Colorado Journeyman Wireman NEC 2023 exam preparation



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Colorado Journeyman Wireman Exam Preparation is our specialty since 1972. School enrollment is complete with Home Study Computer Program, Tutoring, and Live Seminars with real questions, answers, code references, and calculations to prepare you for the actual PSI state licensing exam.

Custom Home Study Computer Program running on your personal PC

Our sample exams simulate your actual PSI state exam!

Below are a few questions from your upcoming PSI state exam:

  1. What would be the calculated the voltage drop on the #6 AWG copper conductors that serve a 15 HP, 480 V three-phase motor? (Assume the voltage source and the load are 150 feet apart installed in rigid metal conduit.)
    • Correct Answer: NEC – Table 430.250, Chapter 9 Table 8 (Conductor Properties), and Voltage Drop formula. See calculation steps below.
      1. Per Table 430.450 the FLC for the 15 HP 480 V motor is 21 amperes.
      2. Per Chapter 9 Table 8 the #6 AWG Circular mils is 26240.
      3. Use the Voltage Drop Formula, Vd = (1.732 x K x Length x Ampacity) / kcmil, Vd = (1.732 x 12.9 x 150 feet x 21 amps) / 26240 = 2.68 Volts.
  2. What is the minimum required feeder tap conductor size for a circuit protected by an 800 ampere OCP device, where the length of the tap conductors is 20 feet, using copper THWN wire?
    • Correct Answer: NEC – 240.21(B)(2)(1) Therefore, calculate; 800 amperes / 3 = 266 amperes, then use Table 310.15(B)(16) 75-degree C (THWN) column to size the feeder tap as 300 kcmil.
  3. The ampere rating of a feeder that supplies a continuous lighting load and a motor load shall be how many amperes when the lighting load is equivalent to 39 amperes and the motor load is equivalent to 24 amperes?
    • Correct Answer: 430.22, and 600.5(B) Therefore, calculate the total load by: 39 amperes + 24 amperes = 63 amperes, then multiply by 125%. 63 amperes x 1.25 = 78.75 amperes.

The NEC Codebook and all reference materials are all provided by PSI at the exam testing location. Do NOT bring your personal NEC, but do bring two valid forms of identification.

    • NEC 2023

Our interactive Exam Prep Program allows each license candidate to prepare and study for his state examination while in the comfort of his own home. Our practice exams actually simulate the experience of taking the computerized state examination. The questions, multiple choice answers, and article references have been professionally prepared by our research team to cover every subject area, code section, and calculations. Our sample tests questions are scrambled each time you test to simulate your actual state test experience.

This excellent program can be purchased and installed in just minutes, allows unlimited study and review time for a three month period, and runs on any Windows or Mac computer with an operating system. The program will run on your laptop without internet access allowing on-the-go study preparation.

Candidates for state licensure must now pass an exam administered by PSI prior to submitting an application for licensure. See the recommended steps listed below:

    1. Study to pass your state exam on the first try with our Home Study Computer Program (Click ADD TO CART above)
    2. Register to take your exam online at or call (855) 898-0710
    3. Schedule an appointment to take the examination with PSI
    4. Take and pass the state exam
      • You must bring two valid forms of identification
      • Arrive 30 minutes prior to the scheduled examination appointment.
    5. File a license application with the Board at

Colorado Division of Professions and Occupations Online Services (DORA):

Electrical web address:
State Electrical Board, 1560 Broadway, Suite 1350, Denver, CO 80202. (303) 894-7800

Why Wait? Call Daniela Today! (303) 916-0020