Free CO Electrician Exam Prep
Colorado Journeyman Electrician License Exam (DORA / PSI)
Prepare for the CO Electrician exam without spending hundreds on expensive prep courses. Free study guides, practice questions, flashcards, and related exam resources.
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Colorado Electrician License: Study Roadmap
Follow this path to organize your exam preparation
Colorado Law, PSI Logistics & NEC NavigationYou are here
Learn the C.R.S. Title 12 Article 115 licensing rules, the three-apprentice supervision limit, and how to navigate the unmarked 2026 NEC that PSI hands you at the test center.
Wiring Methods, Conductors & Grounding
Work Chapter 3 wiring methods, Table 310.16 ampacity with correction and adjustment factors, and Article 250 grounding and bonding - the heaviest single subject area at 14 items.
Branch Circuits, Services & Load Calculations
Study branch circuits, services, feeders and load calculations using the edition required by the current PSI bulletin; verify edition-specific section numbers and demand rules in the authorized reference.
Motors, Special Occupancies & Timed Practice
Cover Article 430 motor circuits, transformers, hazardous locations, health care, pools and photovoltaics, then run full 90-item timed simulations at PSI pacing.
Can You Take the CO Electrician Exam?
Check if you meet the basic eligibility requirements
- •For apprentice work, complete the Board registration process with your employer; the employer must register the apprentice within 30 days after employment begins. Apprentices must work under direct supervision.
- •Document all practical experience on the Board's Affidavit of Experience form, signed by the supervising electrical contractor
- •Apply for licensure through DORA and provide the required experience and classroom-training documentation.
- •Follow the current PSI registration instructions; after passing, complete the DORA license application requirements.
CO Electrician Quick Facts
Time to Get Licensed
From start to license in hand
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Free CO Electrician Prep Tools
Reported exam pass rate: The Colorado State Electrical Board and PSI do not publish pass rates for the Colorado journeyman electrician examination.. These figures describe exam candidates, not OpenExamPrep user outcomes. Check the exam sponsor’s website for published statistics.
Free Practice Questions
Independent practice on electrical concepts; verify current edition-specific requirements against the authorized exam reference.
AI-Powered Learning
Get instant explanations and targeted help on grounding, wiring methods, and load calculations
Check the Current Exam Reference
PSI examinations use the 2026 NEC from August 1, 2026. Verify current reference and test-center instructions before testing; legacy practice is not a certification of current-code compliance.
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What You'll Study
14 chapters covering the exam topics in this guide
Chapter 1: Colorado Electrical Licensing Laws, DORA Rules & Exam Logistics
4 sections
Chapter 2: Electrical Theory, Mathematics & Fundamental Concepts
4 sections
Chapter 3: General Installation Requirements — NEC Articles 90 & 110
4 sections
Chapter 4: Branch Circuits & Feeders — NEC Articles 210, 215 & 225
4 sections
Chapter 5: Services & Overcurrent Protection — NEC Articles 230, 240 & 242
4 sections
Chapter 6: Grounding and Bonding — NEC Article 250 Part I (Systems & Electrodes)
4 sections
Chapter 7: Grounding and Bonding — NEC Article 250 Part II (Equipment & Special Systems)
4 sections
Chapter 8: Wiring Methods & Materials — NEC Chapter 3
4 sections
Chapter 9: Conductors, Ampacity & Wire Sizing — NEC Article 310
4 sections
Chapter 10: Box Fill, Conduit Fill & Pull Box Calculations
4 sections
Chapter 11: Load Calculations — Dwellings & Commercial Buildings — NEC Article 120
4 sections
Chapter 12: Motors, Motor Circuits & Controllers — NEC Article 430
4 sections
Chapter 13: Transformers, Distribution & Utilization Equipment
4 sections
Chapter 14: Special Occupancies, Renewable Energy & Modern Technologies
4 sections
CO Electrician Exam Details
Colorado Journeyman Electrician License Exam (DORA / PSI)
Administered by Colorado DORA State Electrical Board
Exam Content Breakdown
Based on the official Colorado DORA State Electrical Board content outline
Article 250 grounding electrode systems, bonding jumpers, equipment grounding conductors, separately derived systems, and separate structures.
Article 100 definitions, Article 110 general requirements and working space, electrical theory, and Ohm's law and three-phase fundamentals.
Electrical calculations in the current PSI outline; verify load assumptions, section numbers and applicable requirements in the authorized reference.
Articles 210, 215, 225 and 230 covering branch-circuit ratings, required outlets, feeders, service conductors and service disconnects.
Article 310 conductor properties and ampacity, temperature correction and bundling adjustment, and Chapter 3 cable assemblies.
Pools and spas, generators and transfer equipment, signs, and other Chapter 6 special equipment.
Article 430 motor full-load current tables, conductor sizing, overload protection, short-circuit protection, disconnects and controllers.
Article 240 standard ratings, conductor protection, the next-size-up rule, and feeder and transformer tap rules.
Chapter 5 hazardous (classified) locations, health care facilities, places of assembly and similar occupancies.
Receptacles, switches, GFCI and AFCI devices, panelboards and switchboards under Articles 404, 406 and 408.
Chapter 3 metallic and nonmetallic raceways, wireways, auxiliary gutters, cable trays, and box and enclosure requirements.
Article 450 transformer overcurrent protection, installation, ventilation and grounding.
Articles 690, 705 and 706 photovoltaic systems, interconnection and energy storage.
What's Included
14 Chapters
Complete exam coverage
Practice Quizzes
With detailed explanations
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What's Next After the CO Electrician?
After passing the CO Electrician, you can pursue these career paths
Colorado Master Electrician
Progress from journeyman to Colorado Master Electrician after documenting at least 2,000 hours (1 year) of planning, layout and supervision experience beyond the journeyman requirements, qualifying to serve as the responsible master for a registered Colorado electrical contractor.
Colorado Electrical Contractor
Register an independent electrical contracting business with the DORA State Electrical Board by employing or qualifying as a licensed Colorado Master Electrician and submitting evidence of compliance with Colorado workers' compensation and unemployment insurance laws.
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