ESC ESC Electrical Grounding & Bonding

Question 1

What is the primary purpose of electrical grounding in a system?

Accepted Answer

To provide a safe path for fault current to return to the source

Answer

To increase circuit efficiency

Answer

To reduce electrical resistance

Answer

To improve power factor

Question 2

Which NEC article primarily covers grounding and bonding requirements?

Accepted Answer

Article 250

Answer

Article 210

Answer

Article 230

Answer

Article 300

Question 3

What is the primary function of bonding in an electrical system?

Accepted Answer

To establish electrical continuity between conductive parts

Answer

To carry load current

Answer

To step down voltage

Answer

To increase circuit capacity

Question 4

What is a grounding electrode conductor (GEC)?

Accepted Answer

The conductor connecting the grounding electrode system to the service equipment

Answer

The conductor that carries load current

Answer

The conductor that bonds metal parts together

Answer

The neutral wire inside a panel

Question 5

If a single ground rod does not meet the 25-ohm resistance requirement, what does the NEC require?

Accepted Answer

Install a supplemental grounding electrode

Answer

Replace it with a larger diameter rod

Answer

Connect it only to the metal water pipe

Answer

Use chemical grounding enhancement

Question 6

Which grounding electrode is generally considered the most effective per NEC requirements?

Accepted Answer

Concrete-encased electrode (Ufer ground)

Answer

Ground rod

Answer

Ground plate

Answer

Metal water pipe alone