Texas Electrician Licensing Exam – 2025 Edition
120 Questions and Answers & Rtionales | 2025/2026 |
Instant Download !!
1. A 20-amp branch circuit supplying general-purpose receptacles in a residence
must use conductors no smaller than what size?
a. 16 AWG
b. 14 AWG
c. 12 AWG (Correct Answer)
d. 10 AWG
Rationale: NEC requires 12 AWG minimum for 20-amp circuits.
2. The NEC requires receptacles in bathrooms to be protected by which device?
a. AFCI
b. GFCI (Correct Answer)
c. Overcurrent relay
d. Isolation transformer
Rationale: GFCI protection is mandatory in all bathrooms.
3. Which of the following is the maximum allowed voltage drop on a branch
circuit?
a. 10%
b. 3% (Correct Answer)
,c. 7%
d. 1%
Rationale: NEC recommends max 3% voltage drop on branch circuits.
4. A service disconnecting means must be located…
a. In the attic
b. In a bedroom
c. Readily accessible outside or near the point of entrance (Correct Answer)
d. Inside a locked cabinet
Rationale: NEC requires accessibility at service point.
5. What is the minimum burial depth for non-metallic direct-burial cable?
a. 6 inches
b. 12 inches
c. 24 inches (Correct Answer)
d. 36 inches
Rationale: Direct-burial cable typically requires 24-inch depth.
6. EMT must be supported within how many feet of each box?
a. 6 ft
b. 10 ft
c. 3 ft (Correct Answer)
d. 1 ft
Rationale: EMT requires support within 3 ft.
,7. What is the standard nominal voltage for residential single-phase systems in
Texas?
a. 120/120
b. 240/240
c. 120/240 (Correct Answer)
d. 277/480
Rationale: Standard residential power is 120/240V.
8. Which conductor must always be grounded?
a. Hot
b. Switch leg
c. Neutral (Correct Answer)
d. Travelers
Rationale: The neutral conductor is the grounded conductor.
9. The maximum overcurrent protection for #14 AWG copper is what?
a. 25A
b. 20A
c. 15A (Correct Answer)
d. 10A
Rationale: 14 AWG copper is limited to 15A.
10. A continuous load must be calculated at what percentage?
a. 100%
b. 125% (Correct Answer)
, c. 75%
d. 150%
Rationale: Continuous loads must be rated at 125%.
11. What is the minimum size copper grounding electrode conductor for a 200A
service?
a. 10 AWG
b. 4 AWG (Correct Answer)
c. 8 AWG
d. 2 AWG
Rationale: 200A services require #4 copper grounding electrode conductor.
12. Conductors installed in parallel must be…
a. Different lengths
b. Identical in size, insulation, and material (Correct Answer)
c. Twisted together
d. Aluminum only
Rationale: NEC requires identical conductors in parallel.
13. The minimum working clearance in front of electrical equipment is…
a. 1 ft
b. 2 ft
c. 3 ft (Correct Answer)
d. 4 ft
Rationale: NEC requires 36 inches minimum clearance.
120 Questions and Answers & Rtionales | 2025/2026 |
Instant Download !!
1. A 20-amp branch circuit supplying general-purpose receptacles in a residence
must use conductors no smaller than what size?
a. 16 AWG
b. 14 AWG
c. 12 AWG (Correct Answer)
d. 10 AWG
Rationale: NEC requires 12 AWG minimum for 20-amp circuits.
2. The NEC requires receptacles in bathrooms to be protected by which device?
a. AFCI
b. GFCI (Correct Answer)
c. Overcurrent relay
d. Isolation transformer
Rationale: GFCI protection is mandatory in all bathrooms.
3. Which of the following is the maximum allowed voltage drop on a branch
circuit?
a. 10%
b. 3% (Correct Answer)
,c. 7%
d. 1%
Rationale: NEC recommends max 3% voltage drop on branch circuits.
4. A service disconnecting means must be located…
a. In the attic
b. In a bedroom
c. Readily accessible outside or near the point of entrance (Correct Answer)
d. Inside a locked cabinet
Rationale: NEC requires accessibility at service point.
5. What is the minimum burial depth for non-metallic direct-burial cable?
a. 6 inches
b. 12 inches
c. 24 inches (Correct Answer)
d. 36 inches
Rationale: Direct-burial cable typically requires 24-inch depth.
6. EMT must be supported within how many feet of each box?
a. 6 ft
b. 10 ft
c. 3 ft (Correct Answer)
d. 1 ft
Rationale: EMT requires support within 3 ft.
,7. What is the standard nominal voltage for residential single-phase systems in
Texas?
a. 120/120
b. 240/240
c. 120/240 (Correct Answer)
d. 277/480
Rationale: Standard residential power is 120/240V.
8. Which conductor must always be grounded?
a. Hot
b. Switch leg
c. Neutral (Correct Answer)
d. Travelers
Rationale: The neutral conductor is the grounded conductor.
9. The maximum overcurrent protection for #14 AWG copper is what?
a. 25A
b. 20A
c. 15A (Correct Answer)
d. 10A
Rationale: 14 AWG copper is limited to 15A.
10. A continuous load must be calculated at what percentage?
a. 100%
b. 125% (Correct Answer)
, c. 75%
d. 150%
Rationale: Continuous loads must be rated at 125%.
11. What is the minimum size copper grounding electrode conductor for a 200A
service?
a. 10 AWG
b. 4 AWG (Correct Answer)
c. 8 AWG
d. 2 AWG
Rationale: 200A services require #4 copper grounding electrode conductor.
12. Conductors installed in parallel must be…
a. Different lengths
b. Identical in size, insulation, and material (Correct Answer)
c. Twisted together
d. Aluminum only
Rationale: NEC requires identical conductors in parallel.
13. The minimum working clearance in front of electrical equipment is…
a. 1 ft
b. 2 ft
c. 3 ft (Correct Answer)
d. 4 ft
Rationale: NEC requires 36 inches minimum clearance.
