NEC General Requirements and Definitions Questions and Answers

Question 1

According to NEC Article 90, what is the primary purpose of the National Electrical Code?

Accepted Answer

The practical safeguarding of persons and property from hazards arising from the use of electricity.

Answer

To serve as a design specification and instruction manual for electricians.

Answer

To guarantee the efficiency, convenience, and adequacy of electrical installations.

Answer

To provide a minimum standard for electrical installations to ensure they are free from hazards.

Question 2

An electrical panel is located in a closet, but the door to the closet is locked, and a key is required for access. According to the definition in Article 100, is the equipment inside considered 'Readily Accessible'?

Accepted Answer

Yes, because the use of a key does not prevent the equipment from being considered readily accessible.

Answer

No, because a tool (the key) is required to gain access.

Answer

Yes, as long as the key is available to authorized personnel.

Answer

No, because equipment in a closet is never considered readily accessible.

Question 3

Which of the following best defines a 'Qualified Person' as described in NEC Article 100?

Accepted Answer

One who has skills and knowledge related to the construction and operation of electrical equipment and installations and has received safety training to recognize and avoid the hazards involved.

Answer

Any individual who has completed a certified apprenticeship program.

Answer

A person with a recognized degree or professional standing in an electrical field.

Answer

An individual who is authorized by the property owner to perform electrical work.

Question 4

A new piece of electrical equipment is being installed. According to NEC 110.3(B), what is the installer's responsibility regarding the manufacturer's instructions included with the listed and labeled equipment?

Accepted Answer

The equipment must be installed and used in accordance with any instructions included in the listing or labeling.

Answer

The instructions are only recommendations and can be disregarded if the installer has a better method.

Answer

The instructions only need to be followed if the Authority Having Jurisdiction (AHJ) specifically requests it.

Answer

Only the instructions related to the voltage rating must be followed.

Question 5

In a commercial building, an electrician needs to install new conductors in a damp location. According to NEC Article 110, which of the following is required?

Accepted Answer

The conductors must be specifically identified for use in damp locations.

Answer

The conductors can be any standard type as long as they are in a sealed conduit.

Answer

An overcurrent protection device with a lower rating must be used.

Answer

The installation must be inspected by the utility company before energizing.

Question 6

Which of the following types of equipment is specifically NOT permitted to be reconditioned according to the NEC?

Accepted Answer

Molded-case circuit breakers

Answer

Panelboards

Answer

Transformers

Answer

Motor control centers