Journeyman Electrician’s Exam Journeyman Electrician's Grounding and Bonding 2

Question 1

What is the minimum size equipment grounding conductor required for a 60-ampere circuit protected by a 60A breaker per NEC Table 250.122?

Accepted Answer

10 AWG copper

Answer

Per NEC Table 250.122, a 60A overcurrent device requires a minimum 10 AWG copper equipment grounding conductor.

Question 2

Which NEC article primarily covers grounding and bonding requirements?

Accepted Answer

Article 250

Answer

NEC Article 250 covers all grounding and bonding requirements for electrical systems.

Question 3

A grounding electrode conductor is used to connect the grounded conductor to the:

Accepted Answer

Grounding electrode system

Answer

The grounding electrode conductor connects the grounded (neutral) conductor or equipment to the grounding electrode system.

Question 4

What is the purpose of bonding in an electrical system?

Accepted Answer

To establish electrical continuity between conductive parts

Answer

Bonding establishes electrical continuity and conductivity between conductive parts to ensure a low-impedance path for fault current.

Question 5

When installing a grounding electrode conductor in a metal raceway, what additional bonding requirement applies?

Accepted Answer

Both ends of the raceway must be bonded to the conductor

Answer

Per NEC 250.64(E), metal raceways enclosing a grounding electrode conductor must be bonded at both ends to the conductor.

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