NEC Grounding and Bonding 2

Question 1

Which NEC article specifically governs grounding and bonding requirements?

Accepted Answer

Article 250

Answer

Article 250 covers grounding and bonding requirements throughout the NEC.

Question 2

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

Accepted Answer

Provide a low-impedance fault-current path

Answer

The EGC provides a low-impedance path for fault current to facilitate overcurrent device operation.

Question 3

A grounding electrode conductor connects the grounded system to what?

Accepted Answer

The grounding electrode

Answer

The grounding electrode conductor connects the system or equipment to the grounding electrode.

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

A single rod, pipe, or plate electrode with resistance over 25 ohms must be supplemented with an additional electrode.

Question 5

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

Accepted Answer

Interior gas piping

Answer

Interior gas piping is prohibited from being used as a grounding electrode.

NEC Practice Test