NEC General Requirements and Definitions 2

Question 1

Under NEC Article 100, what is the definition of 'ampacity'?

Accepted Answer

The current in amperes a conductor can carry continuously under conditions of use without exceeding its temperature rating

Answer

The maximum voltage a conductor can carry continuously

Answer

The resistance of a conductor measured in ohms per foot

Answer

The short-circuit current rating of a protective device

Question 2

What does the NEC term 'listed' mean when applied to equipment?

Accepted Answer

Equipment that has been evaluated by a nationally recognized testing laboratory and found to meet applicable standards

Answer

The equipment appears in a manufacturer's product catalog

Answer

Equipment approved by the local authority having jurisdiction only

Answer

Equipment that has been installed and inspected at least once

Question 3

How does the NEC define a 'branch circuit'?

Accepted Answer

The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)

Answer

The conductors from the utility transformer to the service entrance

Answer

Any wiring method installed inside conduit

Answer

The wiring between two panelboards in the same building

Question 4

According to NEC Article 100, what is a 'raceway'?

Accepted Answer

An enclosed channel designed expressly for holding wires, cables, or busbars

Answer

A cable tray used only in industrial occupancies

Answer

Any metallic conduit approved for outdoor use

Answer

A wireway used exclusively for low-voltage systems

Question 5

Under NEC Section 110.3(B), installed equipment must be used in accordance with:

Accepted Answer

Any listing or labeling instructions included with the equipment

Answer

The NEMA guidelines only

Answer

Any instructions provided by the installing electrician

Answer

The most recent manufacturer's catalog specifications

Question 6

What NEC term describes equipment acceptable to the authority having jurisdiction for a specific installation?

Accepted Answer

Approved

Answer

Listed

Answer

Labeled

Answer

Identified

Question 7

According to NEC Article 100, what distinguishes a 'grounded conductor' from a 'grounding conductor'?

Accepted Answer

A grounded conductor is a current-carrying conductor intentionally connected to ground; a grounding conductor connects equipment to ground for safety

Answer

A grounded conductor carries fault current; a grounding conductor carries load current

Answer

There is no difference — both terms are interchangeable in the NEC

Answer

A grounded conductor is used only in 3-phase systems; a grounding conductor is used in single-phase systems