Lesson 2 Article 100-1 QUIZ

6 mA or higher

A Class A GFCI protection device is designed to trip when the current to ground is _____ or higher.

open

A circuit breaker is a device designed to _____ the circuit automatically on a predetermined overcurrent without damage to itself when properly applied within its rating.

ground-fault circuit interrupter

A device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a Class A device, is a(n) "______."

conduit body

A separate portion of a raceway system that provides access through a removable cover(s) to the interior of the system, defines the term _____.

disconnecting means

A(n) _____ is a device, or group of devices, which the conductors of a circuit can be disconnected from their source of supply.

arcing

An arc-fault circuit interrupter is a device intended to de-energize the circuit when it recognizes characteristics unique to _____.

generally to all electrical installations 90.3

Chapters 1 through 4 of the NEC apply _____.

A ground fault at 277 VAC generates 5 times as much heat (fire hazard) verse 120 VAC. The ring knockouts are not reliable and can't be counted on during a 277 volt ground fault. In order to reduce the resistance and lower the heat a bonding jumper is required in NEC Article 250.97.

In the Mike Holt video Bonding 480/277 VAC an equipment bonding jumper is discussed for ring knockouts. Why is the bonding jumper required?

Shall and shall not 90.5(A)

In the NEC, the words "_______" indicate a mandatory requirement.

building

The NEC defines a(n) "_____" as a structure that stands alone or that is cut off from adjoining structures by fire walls or fire barriers, with all openings therin protected by approved fire doors.

authority having jurisdiction 90.4

The _____ has the responsibility for deciding on the approval of equipment and materials.

grounding conductor, equipment

The installed conductive path(s) that is part of an effective ground-fault current path and connects normally noncurrent-carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both, is known as a(n) ______.

ampacity

The maximum current, in amperes, that a conductor can carry continuously, where the temperature will not be raised in excess of the conductor's insulation temperature rating is called its "______."

selective coordination

The selection and installation of overcurrent devices so that an overcurrent condition will be localized and restrict outages to the circuit or equipment affected, is called "_____."

Ground

The word "Earth" best describes what NEC term?

shall be permitted 90.5(B)

When the Code uses "______," it means the identified actions are allowed but not required, and they may be options or alternative methods.

Inverse time

______ is a term indicating that there is an intentional delay in the tripping action of the circuit breaker, which decreases as the magnitude of the current increases