Texas Journeyman Electrician Licensing
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1. Which of the following is the maximum allowable voltage drop for a
branch circuit?
A. 1%
B. 3%
C. 5%
D. 10%
B. 3%
The National Electrical Code (NEC) recommends a maximum voltage
drop of 3% for branch circuits to ensure efficient operation of electrical
equipment.
2. A conductor must have an ampacity that is:
A. Less than the load it serves
B. Equal to the load it serves
C. Greater than or equal to the load it serves
D. Twice the load it serves
C. Greater than or equal to the load it serves
Conductors must have ampacity equal to or greater than the load to
prevent overheating and ensure safe operation.
3. Which type of conduit is typically used for underground installations?
A. EMT
, B. FMC
C. RMC
D. PVC
D. PVC
PVC conduit is commonly used for underground installations due to its
corrosion resistance and durability.
4. The NEC requires that a dwelling unit have at least how many 20-amp
small appliance branch circuits?
A. 1
B. 2
C. 3
D. 4
B. 2
At least two 20-amp small appliance branch circuits are required to
serve kitchen countertop outlets.
5. What color is typically used for an equipment grounding conductor?
A. Red
B. White
C. Green or bare
D. Black
C. Green or bare
Equipment grounding conductors are either green or bare to easily
identify them from other conductors.
6. What is the minimum burial depth for PVC conduit under a driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
C. 18 inches
According to the NEC, PVC conduit under driveways requires a
minimum burial depth of 18 inches to protect against physical damage.
7. The standard residential service voltage in Texas is:
A. 120/208V
, B. 120/240V
C. 277/480V
D. 240/480V
B. 120/240V
Most residential homes in Texas use 120/240V single-phase service.
8. Which device protects against ground-fault currents?
A. Circuit breaker
B. GFCI
C. AFCI
D. Fuse
B. GFCI
Ground-Fault Circuit Interrupters (GFCIs) detect small leakage currents
and quickly disconnect power to prevent shock.
9. In a three-phase, 4-wire wye system, the voltage between any phase and
neutral is:
A. Equal to the line-to-line voltage
B. Less than the line-to-line voltage
C. Greater than the line-to-line voltage
D. Zero
B. Less than the line-to-line voltage
Phase-to-neutral voltage is line-to-line voltage divided by √3 in a wye
system.
10.What is the minimum height for overhead service conductors above
residential driveways?
A. 10 feet
B. 12 feet
C. 18 feet
D. 20 feet
B. 12 feet
The NEC requires 12 feet minimum clearance for residential driveways
to prevent contact with vehicles.
11.Which of the following conductors is suitable for wet locations?
A. NM-B
Exam With Actual Questions & Verified
Answers,Plus Rationales/Expert
Verified For Guaranteed Pass Graded
A+/2026 /Latest Update/Instant
Download Pdf
1. Which of the following is the maximum allowable voltage drop for a
branch circuit?
A. 1%
B. 3%
C. 5%
D. 10%
B. 3%
The National Electrical Code (NEC) recommends a maximum voltage
drop of 3% for branch circuits to ensure efficient operation of electrical
equipment.
2. A conductor must have an ampacity that is:
A. Less than the load it serves
B. Equal to the load it serves
C. Greater than or equal to the load it serves
D. Twice the load it serves
C. Greater than or equal to the load it serves
Conductors must have ampacity equal to or greater than the load to
prevent overheating and ensure safe operation.
3. Which type of conduit is typically used for underground installations?
A. EMT
, B. FMC
C. RMC
D. PVC
D. PVC
PVC conduit is commonly used for underground installations due to its
corrosion resistance and durability.
4. The NEC requires that a dwelling unit have at least how many 20-amp
small appliance branch circuits?
A. 1
B. 2
C. 3
D. 4
B. 2
At least two 20-amp small appliance branch circuits are required to
serve kitchen countertop outlets.
5. What color is typically used for an equipment grounding conductor?
A. Red
B. White
C. Green or bare
D. Black
C. Green or bare
Equipment grounding conductors are either green or bare to easily
identify them from other conductors.
6. What is the minimum burial depth for PVC conduit under a driveway?
A. 6 inches
B. 12 inches
C. 18 inches
D. 24 inches
C. 18 inches
According to the NEC, PVC conduit under driveways requires a
minimum burial depth of 18 inches to protect against physical damage.
7. The standard residential service voltage in Texas is:
A. 120/208V
, B. 120/240V
C. 277/480V
D. 240/480V
B. 120/240V
Most residential homes in Texas use 120/240V single-phase service.
8. Which device protects against ground-fault currents?
A. Circuit breaker
B. GFCI
C. AFCI
D. Fuse
B. GFCI
Ground-Fault Circuit Interrupters (GFCIs) detect small leakage currents
and quickly disconnect power to prevent shock.
9. In a three-phase, 4-wire wye system, the voltage between any phase and
neutral is:
A. Equal to the line-to-line voltage
B. Less than the line-to-line voltage
C. Greater than the line-to-line voltage
D. Zero
B. Less than the line-to-line voltage
Phase-to-neutral voltage is line-to-line voltage divided by √3 in a wye
system.
10.What is the minimum height for overhead service conductors above
residential driveways?
A. 10 feet
B. 12 feet
C. 18 feet
D. 20 feet
B. 12 feet
The NEC requires 12 feet minimum clearance for residential driveways
to prevent contact with vehicles.
11.Which of the following conductors is suitable for wet locations?
A. NM-B
