NEC Grounding and Bonding 2

Question 1

Which NEC article specifically governs grounding and bonding requirements?

Accepted Answer

Article 250

Answer

Article 100

Answer

Article 310

Answer

Article 408

Question 2

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

Accepted Answer

Provide a low-impedance fault-current path

Answer

Carry normal load current

Answer

Reduce voltage drop on circuits

Answer

Serve as a neutral conductor

Question 3

A grounding electrode conductor connects the grounded system to what?

Accepted Answer

The grounding electrode

Answer

The service neutral only

Answer

The largest motor frame

Answer

A surge protective device

Question 4

What is the maximum resistance generally desired for a single made electrode before a supplemental electrode is required?

Accepted Answer

25 ohms

Answer

1 ohm

Answer

5 ohms

Answer

100 ohms

Question 5

Which of these is NOT recognized as a grounding electrode in 250.52?

Accepted Answer

Interior gas piping

Answer

Metal underground water pipe

Answer

Concrete-encased electrode

Answer

Ground rod

Question 6

A concrete-encased electrode (Ufer ground) must use at least how much bare rebar or copper conductor?

Accepted Answer

20 ft

Answer

10 ft

Answer

25 ft

Answer

50 ft

Question 7

The metal underground water pipe electrode must be in direct contact with earth for at least how many feet?

Accepted Answer

10 ft

Answer

5 ft

Answer

20 ft

Answer

25 ft