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26209 Grounding and bonding

Authored by TIMOTHY COLVIN

Professional Development

11th Grade

Used 13+ times

26209 Grounding and bonding
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A ground fault is described as an unintentional ____.

connection between two or more portions of the equipment grounding conductor

open connection between an electrical circuit or equipment and the earth

conducting connection between any of the conductors of an electrical system

electrically conducting connection between an ungrounded conductor of an electrical circuit and the normally non-current-carrying conductors

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where a main bonding jumper is required by the NEC®, the jumper cannot be less than what percentage of the area of the largest phase conductor?

12.50%

14%

17.50%

20%

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

one-point test

three-point tes

six-point test

ten-point test

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If Single-Gang, Nail-on, nonmetallic boxes are used with NM cable, which of the following is true?

No connection to the box is required.

A grounding clip connects the box to the cable.

Electrical tape connects the box to the cable.

A standard electrician’s staple connects the box to the cable.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The fall-of-potential method is used to measure ____.

induced currents

step voltage

earth resistance

touch voltage

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rod, pipe, and plate electrodes must have a resistance to ground of at least ____.

25 ohms or less

35 ohms or less

45 ohms or less

75 ohms or less

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a separately derived system, the equipment bonding jumper connects the ____.

system housing to the neutral bus bar

system housing to the feeder panel

neutral on the supply side to the equipment housing

neutral bus bar to the grounding electrode conductor

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