Journeyman Electrician's Grounding and Bonding Flashcards
7 cards from real Journeyman Electrician’s Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Journeyman Electrician's Grounding and Bonding flashcards as text
What is the minimum size equipment grounding conductor required for a 60-ampere circuit protected by a 60A breaker per NEC Table 250.122?
Answer: 10 AWG copper
Per NEC Table 250.122, a 60A overcurrent device requires a minimum 10 AWG copper equipment grounding conductor.
Which NEC article primarily covers grounding and bonding requirements?
Answer: Article 250
NEC Article 250 covers all grounding and bonding requirements for electrical systems.
A grounding electrode conductor is used to connect the grounded conductor to the:
Answer: Grounding electrode system
The grounding electrode conductor connects the grounded (neutral) conductor or equipment to the grounding electrode system.
What is the purpose of bonding in an electrical system?
Answer: To establish electrical continuity between conductive parts
Bonding establishes electrical continuity and conductivity between conductive parts to ensure a low-impedance path for fault current.
When installing a grounding electrode conductor in a metal raceway, what additional bonding requirement applies?
Answer: Both ends of the raceway must be bonded to the conductor
Per NEC 250.64(E), metal raceways enclosing a grounding electrode conductor must be bonded at both ends to the conductor.
Which of the following may NOT be used as a grounding electrode per NEC 250.52?
Answer: Metal underground gas piping system
Per NEC 250.52(B)(1), underground gas piping systems are specifically prohibited as grounding electrodes.
What is the maximum resistance allowed for a single-rod grounding electrode before a supplemental electrode is required per NEC 250.56?
Answer: 25 ohms
Per NEC 250.56, if a single rod, pipe, or plate electrode has a resistance exceeding 25 ohms, a supplemental electrode must be added.