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Key Facts: CO Electrician Exam
70%
Passing Score
DORA / PSI
90
Scored Questions
240-minute limit
$78
Exam Fee
PSI
NEC 2026
Code Edition
3 CCR 710-1
PSI administers the Colorado Journeyman Wireman examination for the DORA State Electrical Board: 90 scored questions in 240 minutes, with up to 10 unscored items and 30 additional minutes. The passing score is 70% (63 of 90 scored items). Follow the current bulletin for the supplied codebook, formula page and registration instructions; passing does not guarantee licensure.
Sample CO Electrician Practice Questions
Try these sample questions to review concepts for the CO Electrician exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 313+ question experience with AI tutoring.
1According to the NEC 2023 as adopted by Colorado, what is the definition of a 'branch circuit'?
2Under Colorado's NEC 2023 adoption, what is the definition of a 'continuous load'?
3Per the NEC 2023 as adopted in Colorado, what is the minimum headroom required for working spaces about electrical equipment rated 600V or less?
4According to the NEC 2023 adopted by Colorado, what is the required working space width in front of electrical equipment?
5Per NEC 2023 in Colorado, what is the minimum depth of working space for Condition 1 at 0-150V to ground?
6In Colorado, what is the minimum trade size for EMT per the NEC?
7Per the NEC 2023 adopted in Colorado, what is the maximum height for the center of a disconnect handle?
8Per NEC 2023 in Colorado, what is the maximum flexible cord length for a garbage disposal?
9Under Colorado's NEC adoption, what is the minimum conductor size for a 20-ampere branch circuit?
10Per the NEC 2023 in Colorado, what is the minimum conductor size for a 15-ampere branch circuit?
About the CO Electrician Exam
The Colorado Journeyman Wireman exam is administered by PSI under the DORA State Electrical Board. It tests the National Electrical Code across grounding and bonding, wiring methods, conductors, services, overcurrent protection, motors, transformers, special occupancies, photovoltaics and electrical calculations.
Exam sponsor: Colorado DORA State Electrical Board. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
90 questions
Time Limit
240 minutes for 90 scored items, with up to 10 unscored items and 30 additional minutes as specified by PSI.
Passing Score
70%
Reported exam pass rate: not published. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Official sources
Our practice resources: topics covered
We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.
Grounding & Bonding
Article 250 electrode systems, bonding jumpers, EGC sizing, separately derived systems
General Electrical Knowledge
Article 100 definitions, Article 110 requirements, working space, theory
Electrical Calculations
Electrical calculations: use the current PSI outline and authorized reference rather than assuming legacy section numbering.
Services, Feeders & Branch Circuits
Articles 210, 215, 225 and 230 branch circuits, feeders and services
Conductors & Cables
Article 310 ampacity, correction and adjustment factors, cable assemblies
Special Equipment
Pools and spas, generators and transfer equipment, other Chapter 6 equipment
Motors
Article 430 FLC tables, conductors, overload, short-circuit protection, controllers
Overcurrent Protection
Article 240 standard ratings, conductor protection, feeder and transformer taps
Special Occupancies
Hazardous (classified) locations, health care facilities, places of assembly
Electrical Devices
Receptacles, switches, GFCI and AFCI devices, panelboards and switchboards
Raceways & Boxes
Raceways, wireways, auxiliary gutters, cable trays, boxes and enclosures
Transformers
Article 450 overcurrent protection, installation, ventilation and grounding
Photovoltaics
Articles 690, 705 and 706 PV systems, interconnection and energy storage
Preparing for the CO Electrician Exam
What You Need to Know
- Passing score: 70%
- Exam length: 90 questions
- Time limit: 240 minutes for 90 scored items, with up to 10 unscored items and 30 additional minutes as specified by PSI.
- Exam / certification fees: $78 ($73 retake) Official sources
Using Our Practice Resources
- Work through all 313 available questions
- Review every answer and explanation
- Track weak areas and revisit them
- Use our AI tutor for tough concepts
CO Electrician: Suggested Study Strategy
Frequently Asked Questions
What NEC edition does Colorado use?
Colorado incorporates the 2026 National Electrical Code under Board Rule 3 CCR 710-1, effective August 1, 2026. PSI examinations given on or after that date are consistent with the 2026 NEC.
Who administers the Colorado electrician exam?
PSI administers the examination for the DORA State Electrical Board. Follow PSI's current registration instructions; after passing, complete DORA's license application and documentation requirements. Passing the exam does not guarantee licensure.
What is SB 25-165?
Senate Bill 25-165, Licensure of Electricians, was signed June 3, 2025 and took effect August 6, 2025. It defines photovoltaic electrical work, requires photovoltaic installers to register with the Board by December 31, 2026, and widens the window for the 288-hour training requirement from four years to eight.
What experience is required?
8,000 hours of electrical construction wiring experience over no less than four years, including 2,000 hours over no less than two years of commercial or industrial work, plus 288 hours of classroom electrical training.