Exam (elaborations)
COMMERCIAL WIRING CH 1 & 2 QUESTONS AND ANSWERS WITH SOLUTIONS 2024
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COMMERCIAL WIRING CH 1 & 2 QUESTONS AND ANSWERS WITH SOLUTIONS 2024
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COMMERCIAL WIRING CH 1 & 2QUESTONS AND ANSWERS WITH
SOLUTIONS 2024
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
The NEC ® is not intended to be used as a(n) ___ specification. - ANSWER design
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