Module 26209-20 Study Guide

A generator system that supplies power where the neutral is not connected to the utility system, such as for carnivals, is known as a(n) _____

• separately derived system

• utility-interconnected system

• grounded system

• parallel system

A ground fault is described as an unintentional _____

• electrically conducting connection between an ungrounded conductor in a circuit and the normally noncurrent-carrying conductors

• connection between two grounded conductors

• break in the insulation of a grounded conductor

• short circuit between two live wires

A ground ring consisting of 20' of No. 2 bare copper must be buried no less than _____

• 2.5' below grade

• 1' below grade

• 6" below grade

• 4' below grade

A ground test utilizing an auxiliary current electrode and an auxiliary potential electrode is known as the _____

• three-point test

• four-point test

• resistance test

• potential drop test

A ground tester can be used to measure the value of a grounding electrode's _____

• resistance

• voltage

• capacitance

• inductance

A transformer bonding jumper is routed with the feeder conductors from the transformer to the equipment grounding bar in the panel and is known as a(n) _____.

• supply-side bonding jumper

• load-side bonding jumper

• main bonding jumper

• grounding electrode conductor

A transformer-supplied system operating at less than 50V must be grounded if the supply voltage to the transformer exceeds _____?

• 150V to ground

• 50V to ground

• 100V to ground

• 200V to ground

According to the NEC®, the path to ground from circuits, equipment, and metal enclosures must _____

• provide a permanent and continuous path sized to safely conduct potential fault current

• be disconnected during maintenance to prevent accidental grounding

• be made of non-conductive material to avoid electrical hazards

• only be connected when equipment is in use

Equipment grounding refers to connecting the normally noncurrent-carrying metal parts of equipment to the system grounded conductor and/or _____?

• the grounding electrode conductor

• the neutral bus bar

• the main circuit breaker

• the load terminal

How many ungrounded conductors must be taken from the first structure to where the service is located in the second structure when running 120V between buildings?

• 1

• 2

• 3

• 4