Definitions, theory & plans: Texas Journeyman Electrician Practice Questions

Which NEC article contains the definitions that apply throughout the Code?

General definitions are collected in Article 100; Article 90 is the introduction and Article 110 holds general installation requirements.

As the NEC uses the term "within sight," one piece of equipment must be visible from the other and no more than how far away?

"Within sight" means visible and not more than 50 ft away. The definition is in Article 100.

What does "ampacity" describe?

Ampacity is a conductor's continuous current-carrying capacity under its conditions of use, limited by its temperature rating (Article 100, in our words).

A load is considered continuous when its maximum current is expected to last for:

A continuous load runs at its maximum current for 3 hours or more (Article 100).

According to the NEC, what is the main purpose of the Code?

Article 90 states that the Code exists for the practical safeguarding of persons and property. It also says it is not a design specification or an instruction manual for untrained persons.

According to the NEC, which installation is outside the scope of the Code?

Section 90.2 lists what is not covered, including utility-controlled installations used for generation, transmission or distribution. Conductors connecting premises to the supply are covered.

According to the NEC, who is responsible for interpreting the Code rules and approving equipment and materials on a job?

Section 90.4 gives the authority having jurisdiction the job of interpreting the rules, approving equipment and materials, and granting special permission.

According to the NEC, how should an informational note be treated?

Section 90.5(C) says informational notes give explanation or references only; they are not requirements and cannot be enforced.

In the 2023 NEC, where are the Code's defined terms located?

The 2023 edition moved the definitions that used to sit in single articles into Article 100, so Article 100 now holds the Code's definitions. Article 90 is the introduction, not a definitions article.

According to the NEC, equipment that can be reached quickly for operation without tools, without climbing over obstacles and without a portable ladder is described as:

Article 100 defines readily accessible as reachable quickly for operation, renewal or inspection without tools (other than keys), climbing over or under obstacles, or using portable ladders.

According to the NEC, a load whose maximum current is expected to continue for how long is a continuous load?

Article 100 defines a continuous load as one where the maximum current is expected to last 3 hours or more.

According to the NEC, the circuit conductors between the final overcurrent device protecting the circuit and the outlets are called:

A branch circuit is the part of the wiring between the final overcurrent device and the outlets. Feeders run between the service (or other source) and that final branch-circuit device.

According to the NEC, conductors that run from the service equipment to the final branch-circuit overcurrent device are called:

Feeders are the conductors between the service equipment, a separately derived system or another power supply source and the final branch-circuit overcurrent device.

According to the NEC, what is the service point?

The service point is the point of connection between the utility's facilities and the premises wiring. The NEC generally covers what is on the premises side.

According to the NEC, equipment included in a list published by an organization acceptable to the AHJ, which evaluates products and states they meet standards, is called:

Listed means the product appears in a list published by a testing organization acceptable to the AHJ. Labeled means it carries that organization's label; approved means acceptable to the AHJ.