Journeyman Electrician Licensing Exam
With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of grounding an electrical system?
A. To reduce voltage drop
B. To stabilize frequency
C. To provide a low-resistance path for fault current
D. To increase load capacity
Grounding protects people and equipment by safely directing fault
current to earth, allowing overcurrent devices to operate.
2. What is the minimum cover depth for rigid metal conduit (RMC)
installed under a residential driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
NEC burial requirements specify 18 inches of cover for RMC under
driveways.
, 3. Which conductor is permitted to be re-identified with white tape
to indicate a grounded conductor?
A. 10 AWG copper
B. 4 AWG or larger copper
C. 12 AWG aluminum
D. Any size conductor
Only conductors 4 AWG and larger may be re-identified for use as a
grounded conductor.
4. What device is required to protect personnel from ground-fault
shock in wet locations?
A. AFCI
B. Circuit breaker
C. Surge protector
D. GFCI
GFCIs detect small current imbalances and trip quickly to prevent
electric shock.
5. What is the maximum allowable voltage drop recommended for
branch circuits?
A. 1%
B. 2%
C. 3%
D. 5%
The NEC recommends limiting branch-circuit voltage drop to 3% for
efficiency.
, 6. A 20-amp branch circuit requires a minimum copper conductor
size of:
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
12 AWG copper is rated for 20 amps under normal conditions.
7. What type of fire extinguisher is suitable for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Class C extinguishers are designed for energized electrical equipment.
8. What is the function of a bonding jumper?
A. Increase voltage
B. Ensure electrical continuity between metal parts
C. Reduce impedance
D. Prevent arcing
Bonding jumpers connect metal components to maintain a continuous
fault-current path.
9. How many current-carrying conductors are allowed in a conduit
before derating is required?
A. 2
, B. More than 3
C. 6
D. 10
Ampacity derating begins when more than three current-carrying
conductors share a raceway.
10. What color insulation is used for an equipment grounding
conductor?
A. White
B. Red
C. Green or bare
D. Black
Green or bare conductors identify equipment grounding conductors.
11. What is the minimum working clearance in front of electrical
panels rated 600 volts or less?
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
NEC requires 36 inches of clear working space for safety.
12. Which tool is best for measuring current without opening
the circuit?
A. Voltmeter
B. Ohmmeter
With Actual Questions & Verified
Answers, Plus Explained
Rationales/Expert Verified For
Guaranteed Pass 2026/Latest
Updated/Instant Download Pdf
1. What is the primary purpose of grounding an electrical system?
A. To reduce voltage drop
B. To stabilize frequency
C. To provide a low-resistance path for fault current
D. To increase load capacity
Grounding protects people and equipment by safely directing fault
current to earth, allowing overcurrent devices to operate.
2. What is the minimum cover depth for rigid metal conduit (RMC)
installed under a residential driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
NEC burial requirements specify 18 inches of cover for RMC under
driveways.
, 3. Which conductor is permitted to be re-identified with white tape
to indicate a grounded conductor?
A. 10 AWG copper
B. 4 AWG or larger copper
C. 12 AWG aluminum
D. Any size conductor
Only conductors 4 AWG and larger may be re-identified for use as a
grounded conductor.
4. What device is required to protect personnel from ground-fault
shock in wet locations?
A. AFCI
B. Circuit breaker
C. Surge protector
D. GFCI
GFCIs detect small current imbalances and trip quickly to prevent
electric shock.
5. What is the maximum allowable voltage drop recommended for
branch circuits?
A. 1%
B. 2%
C. 3%
D. 5%
The NEC recommends limiting branch-circuit voltage drop to 3% for
efficiency.
, 6. A 20-amp branch circuit requires a minimum copper conductor
size of:
A. 14 AWG
B. 12 AWG
C. 10 AWG
D. 8 AWG
12 AWG copper is rated for 20 amps under normal conditions.
7. What type of fire extinguisher is suitable for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Class C extinguishers are designed for energized electrical equipment.
8. What is the function of a bonding jumper?
A. Increase voltage
B. Ensure electrical continuity between metal parts
C. Reduce impedance
D. Prevent arcing
Bonding jumpers connect metal components to maintain a continuous
fault-current path.
9. How many current-carrying conductors are allowed in a conduit
before derating is required?
A. 2
, B. More than 3
C. 6
D. 10
Ampacity derating begins when more than three current-carrying
conductors share a raceway.
10. What color insulation is used for an equipment grounding
conductor?
A. White
B. Red
C. Green or bare
D. Black
Green or bare conductors identify equipment grounding conductors.
11. What is the minimum working clearance in front of electrical
panels rated 600 volts or less?
A. 24 inches
B. 36 inches
C. 42 inches
D. 48 inches
NEC requires 36 inches of clear working space for safety.
12. Which tool is best for measuring current without opening
the circuit?
A. Voltmeter
B. Ohmmeter
