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
At a separately derived system, the grounding electrode conductor must be connected to the:
Answer: Neutral point of the derived system
Per NEC 250.30(A), the grounding electrode conductor for a separately derived system connects to the neutral (grounded) point of that system.
A main bonding jumper is required at the:
Answer: Service entrance equipment only
The main bonding jumper connects the grounded conductor to the equipment grounding conductor and is required only at the service entrance equipment.
Which conductor connects metal parts of equipment to the equipment grounding conductor or grounding electrode?
Answer: Equipment bonding jumper
An equipment bonding jumper connects metal parts of equipment to ensure they are at ground potential and part of the fault current path.
For a 200A service, what is the minimum size copper grounding electrode conductor required per NEC Table 250.66?
Answer: 4 AWG
Per NEC Table 250.66, for service entrance conductors of 3/0 AWG copper (typical for 200A), a 4 AWG copper GEC is required.
What is the minimum burial depth for a ground rod electrode per NEC 250.53(G)?
Answer: 8 feet
Per NEC 250.53(G), rod and pipe electrodes must be installed so at least 8 feet of length is in contact with the soil.
In a multi-wire branch circuit, which of the following best describes the neutral conductor's role with respect to grounding?
Answer: It is the grounded conductor and must not be used as an EGC
The neutral is the grounded conductor and carries return current; per NEC 250.142(B), it cannot serve as an EGC downstream of the service.
Bonding of metal water piping systems within a building is required by NEC 250.104 to ensure:
Answer: The piping is part of the effective ground-fault path
NEC 250.104 requires interior metal water piping to be bonded so it is part of the effective ground-fault current path, reducing shock hazard.