- The CO-ME passing score is 70%, or 63 of 90 scored questions correct.
- There is no separate pass requirement per domain - only the overall 63-correct threshold matters.
- Grounding and Bonding carries 14 scored questions, the single largest domain on the exam.
- You get 240 minutes for scored items, plus up to 30 extra minutes if unscored pretest items appear.
The Exact Passing Score
If you only remember one number from this article, make it this: 70%, or 63 correct answers out of 90 scored questions. That's the passing score PSI Services LLC uses to administer the Colorado Master Electrician License Exam on behalf of the Colorado State Electrical Board and the Department of Regulatory Agencies (DORA). There's no rounding trick, no curve, and no bonus credit for effort - 63 correct scored responses is the line between a pass and a retest.
Notice the phrase "scored questions." The exam includes up to 10 additional unscored questions mixed in, for a possible 100 total items, but those unscored questions don't count toward your 63-correct target and don't count against you either. They exist so PSI can field-test new content for future versions of the exam.
How PSI Scores the CO-ME Exam
The Colorado Master Electrician License Exam is a computer-based, multiple-choice test. Candidates get 240 minutes to answer 90 scored questions. If your test form includes unscored pretest items - up to 10 of them - you receive an additional 30 minutes, for a maximum session of 270 minutes. You won't know which questions are scored and which are experimental, so the only reasonable strategy is to treat every question on the screen as if it counts.
Because the exam references the NEC 2026 edition effective August 1, 2026 (per the PSI bulletin updated June 18, 2026), your prep materials and code references need to match that cycle. Studying from an outdated code book is one of the fastest ways to miss questions that have nothing to do with your electrical knowledge and everything to do with a renumbered article or a revised table.
For a deeper walkthrough of exam logistics - scheduling windows, fee deadlines, and what to expect on test day - see CO-ME Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Scored Questions by Domain
The 90 scored questions aren't spread evenly across the 13 content domains. Some domains carry real weight; others are worth just a couple of points. Knowing this breakdown before you build a study schedule is arguably more valuable than knowing the passing score itself, because it tells you where your study hours actually pay off.
| Domain | Scored Questions |
|---|---|
| 1. General Electrical Knowledge | 6 |
| 2. Services, Feeders, and Branch Circuits | 11 |
| 3. Grounding and Bonding | 14 |
| 4. Overcurrent Protection | 5 |
| 5. Conductors and Cables | 4 |
| 6. Raceways and Boxes | 5 |
| 7. Special Conditions | 2 |
| 8. Special Occupancies | 9 |
| 9. Special Equipment | 9 |
| 10. Electrical Devices | 4 |
| 11. Motors | 8 |
| 12. Transformers | 4 |
| 13. Electrical Calculations | 9 |
Grounding and Bonding is the single largest domain at 14 questions - more than 15% of the entire scored exam sitting in one content area. Services, Feeders, and Branch Circuits comes in second at 11 questions. Together, those two domains alone account for 25 of the 63 correct answers you need to pass. Special Equipment, Special Occupancies, and Electrical Calculations tie for third-largest at 9 questions each.
Grounding and Bonding
As the heaviest-weighted domain, this section deserves disproportionate study time relative to its single-topic feel. Candidates need fluency with grounding electrode systems, bonding jumpers, equipment grounding conductor sizing, and the distinctions between grounded and grounding conductors.
- Grounding electrode conductor sizing tables
- Bonding requirements for metal piping and structural steel
- Separately derived system grounding
Services, Feeders, and Branch Circuits
This domain tests your ability to size and lay out the backbone of an electrical system - the part of the job a master electrician is specifically licensed to plan and supervise.
- Service and feeder conductor sizing
- Load calculations for branch circuits
- Disconnecting means placement and rating
For a full breakdown of every domain - not just the biggest two - read CO-ME Exam Domains 2026: Complete Guide to All 13 Content Areas. It maps each of the 13 areas to specific NEC articles and typical question phrasing.
Why There's No Per-Domain Minimum
Here's a detail that changes how smart candidates prioritize their remaining study time in the final weeks: passing requires 70% across the exam as a whole, not a separate passing score in each domain. You could theoretically miss every single question in Special Conditions (only 2 points available anyway) and still pass comfortably if you're strong everywhere else.
Key Takeaway
Don't spread your remaining prep hours evenly across all 13 domains in the final stretch. Shore up your weakest performance in the heavily-weighted domains - Grounding and Bonding, Services/Feeders/Branch Circuits, Special Occupancies, Special Equipment, Electrical Calculations, and Motors - before spending more time polishing a 2-question domain like Special Conditions.
That said, "no per-domain minimum" doesn't mean you can skip a domain entirely. Skipping Motors (8 points) or Electrical Calculations (9 points) to over-study a smaller domain is a losing trade. The math only works in your favor when you're reallocating time away from low-weight domains toward high-weight ones - never the reverse.
What You Can - and Can't - Bring to the Table
The passing score assumes you're working under specific reference conditions, and misunderstanding them can cost you points you otherwise would have earned. The PSI test center supplies your copy of the NEC and a formula reference page for use during the exam. You may not bring your own code book, notes, or calculator.
- The supplied NEC book cannot be written in, highlighted, underlined, or indexed with tabs
- Personal reference materials of any kind are prohibited
- An onscreen calculator is provided within the testing software
This means part of your prep has to include practicing navigation of an unmarked code book under time pressure. If your normal study habit relies on a heavily tabbed and highlighted NEC, you'll need to retrain that muscle before test day - a clean book at the test center behaves very differently from your annotated copy at home.
Passing the Exam Isn't the Whole Application
A passing score of 63 or higher is a required step, but it is not the same thing as holding a Colorado master electrician license. DORA's process still requires candidates to satisfy experience and education requirements independent of the exam result - passing PSI's test does not waive them.
Most candidates qualify through the experience-based route: 10,000 hours over at least five years, including planning, layout, and supervision experience beyond what's expected at the journeyman level. Others qualify through education-based pathways available to electrical-engineering graduates or graduates of approved trade schools and community college programs. Either way, you'll need to submit employer or master-level experience verification, and education pathways require transcripts.
It's also worth remembering that an individual master license is separate from electrical contractor registration - passing the exam and holding a license doesn't automatically register you as a contractor. For the complete eligibility picture, including which documentation to gather before you even schedule your exam date, see CO-ME Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Key Takeaway
Line up your experience verification and any required transcripts before your exam date, not after. A passing score with incomplete paperwork still leaves you without a license.
Turning 63 Correct Into a Study Plan
Once you know the target - 63 of 90 - the smartest way to plan is backward from the domain weight table above, not from a generic week-by-week template. That said, a rough structure still helps candidates who are studying alongside a full-time electrical job.
Highest-Weight Domains
- Grounding and Bonding (14 points) - grounding electrode systems, bonding jumpers, GEC sizing
- Services, Feeders, and Branch Circuits (11 points) - load calculations, conductor sizing, disconnects
Mid-Weight Domains
- Special Occupancies and Special Equipment (9 points each)
- Electrical Calculations (9 points) and Motors (8 points)
Remaining Domains and Timed Practice
- General Electrical Knowledge, Overcurrent Protection, Raceways and Boxes, Conductors and Cables, Electrical Devices, Transformers, Special Conditions
- Full-length timed practice runs to simulate the 240-minute session
Because there's no per-domain passing requirement, this order isn't arbitrary - it's designed so your first two weeks cover 25 of the 63 correct answers you need, before you even touch the medium-weight domains. For a fuller methodology, including how to structure daily review sessions and practice-question rotation, read CO-ME Study Guide 2026: How to Pass on Your First Attempt.
Timed, full-length practice under real exam conditions - no tabs, no highlighter, an unmarked code reference - is one of the best predictors of whether you'll clear 63 correct on test day. You can run realistic practice sessions at our CO-ME practice test platform before committing to an exam date.
If You Don't Hit 63
A score below 63 correct means a retest, at a retest fee of $73 (compared to the $78 initial exam fee). Before you schedule again, it's worth understanding two things: how the difficulty of specific domains compares to your actual weak spots, and what the realistic range of outcomes looks like for candidates retaking the exam.
How Hard Is the CO-ME Exam? Complete Difficulty Guide 2026 breaks down where candidates typically lose points, while CO-ME Pass Rate 2026: What the Data Shows looks at what the available data actually shows about first-attempt and retest outcomes. If cost is a factor in your decision to retest versus wait, CO-ME Certification Cost 2026: Complete Pricing Breakdown lays out every fee in the process, not just the exam itself.
A quick review with CO-ME Cheat Sheet 2026: One-Page Review of Must-Know Facts the week before a retest can help lock in the numbers - passing score, fees, question counts, domain weights - so exam-day nerves don't cost you points on facts you already know.
FAQ
70%, which equals 63 correct answers out of 90 scored questions. The exam may include up to 10 additional unscored questions that don't count toward this total.
No. Passing is based on your overall score across all 90 scored questions, not on hitting a minimum in each of the 13 domains individually.
240 minutes for the scored questions. If your form includes unscored pretest items, you receive up to 30 additional minutes, for a maximum session of 270 minutes.
No. The test center supplies the NEC and a formula reference page. Personal materials are prohibited, and the supplied book cannot be written in, highlighted, underlined, or indexed.
Grounding and Bonding, with 14 of the 90 scored questions - the largest single domain on the exam, followed by Services, Feeders, and Branch Circuits at 11.
No. Passing is required before submitting the DORA license application, but it doesn't waive the experience-based (10,000 hours over five years) or education-based requirements.