is to always use a termination device
identified for the type of conductor material. - ANS t
Explanatory material appears in the NEC ® in Informational Notes. - ANS t
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The minimum headroom of working spaces above electrical equipment in commercial buildings
is 6 1/2'. - ANS f
Electric equipment with ventilating openings shall be installed so that openings are not
obstructed to prevent the free circulation of air. - ANS t
The NEC ® may be used as a design specification by qualified persons. - ANS f
The first ___ chapters of the NEC ® apply generally unless they are modified by the latter
chapters. - ANS 4
Chapter ___ of the NEC ® is independent of the other chapters, and none of the provisions
apply unless they are directly referenced. - ANS 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 ___. - ANS keys
A conductor's ___ is the amount of amperes it can carry continuously without exceeding its
temperature rating. - ANS ampacity
Boxes installed within walls that are required to be taken down to gain access are not
considered ___. - ANS accessible
The word ___ indicates that an NEC ® rule is mandatory. - ANS shall
The two-fold purpose of the NEC ® is to protect ___ from the hazards associated with the use of
electricity. - ANS persons and property
Most voltages referenced in the NEC ® are ___ voltages. - ANS nominal
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
QUESTIONS WITH VERIFIED
ANSWERS. A+ GRADE 2025/2026.
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. - ANS t
Wet locations are subject to moderate degrees of moisture, but are generally out of the
weather. - ANS f
A short circuit is the unintentional connection of two ungrounded conductors that have a
potential difference between them. - ANS t
The NEC ® is revised and updated every six years. - ANS 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. - ANS f
The basic rule when selecting termination devices is to always use a termination device
identified for the type of conductor material. - ANS t
Explanatory material appears in the NEC ® in Informational Notes. - ANS t
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, The minimum headroom of working spaces above electrical equipment in commercial buildings
is 6 1/2'. - ANS f
Electric equipment with ventilating openings shall be installed so that openings are not
obstructed to prevent the free circulation of air. - ANS t
The NEC ® may be used as a design specification by qualified persons. - ANS f
The first ___ chapters of the NEC ® apply generally unless they are modified by the latter
chapters. - ANS 4
Chapter ___ of the NEC ® is independent of the other chapters, and none of the provisions
apply unless they are directly referenced. - ANS 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 ___. - ANS keys
A conductor's ___ is the amount of amperes it can carry continuously without exceeding its
temperature rating. - ANS ampacity
Boxes installed within walls that are required to be taken down to gain access are not
considered ___. - ANS accessible
The word ___ indicates that an NEC ® rule is mandatory. - ANS shall
The two-fold purpose of the NEC ® is to protect ___ from the hazards associated with the use of
electricity. - ANS persons and property
Most voltages referenced in the NEC ® are ___ voltages. - ANS nominal
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
