- Who Sets CO-ME Eligibility Rules
- Experience-Based Pathway: 10,000 Hours
- Education-Based Pathways
- Required Documentation and Verification
- Exam Format, Fees, and Retest Rules
- What the Domain Weighting Means for Eligible Candidates
- The Correct Application Sequence
- Master License vs. Contractor Registration
- Renewal and Continuing Education
- Frequently Asked Questions
- The experience route requires 10,000 hours over at least five years, including planning, layout, and supervision beyond journeyman work.
- Passing the PSI exam does not waive Colorado's experience and education requirements - DORA still reviews your full application.
- The exam is 90 scored questions in 240 minutes, and you need 70% (63 correct) overall, not per domain.
- Grounding and Bonding carries 14 scored questions, the single largest domain on the CO-ME exam.
Who Sets CO-ME Eligibility Rules
Colorado Master Electrician licensing sits under the Colorado State Electrical Board, part of the Colorado Department of Regulatory Agencies (DORA). The board sets the experience, education, and examination requirements, while the actual test - often just called the CO-ME exam - is administered by PSI Services LLC on computer at PSI-approved test centers. Understanding this split matters: DORA controls whether you're eligible to sit for the exam and whether you can be licensed afterward, while PSI controls exam scheduling, content delivery, and score reporting.
Eligibility for CO-ME isn't a single checkbox. Colorado offers more than one route to qualify, and each has its own documentation trail. Before you spend time or money on exam preparation, it's worth confirming which pathway applies to you, because the wrong assumption here can delay your application by months.
Experience-Based Pathway: 10,000 Hours
The most common route to CO-ME eligibility is the experience-based master pathway. This requires 10,000 hours of qualifying electrical work completed over at least five years. That five-year floor is a hard minimum - you can't compress 10,000 hours into fewer calendar years and expect it to satisfy the board.
Critically, this isn't just journeyman-level wiring time. Colorado requires that a meaningful portion of those hours include work beyond standard journeyman duties, specifically:
- Planning - laying out electrical systems before installation, not just executing someone else's plan
- Layout - determining conductor routing, panel placement, and equipment positioning
- Supervision - overseeing other electricians or crews on a project
This is the distinction between a journeyman license and a master license: the board wants evidence you've been making decisions, not just following them. If your work history is heavy on installation but light on planning or supervisory responsibility, you may need to document those experiences more carefully or seek out projects that build that record before applying.
Why Experience Requirements Connect to Exam Content
The hours requirement isn't just a bureaucratic hurdle - it's meant to ensure you've actually encountered the situations the exam tests. Someone who has planned and supervised installations will have practical exposure to load calculations, service sizing, and grounding decisions that show up throughout the exam's 13 content domains.
- Planning experience maps directly to Domain 13 (Electrical Calculations) and Domain 2 (Services, Feeders, and Branch Circuits)
- Supervisory experience often exposes candidates to Domain 8 (Special Occupancies) and Domain 9 (Special Equipment) situations less common in day-to-day journeyman work
Education-Based Pathways
Not every candidate reaches eligibility through hours alone. Colorado also recognizes education-based pathways for two groups:
- Electrical-engineering graduates from qualifying programs, whose academic training substitutes for a portion of practical field experience
- Approved trade-school or community-college graduates whose electrical program has been reviewed and accepted by the state board
These pathways don't eliminate the need for real-world exposure to the exam's content - they simply provide an alternate route to satisfying the eligibility threshold. Candidates using an education-based pathway still need to submit transcripts and, in most cases, some verified field experience, so it's worth contacting the Electrical Board directly to confirm exactly how your specific program and work history combine before you schedule anything with PSI.
Key Takeaway
If you're weighing whether an approved program qualifies, don't guess - verify with DORA's Electrical Board before submitting fees or scheduling your exam date. Pathway mistakes are far more costly to fix after the fact than before.
Required Documentation and Verification
Whichever pathway you use, Colorado requires supporting paperwork before your application is considered complete:
- Employer or master experience verification - signed documentation from a licensed master electrician or employer confirming your hours, dates, and the nature of your work (planning, layout, supervision)
- Applicable education transcripts - official transcripts if you're using an electrical-engineering or approved trade-school/community-college pathway
Gather this documentation early. Verification forms often require signatures from supervisors who may have moved on to other companies, so tracking down accurate records for hours worked five, six, or seven years ago can take longer than expected. Start this process well before you plan to sit for the exam, not after.
Exam Format, Fees, and Retest Rules
Once your eligibility is established, the exam itself is a computer-based, multiple-choice test administered through PSI. The scored portion consists of 90 questions in 240 minutes. PSI may also include up to 10 unscored (pretest) questions, for which you receive an additional 30 minutes - those questions don't count toward your result but are indistinguishable from scored ones during the test.
To pass, you need 70% correct, or 63 of the 90 scored questions. There is no domain-by-domain passing threshold - a strong performance in one heavily weighted area can offset a weaker showing elsewhere, as long as your overall score clears 63 correct answers.
| Exam Element | Detail |
|---|---|
| Scored questions | 90 |
| Time for scored questions | 240 minutes |
| Unscored (pretest) questions | Up to 10 |
| Additional time for unscored items | 30 minutes |
| Passing score | 70% (63 of 90 correct) |
| Initial exam fee | $78 |
| Retest fee | $73 |
Reference materials are tightly controlled. The test center supplies the NEC codebook and a formula page - you cannot bring your own copies, and the supplied book cannot be written in, highlighted, underlined, or tabbed/indexed in any way. An onscreen calculator is provided for computations. This matters for your prep strategy: you need to be fast at navigating a clean, unmarked NEC under time pressure, since the flagging and tabbing tricks many electricians rely on in the field aren't available on test day.
As of the PSI bulletin updated June 18, 2026, the exam references the NEC 2026 code cycle effective August 1, 2026. If you're studying from an older code edition, verify your materials align with the current cycle before investing significant prep time - code section numbers and requirements can shift between editions in ways that directly affect scored questions. For a full breakdown of exact scoring mechanics, see our CO-ME passing score guide.
What the Domain Weighting Means for Eligible Candidates
Once you've confirmed your eligibility path, it helps to understand how the exam content is distributed across Colorado's 13 official domains. This isn't generic exam trivia - it's a direct map of where your 240 minutes of scored questions will go:
Domain 3: Grounding and Bonding - 14 questions
This is the single largest domain on the exam by a meaningful margin. Candidates should be fluent in grounding electrode systems, bonding jumpers, and the distinctions between grounding and bonding requirements across different installations.
- Expect this domain to carry more weight than any other single content area
Domain 2: Services, Feeders, and Branch Circuits - 11 questions
The second-largest domain. Candidates who came up through the experience pathway with heavy planning and layout responsibility often have a natural advantage here, since service sizing and feeder calculations are core to that work.
- Load calculations and conductor sizing are frequent touchpoints
The remaining 11 domains - General Electrical Knowledge (6), Overcurrent Protection (5), Conductors and Cables (4), Raceways and Boxes (5), Special Conditions (2), Special Occupancies (9), Special Equipment (9), Electrical Devices (4), Motors (8), Transformers (4), and Electrical Calculations (9) - round out the remaining 76 scored questions. Special Conditions is notably light at just 2 questions, so don't let it consume disproportionate study time relative to Grounding and Bonding or Services, Feeders, and Branch Circuits. For a domain-by-domain study breakdown, see the complete domains guide, and if you're trying to gauge overall difficulty relative to your experience level, our exam difficulty guide walks through what candidates typically find challenging.
Anchor on the two heaviest domains
- Build fluency in Grounding and Bonding (14 questions) and Services, Feeders, and Branch Circuits (11 questions) before anything else
- Practice locating grounding electrode and bonding jumper requirements in an unmarked NEC, since you won't have tabs on exam day
Cover the mid-weight domains
- Work through Special Occupancies, Special Equipment, Electrical Calculations, and Motors - each carries 8 or 9 scored questions
- Time yourself using the supplied-style NEC and formula page to simulate the onscreen calculator experience
Fill in lighter domains and full-length practice
- Review Overcurrent Protection, Raceways and Boxes, General Electrical Knowledge, Conductors and Cables, Transformers, Electrical Devices, and Special Conditions
- Run full 240-minute practice sessions to build endurance across all 90 scored questions
The Correct Application Sequence
One of the most misunderstood pieces of the CO-ME process is the order of operations. Colorado requires candidates to pass the PSI examination before submitting the DORA license application. You don't apply for the license first and then take the exam - the sequence runs the other way. However, remember that passing the exam is only one leg of the stool; your experience or education documentation still has to be submitted and reviewed separately. Passing the exam early doesn't fast-track or waive that review.
Practically, this means you should confirm your eligibility pathway and gather your experience verification or transcripts before you register with PSI. There's little value in passing the exam months or years before you can actually document your 10,000 hours or education credential, since exam results don't extend indefinitely in most licensing frameworks. Check current scheduling windows through our exam dates and scheduling guide so your test date lines up with your documentation timeline.
Master License vs. Contractor Registration
A frequent point of confusion: the individual Master Electrician license and electrical contractor registration are two separate things in Colorado. Passing the CO-ME exam and obtaining your master license qualifies you individually - it does not automatically register a business entity as an electrical contractor. If you plan to run your own contracting business, you'll need to pursue contractor registration separately, in addition to holding your individual master license. Don't conflate the two when planning your career timeline or budgeting for licensing costs.
Renewal and Continuing Education
Once licensed, your Master Electrician credential doesn't sit static. Active licenses renew every three years, and renewal requires 24 continuing-education hours completed during that cycle. Within those 24 hours:
- At least 4 hours must cover NEC changes
- No more than 4 hours may count toward safety topics (safety hours are capped, not just recommended)
There's one notable exception: the first renewal following a license issued by examination is exempt from the CE requirement. That exemption applies only to the initial renewal cycle right after you pass - every renewal after that requires the full 24 hours. Keep your CE completion records on file for seven years, since the board can request documentation well after a given renewal cycle closes.
If you're still deciding whether pursuing this license is the right move for your career, our ROI analysis and earnings guide can help you weigh the licensing investment against long-term outcomes. And once you've confirmed eligibility and are ready to start preparing in earnest, ../ offers practice testing built around these exact domain weightings so you're not guessing which topics deserve the most attention.
Frequently Asked Questions
You need to satisfy Colorado's eligibility pathway - either the 10,000-hour experience route over at least five years, or an approved education pathway - before your application to sit for the exam is accepted. Confirm your specific status with the Colorado State Electrical Board before registering with PSI.
No. Passing the PSI exam is required before you submit your DORA license application, but it does not waive the experience or education documentation requirements. You still need to submit employer/master experience verification and, if applicable, education transcripts.
Colorado's passing standard applies to the exam overall - 70%, or 63 of the 90 scored questions correct - rather than requiring a separate passing score within each of the 13 domains.
No. The test center supplies the NEC and a formula page. Personal reference materials are prohibited, and the supplied book cannot be written in, highlighted, underlined, or indexed. An onscreen calculator is provided for calculations.
No. Electrical contractor registration is separate from the individual Master Electrician license. Passing the CO-ME exam and holding the master license qualifies you individually; running a contracting business requires separate contractor registration.