Arkansas Journeyman Electrician
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. What is the maximum number of current-carrying conductors permitted in
a raceway before an adjustment factor is required under NEC 310.15(C)(1)?
A. Two
B. Three
C. Four
D. Five
Answer: Three
Rationale: NEC 310.15(C)(1) requires adjustment when there are more than
three current-carrying conductors in a raceway, cable, or conductor bundle
under the conditions specified by the Code.
2. A 120/240-volt single-phase feeder supplies a dwelling load. Which
conductor is generally permitted to carry the unbalanced load current and
therefore may be excluded from the current-carrying conductor adjustment
calculation?
A. Equipment grounding conductor
B. Grounded neutral conductor
C. Bonding jumper
D. Grounding electrode conductor
,Answer: Grounded neutral conductor
Rationale: Under the applicable provisions of NEC 310.15, a neutral conductor
carrying only the imbalance of a multiwire circuit is generally not counted as a
current-carrying conductor.
3. What is the minimum copper conductor size generally permitted for a 20-
ampere branch circuit supplying receptacles?
A. 16 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
Answer: 12 AWG
Rationale: NEC 210.21(B)(3) and 310.16 establish the general conductor
ampacity relationship. A 20-ampere branch circuit normally requires 12 AWG
copper conductors.
4. A 15-ampere circuit is supplied by 14 AWG copper conductors. What is the
maximum permitted rating of the standard overcurrent protective device?
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 25 amperes
Answer: 15 amperes
Rationale: NEC 240.4(D)(3) limits 14 AWG copper conductors to a maximum 15-
ampere overcurrent device, subject to specific Code exceptions.
5. What is the minimum size copper equipment grounding conductor required
for a circuit protected by a 60-ampere overcurrent device?
A. 10 AWG
B. 8 AWG
,C. 6 AWG
D. 4 AWG
Answer: 10 AWG
Rationale: Table 250.122 requires a minimum 10 AWG copper equipment
grounding conductor for a 60-ampere overcurrent protective device.
6. A circuit uses 6 AWG copper ungrounded conductors and is installed in a
raceway. The conductors are increased to 4 AWG because of voltage-drop
concerns. What must happen to the equipment grounding conductor when
required by the applicable Code provisions?
A. It must remain 10 AWG
B. It must be increased proportionately
C. It may be eliminated
D. It must be reduced one size
Answer: It must be increased proportionately
Rationale: NEC 250.122(B) requires an equipment grounding conductor to be
increased proportionately in size when ungrounded conductors are increased in
size for voltage-drop or other reasons.
7. What is the primary purpose of a grounding electrode system?
A. To provide a normal return path for load current
B. To stabilize system voltage to earth and facilitate fault protection
C. To replace overcurrent protection
D. To eliminate the need for bonding
Answer: To stabilize system voltage to earth and facilitate fault protection
Rationale: Grounding establishes a reference to earth and assists in controlling
abnormal voltages. Bonding and equipment grounding provide the low-
impedance fault-current path necessary for protective-device operation.
, 8. Which grounding electrode is generally required to be used when present
at a building?
A. Metal underground water pipe electrode
B. Plastic water pipe
C. Wooden structural member
D. PVC conduit
Answer: Metal underground water pipe electrode
Rationale: A qualifying metal underground water pipe electrode must be
incorporated into the grounding electrode system and supplemented as required
by NEC 250.53.
9. What is the minimum length of a grounding electrode conductor
connection to a rod electrode required to be in contact with the earth?
A. 4 feet
B. 6 feet
C. 8 feet
D. 10 feet
Answer: 8 feet
Rationale: NEC 250.53(A)(2) generally requires a rod, pipe, or plate electrode to
have at least 8 feet of contact with soil unless an approved alternative
installation is used.
10.Two ground rods are installed as grounding electrodes. When may the
second rod be required?
A. Whenever the first rod has 8 feet of earth contact but resistance is unknown
B. Only when the service exceeds 200 amperes
C. Only for commercial buildings
D. Only when copper conductors are used
Answer: Whenever the first rod has 8 feet of earth contact but resistance is
unknown
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. What is the maximum number of current-carrying conductors permitted in
a raceway before an adjustment factor is required under NEC 310.15(C)(1)?
A. Two
B. Three
C. Four
D. Five
Answer: Three
Rationale: NEC 310.15(C)(1) requires adjustment when there are more than
three current-carrying conductors in a raceway, cable, or conductor bundle
under the conditions specified by the Code.
2. A 120/240-volt single-phase feeder supplies a dwelling load. Which
conductor is generally permitted to carry the unbalanced load current and
therefore may be excluded from the current-carrying conductor adjustment
calculation?
A. Equipment grounding conductor
B. Grounded neutral conductor
C. Bonding jumper
D. Grounding electrode conductor
,Answer: Grounded neutral conductor
Rationale: Under the applicable provisions of NEC 310.15, a neutral conductor
carrying only the imbalance of a multiwire circuit is generally not counted as a
current-carrying conductor.
3. What is the minimum copper conductor size generally permitted for a 20-
ampere branch circuit supplying receptacles?
A. 16 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
Answer: 12 AWG
Rationale: NEC 210.21(B)(3) and 310.16 establish the general conductor
ampacity relationship. A 20-ampere branch circuit normally requires 12 AWG
copper conductors.
4. A 15-ampere circuit is supplied by 14 AWG copper conductors. What is the
maximum permitted rating of the standard overcurrent protective device?
A. 10 amperes
B. 15 amperes
C. 20 amperes
D. 25 amperes
Answer: 15 amperes
Rationale: NEC 240.4(D)(3) limits 14 AWG copper conductors to a maximum 15-
ampere overcurrent device, subject to specific Code exceptions.
5. What is the minimum size copper equipment grounding conductor required
for a circuit protected by a 60-ampere overcurrent device?
A. 10 AWG
B. 8 AWG
,C. 6 AWG
D. 4 AWG
Answer: 10 AWG
Rationale: Table 250.122 requires a minimum 10 AWG copper equipment
grounding conductor for a 60-ampere overcurrent protective device.
6. A circuit uses 6 AWG copper ungrounded conductors and is installed in a
raceway. The conductors are increased to 4 AWG because of voltage-drop
concerns. What must happen to the equipment grounding conductor when
required by the applicable Code provisions?
A. It must remain 10 AWG
B. It must be increased proportionately
C. It may be eliminated
D. It must be reduced one size
Answer: It must be increased proportionately
Rationale: NEC 250.122(B) requires an equipment grounding conductor to be
increased proportionately in size when ungrounded conductors are increased in
size for voltage-drop or other reasons.
7. What is the primary purpose of a grounding electrode system?
A. To provide a normal return path for load current
B. To stabilize system voltage to earth and facilitate fault protection
C. To replace overcurrent protection
D. To eliminate the need for bonding
Answer: To stabilize system voltage to earth and facilitate fault protection
Rationale: Grounding establishes a reference to earth and assists in controlling
abnormal voltages. Bonding and equipment grounding provide the low-
impedance fault-current path necessary for protective-device operation.
, 8. Which grounding electrode is generally required to be used when present
at a building?
A. Metal underground water pipe electrode
B. Plastic water pipe
C. Wooden structural member
D. PVC conduit
Answer: Metal underground water pipe electrode
Rationale: A qualifying metal underground water pipe electrode must be
incorporated into the grounding electrode system and supplemented as required
by NEC 250.53.
9. What is the minimum length of a grounding electrode conductor
connection to a rod electrode required to be in contact with the earth?
A. 4 feet
B. 6 feet
C. 8 feet
D. 10 feet
Answer: 8 feet
Rationale: NEC 250.53(A)(2) generally requires a rod, pipe, or plate electrode to
have at least 8 feet of contact with soil unless an approved alternative
installation is used.
10.Two ground rods are installed as grounding electrodes. When may the
second rod be required?
A. Whenever the first rod has 8 feet of earth contact but resistance is unknown
B. Only when the service exceeds 200 amperes
C. Only for commercial buildings
D. Only when copper conductors are used
Answer: Whenever the first rod has 8 feet of earth contact but resistance is
unknown
