Texas Electrical Contractor Exam Newest
(2026 Update) Actual Practice Questions –
Set 100 Most Common Exam Questions
And Answers In Details 100% Verified Exam
Highly Recommendable For Grade A+
1. A contractor is planning service equipment installation. What is the
minimum clearance required in front of electrical equipment operating at
600V or less?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
✔ Correct Answer: B. 3 feet
Explanation: NEC 110.26 requires a minimum of 3 feet working clearance
for equipment up to 150V to ground under typical conditions.
2. Which NEC article covers grounding and bonding requirements?
A. Article 210
B. Article 250
C. Article 300
D. Article 400
✔ Correct Answer: B. Article 250
Explanation: NEC Article 250 governs grounding and bonding to ensure
electrical safety and fault current paths.
3. What is the maximum number of 12 AWG conductors allowed in a 3/4-inch
EMT conduit?
A. 9
, B. 12
C. 16
D. 20
✔ Correct Answer: C. 16
Explanation: NEC Chapter 9 Table 1 and Annex C specify conduit fill limits;
16 conductors is the maximum for 3/4-inch EMT.
4. A branch circuit supplies continuous load. What factor must be applied to
determine conductor size?
A. 100%
B. 110%
C. 125%
D. 150%
✔ Correct Answer: C. 125%
Explanation: Continuous loads must be calculated at 125% per NEC
210.20(A).
5. What is the minimum burial depth for direct-buried UF cable in residential
applications?
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
✔ Correct Answer: C. 24 inches
Explanation: NEC Table 300.5 requires 24-inch minimum cover for direct
burial cables.
6. What type of receptacle is required in bathrooms?
A. AFCI
B. GFCI
C. Isolated ground
D. Weather-resistant
✔ Correct Answer: B. GFCI
Explanation: NEC 210.8 requires GFCI protection in bathroom receptacles.
, 7. Which conductor is used for grounding?
A. Black
B. Red
C. Green
D. White
✔ Correct Answer: C. Green
Explanation: Green or bare conductors are used for equipment grounding.
8. What is the minimum size copper grounding electrode conductor for a 200-
amp service?
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
✔ Correct Answer: B. #6 AWG
Explanation: NEC Table 250.66 specifies #6 copper for typical 200A service
grounding.
9. What NEC article covers overcurrent protection?
A. 210
B. 215
C. 240
D. 250
✔ Correct Answer: C. 240
Explanation: Article 240 addresses overcurrent protection requirements.
10.A conductor with insulation rating of 90°C must be sized based on which
temperature column?
A. 60°C
B. 75°C
C. 90°C
D. Any
✔ Correct Answer: B. 75°C
(2026 Update) Actual Practice Questions –
Set 100 Most Common Exam Questions
And Answers In Details 100% Verified Exam
Highly Recommendable For Grade A+
1. A contractor is planning service equipment installation. What is the
minimum clearance required in front of electrical equipment operating at
600V or less?
A. 2 feet
B. 3 feet
C. 4 feet
D. 5 feet
✔ Correct Answer: B. 3 feet
Explanation: NEC 110.26 requires a minimum of 3 feet working clearance
for equipment up to 150V to ground under typical conditions.
2. Which NEC article covers grounding and bonding requirements?
A. Article 210
B. Article 250
C. Article 300
D. Article 400
✔ Correct Answer: B. Article 250
Explanation: NEC Article 250 governs grounding and bonding to ensure
electrical safety and fault current paths.
3. What is the maximum number of 12 AWG conductors allowed in a 3/4-inch
EMT conduit?
A. 9
, B. 12
C. 16
D. 20
✔ Correct Answer: C. 16
Explanation: NEC Chapter 9 Table 1 and Annex C specify conduit fill limits;
16 conductors is the maximum for 3/4-inch EMT.
4. A branch circuit supplies continuous load. What factor must be applied to
determine conductor size?
A. 100%
B. 110%
C. 125%
D. 150%
✔ Correct Answer: C. 125%
Explanation: Continuous loads must be calculated at 125% per NEC
210.20(A).
5. What is the minimum burial depth for direct-buried UF cable in residential
applications?
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
✔ Correct Answer: C. 24 inches
Explanation: NEC Table 300.5 requires 24-inch minimum cover for direct
burial cables.
6. What type of receptacle is required in bathrooms?
A. AFCI
B. GFCI
C. Isolated ground
D. Weather-resistant
✔ Correct Answer: B. GFCI
Explanation: NEC 210.8 requires GFCI protection in bathroom receptacles.
, 7. Which conductor is used for grounding?
A. Black
B. Red
C. Green
D. White
✔ Correct Answer: C. Green
Explanation: Green or bare conductors are used for equipment grounding.
8. What is the minimum size copper grounding electrode conductor for a 200-
amp service?
A. #8 AWG
B. #6 AWG
C. #4 AWG
D. #2 AWG
✔ Correct Answer: B. #6 AWG
Explanation: NEC Table 250.66 specifies #6 copper for typical 200A service
grounding.
9. What NEC article covers overcurrent protection?
A. 210
B. 215
C. 240
D. 250
✔ Correct Answer: C. 240
Explanation: Article 240 addresses overcurrent protection requirements.
10.A conductor with insulation rating of 90°C must be sized based on which
temperature column?
A. 60°C
B. 75°C
C. 90°C
D. Any
✔ Correct Answer: B. 75°C
