Exam (elaborations)
Residential Electrical Test Questions and Answers 2024
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Residential Electrical Test Questions and Answers
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Residential Electrical Test Questionsand Answers
the NEC is the basic standard; local and state codes are to be considered also. -
Answer -What code sets standards for electrical installation work?
The local electrical inspection authority - Answer -what authority enforces the
requirements set by the NEC?
Minimum - Answer -does the NEC provide minimum or maximum standards?
When shown on an electrical product or in a certification mark, it means the product is
Listed by Underwriters Laboratories. It also means that the product met applicable
safety standards when it left the manufacturer's plant. - Answer -what do the letters "UL"
signify?
NEC 110.3(B) - Answer -what section of the NEC states that all listed or labeled
equipment shall be installed or used in accordance with any instructions included in the
listing or labeling?
Must - Answer -when the word "shall" appears in an NEC referance, it means (must) or
(may) be done.
The NEC states in 90.1(A) that "The purpose of this Code is the practical safeguarding
of persons and property from hazards arising from the use of electricity."* - Answer -
What is the purpose of the NEC?
No. The NEC states in 90.1(B) that "This Code contains provisions that are considered
necessary for safety. Compliance therewith and proper maintenance results in an
installation that is essentially free from hazard but not necessarily efficient, convenient,
or adequate for good service or future expansion of electrical use."* - Answer -does
compliance with the NEC always result in an electrical installation that is adequate, safe
and efficient? why?
Underwriters Laboratories (UL) and Intertek Testing Services (ETL listing mark). -
Answer -Name two nationally recognized testing labs
, No. Approval is up to the Authority Having Jurisdiction. See NEC 90.4 and 110.2. -
Answer -do Underwriters laboratories (UL) and the other recognized testing labs
"approve" products?
They test the products for conformance to applicable safety standards. - Answer -what
do the testing laboratories do?
Informative Annex J includes information that is intended to assist the users of the Code
in properly considering the various electrical design constraints of other building
systems and are part of the 2010 ADA Standards for Accessible Design. The
Informative Annex is not enforceable. The basic NEC rules still apply. Local
communities, counties, states, and/or other govern-mental bodies might have
requirements. Check with your local inspection authority. Ask them if there are any
requirements or suggestions that you might need to fo - Answer -does the NEC make
suggestions about how to wire a house that will be occupied by handicapped persons?
OSHA - Answer -What federal organization dictates requirements for work-related
safety issues?
Turn off the power on the circuit you are working on, tag it, and lock the disconnect in
the OFF position. - Answer -what can you do to reduce or eliminate the possibility of
receiving an electric shock when working on electrical circuits?
The NEC defines a qualified person as "One who has skills and knowledge related to
the construction and operation of the electrical equipment and installations and has
received safety training to recognize and avoid the hazards involved."* (70E) - Answer -
what is the NEC definition of a "qualified person"
Not necessarily, usually depending on the voltage. - Answer -are low-voltage systems
totally safe?
NFPA 70E - Answer -what NFPA standard specifically covers safety in the workplace?
Personal Protective Equipment. - Answer -What does PPE stand for?
An arc flash is the tremendous explosion that happens when a short circuit or ground
fault occurs on an electrical system that is capable of delivering high fault current. -
Answer -briefly explain an arc flash
Apprenticeship programs, Consumer Product Safety Commission, National Safety
Council, Occupational Safety & Health Act, National Fire Protection Association, and the
American Heart Association - Answer -where might you obtain information about on the
job safety and safety training?
No - Answer -is it a safe practice to use a step ladder in which the spreaders have not
been fully locked?
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