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According to the NEC, what is the definition of a 'branch circuit'?

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B
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Free Journeyman Electrician Practice Test by State 2026: 3,700+ NEC Questions24 min read
2026 Statistics

Key Facts: TX Electrician Exam

27%

Pass Rate (2024)

Texas TDLR

70% each

Passing Score

Two-part exam

80

Total Questions

Knowledge + Calculations

$78

Exam Fee

PSI/TDLR

The Texas Journeyman Electrician exam has one of the lowest pass rates in the country — only 27% passed in 2024. As of March 2025, the exam is split into two parts: NEC Knowledge (code navigation) and Calculations (load calculations, voltage drop, conductor sizing), each requiring 70% to pass. The total exam is 80 questions in 4 hours with a $78 fee. Based on the 2023 NEC.

Sample TX Electrician Practice Questions

Try these sample questions to test your TX Electrician exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to the NEC, what is the definition of a 'branch circuit'?
A.The circuit conductors between the service point and the main disconnecting means
B.The circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)
C.Any circuit that supplies power to a motor
D.The conductors between the transformer and the first overcurrent device
Explanation: Per NEC Article 100, a branch circuit is defined as the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s). This definition is fundamental to understanding how the NEC organizes and regulates different parts of an electrical system.
2In Texas, the Department of Licensing and Regulation (TDLR) oversees electrician licensing. What NEC edition does Texas use for the journeyman electrician exam?
A.NEC 2017
B.NEC 2020
C.NEC 2023
D.NEC 2026
Explanation: Texas has adopted the 2023 NEC through the Texas Department of Licensing and Regulation (TDLR). The PSI-administered exam was restructured in March 2025 into two parts: NEC Knowledge and Calculations, each requiring 70% to pass.
3Per NEC 210.8(A), GFCI protection is required for all 125-volt through 250-volt receptacles in which of the following dwelling unit locations?
A.Living rooms
B.Bedrooms
C.Kitchens
D.Closets
Explanation: NEC 210.8(A) requires GFCI protection for 125-volt through 250-volt receptacles in dwelling unit kitchens, along with bathrooms, garages, outdoors, crawl spaces, basements, and other specified locations. The 2023 NEC expanded GFCI requirements significantly.
4What is the minimum size equipment grounding conductor required for a 60-ampere circuit per NEC Table 250.122?
A.14 AWG copper
B.12 AWG copper
C.10 AWG copper
D.8 AWG copper
Explanation: Per NEC Table 250.122, a 60-ampere overcurrent device requires a minimum 10 AWG copper equipment grounding conductor. This table is based on the rating of the overcurrent device protecting the circuit, not the conductor ampacity.
5According to NEC 250.66, what is the minimum size grounding electrode conductor for a 2/0 AWG copper service conductor?
A.8 AWG copper
B.6 AWG copper
C.4 AWG copper
D.2 AWG copper
Explanation: Per NEC Table 250.66, for service conductors sized 2/0 AWG copper (or 4/0 AWG aluminum), the minimum grounding electrode conductor is 4 AWG copper or 2 AWG aluminum. This table correlates the size of the largest service-entrance conductor with the required grounding electrode conductor.
6What is the standard voltage drop recommendation for branch circuits per NEC 210.19(A) Informational Note No. 4?
A.2%
B.3%
C.5%
D.8%
Explanation: NEC 210.19(A) Informational Note No. 4 recommends that voltage drop on branch circuits should not exceed 3%, and the total voltage drop for feeders and branch circuits combined should not exceed 5%. While these are recommendations rather than requirements, they represent good practice.
7Per NEC Table 310.16, what is the ampacity of a 6 AWG THWN-2 copper conductor at 75°C column?
A.40 amperes
B.55 amperes
C.65 amperes
D.75 amperes
Explanation: Per NEC Table 310.16, a 6 AWG copper conductor with a 75°C insulation rating (such as THWN-2 used at 75°C) has an ampacity of 65 amperes. THWN-2 is rated for 90°C but is commonly used at the 75°C column when terminated at equipment rated for 75°C.
8According to NEC 314.16(B), what is the volume allowance for each 12 AWG conductor in a box fill calculation?
A.2.00 cubic inches
B.2.25 cubic inches
C.2.50 cubic inches
D.3.00 cubic inches
Explanation: Per NEC Table 314.16(B), each 12 AWG conductor requires a volume allowance of 2.25 cubic inches in a box fill calculation. This includes equipment grounding conductors counted as one conductor, device yokes counted as two conductors, and clamps counted as one conductor.
9Per NEC 430.52, what is the maximum size dual-element time-delay fuse permitted for motor branch-circuit short-circuit and ground-fault protection for a standard AC motor?
A.125% of motor FLC
B.150% of motor FLC
C.175% of motor FLC
D.250% of motor FLC
Explanation: Per NEC Table 430.52, the maximum rating for a dual-element time-delay fuse used for motor branch-circuit short-circuit and ground-fault protection is 175% of the motor's full-load current. If 175% does not correspond to a standard fuse size, the next higher standard size may be used.
10What is the minimum height above grade for service drop conductors over a residential driveway?
A.10 feet
B.12 feet
C.15 feet
D.18 feet
Explanation: Per NEC 230.24(B)(1), service drop conductors must maintain a minimum clearance of 12 feet above residential driveways and commercial areas not subject to truck traffic. This clearance ensures safe passage of vehicles beneath the conductors.

About the TX Electrician Exam

The Texas Journeyman Electrician exam is administered by PSI for the Texas Department of Licensing and Regulation (TDLR). Based on the 2023 NEC, the exam was restructured in March 2025 into two parts: NEC Knowledge and Calculations. Each part requires 70% to pass independently. The exam covers electrical theory, code compliance, grounding, wiring methods, load calculations, motors, and special occupancies.

Questions

80 scored questions

Time Limit

4 hours total

Passing Score

70% each part

Exam Fee

$78 (TX TDLR / PSI)

TX Electrician Exam Content Outline

20%

NEC General & Theory

Definitions, electrical theory, NEC navigation, working space requirements, and installation fundamentals

20%

Branch Circuits & Overcurrent Protection

Circuit sizing, receptacle spacing, GFCI/AFCI requirements, overcurrent protection, and lighting outlets

15%

Grounding & Bonding

Grounding electrode systems, equipment grounding, bonding requirements, and ground-fault protection

20%

Wiring Methods & Materials

Conductor ampacity, conduit fill, cable assemblies, box fill calculations, and raceway types

25%

Services, Feeders, Motors & Special Occupancies

Service entrance requirements, load calculations, motor circuits, transformers, hazardous locations, and healthcare facilities

How to Pass the TX Electrician Exam

What You Need to Know

  • Passing score: 70% each part
  • Exam length: 80 questions
  • Time limit: 4 hours total
  • Exam fee: $78

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

TX Electrician Study Tips from Top Performers

1Practice both NEC code lookup AND calculations separately — Texas tests them as two distinct parts
2Master NEC Article 250 (Grounding and Bonding) — heavily tested in the Knowledge portion
3Drill dwelling unit and commercial load calculations until they are second nature for the Calculations portion
4Learn to navigate the NEC index quickly — with only 27% passing, speed and accuracy are critical
5Take multiple timed practice exams to build endurance and time management skills

Frequently Asked Questions

How is the Texas electrician exam structured as of 2025?

As of March 2025, the Texas journeyman electrician exam is split into two parts: NEC Knowledge (code lookup and navigation) and Calculations (load calculations, voltage drop, conductor sizing). Each part requires 70% to pass independently. The total exam is 80 questions in 4 hours.

Why is the Texas electrician exam pass rate so low?

Texas reported only a 27% pass rate in 2024, among the lowest in the nation. Common reasons include underestimating the depth of NEC knowledge required, poor time management, and insufficient practice with calculations. The two-part format means you must pass both portions.

What NEC edition does Texas use?

Texas has adopted the 2023 NEC through TDLR. The exam allows a bound copy of the 2023 NEC as a reference for both the Knowledge and Calculations portions.

How much does the Texas electrician exam cost?

The exam fee is $78 through PSI. Additional costs include the NEC 2023 codebook ($100+) and study materials. Apply through TDLR before scheduling with PSI.