Texas Journeyman Electrician exam: free 20-question diagnostic

Part 1: NEC Knowledge

Real exam: 59 questions in 130 minutes, about 2.2 minutes each.

1. TXJ-D01 · Definitions, theory and plans

   1. A disconnect must be "in sight from" the equipment it controls. If it is visible, what is the farthest it can be from that equipment?

   A) 25 ft B) 50 ft C) 75 ft D) 100 ft Check answer

2. TXJ-D02 · Services and service equipment

   2. What is the minimum rating of the service disconnecting means for a one-family dwelling?

   A) 60 A B) 100 A C) 150 A D) 200 A Check answer

3. TXJ-D03 · Feeders

   3. In the 2026 NEC, which article contains the dwelling feeder and service load calculations?

   A) Article 120 B) Article 210 C) Article 220 D) Article 230 Check answer

4. TXJ-D04 · Branch circuits and conductors

   4. Unless a specific exception applies, what is the largest overcurrent device permitted to protect 12 AWG copper branch-circuit conductors?

   A) 30 A B) 25 A C) 20 A D) 15 A Check answer

5. TXJ-D05 · Branch circuits and conductors

   5. What is the minimum number of 20-ampere small-appliance branch circuits required for the kitchen countertop and dining-area receptacles of a dwelling unit?

   A) 4 B) 3 C) 2 D) 1 Check answer

6. TXJ-D06 · Wiring methods and materials

   6. Type NM cable run along framing must be secured within ___ of every box and at intervals not exceeding ___.

   A) 12 in and 4½ ft B) 8 in and 3 ft C) 12 in and 6 ft D) 18 in and 6 ft Check answer

7. TXJ-D07 · Wiring methods and materials

   7. Type UF cable for a 240-volt, 30-ampere circuit to a detached workshop is direct-buried under a residential lawn with no concrete or other protective cover. What is the minimum cover?

   A) 6 in B) 12 in C) 18 in D) 24 in Check answer

8. TXJ-D08 · Equipment and devices

   8. Which section of the 2026 NEC requires tamper-resistant receptacles in dwelling units?

   A) 406.26 B) 406.12 C) 210.52 D) 406.4 Check answer

9. TXJ-D09 · Motors and generators

   9. You are sizing the branch-circuit conductors for a general-purpose 3-phase induction motor. Which current do you use?

   A) The full-load amperes on the motor nameplate B) The nameplate current multiplied by 1.15 C) The locked-rotor current D) The full-load current from the NEC motor tables Check answer

10. TXJ-D10 · Special occupancies and equipment

    10. For a permanently installed swimming pool, what is the minimum size of a solid copper equipotential bonding conductor?

    A) 4 AWG B) 6 AWG C) 8 AWG D) 10 AWG Check answer

Part 2: Calculations

Real exam: 26 questions in 110 minutes, about 4.2 minutes each.

1. TXJ-D11 · Definitions, theory and plans

   11. A 30 kW, 480-volt, 3-phase resistive heater is balanced across all three phases. What is the line current?

   A) 20.8 A B) 36.1 A C) 62.5 A D) 108.3 A Check answer

2. TXJ-D12 · Services and service equipment

   12. Using the 2026 NEC standard method, what is the general lighting, small-appliance and laundry load after demand factors for a 2,000 ft² dwelling with the two required small-appliance circuits and one laundry circuit?

   A) 4,925 VA B) 5,625 VA C) 8,500 VA D) 10,500 VA Check answer

3. TXJ-D13 · Services and service equipment

   13. A 200-ampere, 120/240-volt single-phase service supplies the entire load of a one-family dwelling. Terminations are rated 75 °C and no adjustment or correction factors apply. Using the dwelling 83% rule, what is the minimum size of copper THWN-2 service conductors?

   A) 4/0 AWG B) 3/0 AWG C) 2/0 AWG D) 1/0 AWG Check answer

4. TXJ-D14 · Feeders

   14. A feeder supplies 80 A of continuous load and 70 A of noncontinuous load. The overcurrent device is not listed for 100% continuous operation. What is the minimum standard rating of the feeder overcurrent device?

   A) 150 A B) 175 A C) 200 A D) 225 A Check answer

5. TXJ-D15 · Branch circuits and conductors

   15. Six current-carrying 10 AWG copper THHN conductors share one raceway at 30 °C ambient. Starting from the 90 °C column of Table 310.16, what is the adjusted ampacity of each conductor?

   A) 24 A B) 28 A C) 32 A D) 40 A Check answer

6. TXJ-D16 · Branch circuits and conductors

   16. An 8 AWG copper THWN-2 conductor runs through a space where the ambient temperature reaches 45 °C. There are no more than three current-carrying conductors. What is its corrected ampacity?

   A) 55.0 A B) 47.9 A C) 43.5 A D) 41.0 A Check answer

7. TXJ-D17 · Wiring methods and materials

   17. What is the maximum number of 12 AWG THHN conductors permitted in 3/4-inch EMT, all conductors the same size?

   A) 9 B) 11 C) 12 D) 16 Check answer

8. TXJ-D18 · Equipment and devices

   18. A 75 kVA, 3-phase transformer with a 480-volt primary is protected on the primary side only. What is the largest standard primary overcurrent device permitted?

   A) 90 A B) 100 A C) 110 A D) 125 A Check answer

9. TXJ-D19 · Motors and generators

   19. A 25 hp, 460-volt, 3-phase Design B induction motor drives a general-purpose load. What is the minimum ampacity of its branch-circuit conductors?

   A) 85.0 A B) 42.5 A C) 39.1 A D) 34.0 A Check answer

10. TXJ-D20 · Special occupancies and equipment

    20. An electric vehicle supply equipment (EVSE) unit has a maximum load of 48 A. What is the minimum standard rating of its branch-circuit overcurrent device?

    A) 40 A B) 45 A C) 50 A D) 60 A Check answer