CEA CEA Grounding, Bonding, and Electrical Service Equipment Questions and Answers

Question 1

What is the primary purpose of an equipment grounding conductor (EGC)?

Accepted Answer

To provide a low-impedance path for fault current so overcurrent devices operate quickly

Answer

To carry normal load current back to the source

Answer

To reduce voltage drop on branch circuits

Answer

To bond the neutral conductor to the panel

Question 2

What is the difference between grounding and bonding?

Accepted Answer

Grounding connects the system to earth; bonding connects conductive parts together to equalize potential

Answer

They are the same thing

Answer

Bonding connects to earth; grounding connects conductors together

Answer

Grounding is only for high-voltage systems

Question 3

According to NEC Article 250, which conductor connects the grounded (neutral) conductor to the equipment grounding conductor at the service?

Accepted Answer

Main bonding jumper

Answer

Equipment grounding conductor

Answer

System bonding jumper

Answer

Grounding electrode conductor

Question 4

What is a grounding electrode conductor (GEC)?

Accepted Answer

The conductor that connects the grounded system conductor or equipment to the grounding electrode

Answer

The conductor that bonds equipment enclosures together

Answer

The conductor inside flexible metal conduit

Answer

The conductor that returns load current to the transformer

Question 5

Which of the following is a listed grounding electrode per NEC 250.52?

Accepted Answer

Concrete-encased electrode (Ufer ground)

Answer

Aluminum water service pipe

Answer

Plastic water pipe with metallic fittings

Answer

PVC conduit buried 30 inches

Question 6

When two or more ground rods are used as the grounding electrode system, what is the minimum spacing between them per the NEC?

Accepted Answer

8 feet

Answer

4 feet

Answer

6 feet

Answer

10 feet