Texas Electrical Contractor License
Practice Exam Questions And Correct
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Rationales 2026 Q&A | Instant
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1. What is the minimum size copper grounding electrode conductor for a
200-amp residential service?
A. 2 AWG
B. 4 AWG
C. 6 AWG
D. 8 AWG
A 200-amp service requires a minimum 6 AWG copper grounding electrode
conductor according to NEC Table 250.66.
2. Which of the following is required to obtain an Electrical Contractor
License in Texas?
A. Passing the Journeyman exam
B. Employing a licensed Master Electrician
C. Submitting a criminal background check
D. Holding an associate’s degree in electrical engineering
,Texas law requires an Electrical Contractor to have a licensed Master
Electrician assigned to the business.
3. What is the required burial depth for a direct-burial cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
NEC Table 300.5 requires 24 inches of cover for direct-burial cables under
driveways.
4. Which type of conduit is required for exposed outdoor installations
subject to physical damage?
A. EMT
B. RMC
C. PVC
D. FMC
RMC (Rigid Metal Conduit) offers maximum protection from physical
damage and is suitable for outdoor use.
5. How often must the Texas Electrical Contractor License be renewed?
A. Every year
B. Every year with annual fee and CEU
C. Every 2 years
D. Every 3 years
Texas Electrical Contractor Licenses must be renewed annually, and
continuing education is required.
6. What is the maximum number of 12 AWG conductors allowed in a 4”
square box that is 1-1/2” deep?
, A. 6
B. 7
C. 9
D. 11
Using box fill calculations from NEC 314.16, the box provides 21 cu. in. of
volume, allowing 9 conductors at 2.25 cu. in. each.
7. What is the color for the grounded (neutral) conductor in a 120/240V
system?
A. Green
B. Black
C. White
D. Red
White or gray are standard colors for grounded (neutral) conductors per
NEC 200.6.
8. Which of the following systems must be grounded?
A. 3-phase, 3-wire delta
B. Single-phase, 3-wire
C. Isolated power systems
D. 480V corner-grounded delta
Single-phase, 3-wire systems must be grounded to ensure safety and
proper operation.
9. What does Article 230 of the NEC primarily address?
A. Branch circuits
B. Services
C. Transformers
D. Wiring methods
Article 230 in the NEC deals with services, including service entrance
conductors and equipment.
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the minimum size copper grounding electrode conductor for a
200-amp residential service?
A. 2 AWG
B. 4 AWG
C. 6 AWG
D. 8 AWG
A 200-amp service requires a minimum 6 AWG copper grounding electrode
conductor according to NEC Table 250.66.
2. Which of the following is required to obtain an Electrical Contractor
License in Texas?
A. Passing the Journeyman exam
B. Employing a licensed Master Electrician
C. Submitting a criminal background check
D. Holding an associate’s degree in electrical engineering
,Texas law requires an Electrical Contractor to have a licensed Master
Electrician assigned to the business.
3. What is the required burial depth for a direct-burial cable under a
residential driveway?
A. 12 inches
B. 18 inches
C. 24 inches
D. 30 inches
NEC Table 300.5 requires 24 inches of cover for direct-burial cables under
driveways.
4. Which type of conduit is required for exposed outdoor installations
subject to physical damage?
A. EMT
B. RMC
C. PVC
D. FMC
RMC (Rigid Metal Conduit) offers maximum protection from physical
damage and is suitable for outdoor use.
5. How often must the Texas Electrical Contractor License be renewed?
A. Every year
B. Every year with annual fee and CEU
C. Every 2 years
D. Every 3 years
Texas Electrical Contractor Licenses must be renewed annually, and
continuing education is required.
6. What is the maximum number of 12 AWG conductors allowed in a 4”
square box that is 1-1/2” deep?
, A. 6
B. 7
C. 9
D. 11
Using box fill calculations from NEC 314.16, the box provides 21 cu. in. of
volume, allowing 9 conductors at 2.25 cu. in. each.
7. What is the color for the grounded (neutral) conductor in a 120/240V
system?
A. Green
B. Black
C. White
D. Red
White or gray are standard colors for grounded (neutral) conductors per
NEC 200.6.
8. Which of the following systems must be grounded?
A. 3-phase, 3-wire delta
B. Single-phase, 3-wire
C. Isolated power systems
D. 480V corner-grounded delta
Single-phase, 3-wire systems must be grounded to ensure safety and
proper operation.
9. What does Article 230 of the NEC primarily address?
A. Branch circuits
B. Services
C. Transformers
D. Wiring methods
Article 230 in the NEC deals with services, including service entrance
conductors and equipment.
