- A TN-EC is the Tennessee Electrical (CE) Contractor Examination, required for the statewide CE license.
- The open-book exam has 100 questions, a 5-hour limit, and a 73% passing score.
- Wiring and Protection is the heaviest domain at 23%, followed by Wiring Methods and Materials at 15%.
- Prov administers the exam ($53 per attempt) at test centers or via remote Examroom proctoring.
What Is a TN-EC?
A TN-EC is the Tennessee Electrical (CE) Contractor Examination - the credentialing test that the Tennessee Board for Licensing Contractors requires before it will issue the statewide Electrical (CE) contractor classification. If you're asking "what is a TN-EC" because you're planning to bid and perform covered electrical work in Tennessee, this is the exam standing between you and that license. It's not a certificate you frame for a resume; it's a gatekeeping exam tied directly to a specific business classification that lets a contractor legally take on electrical projects generally valued at $25,000 or more.
It's worth being precise about the acronym, because "TN-EC" gets used loosely online. In this context, TN-EC refers exclusively to the Tennessee Electrical (CE) Contractor Examination administered under the state's contractor licensing framework - not any national electrician certification and not the Limited Licensed Electrician pathway, which is a separate, narrower track. If you want the short definitional version of this topic, see What Is TN-EC? or TN-EC Meaning for a quick breakdown of the term itself.
Who Governs the CE Classification
The Tennessee Board for Licensing Contractors is the licensing authority behind the CE classification. Since July 1, 2026, new exam appointments for the TN-EC have been scheduled and administered through Prov, the testing vendor the Board contracts with. The current Prov candidate bulletin is dated July 13, 2026, and it lays out the exam blueprint, references, scheduling process, and score reporting rules that every applicant needs to follow.
This matters practically: your exam registration, fee payment, scheduling, and score results all run through Prov's system rather than directly through the Board. The Board handles the licensing side - application review, experience verification, insurance, and the actual license issuance - after you've passed the exam. Understanding this split helps explain why two separate fee structures exist (exam fee vs. application fee), which we break down later in this article and in more depth at TN-EC Certification Cost 2026: Complete Pricing Breakdown.
Exam Format and Registration Mechanics
The TN-EC is a computer-based, multiple-choice exam, and it's open-book - meaning you're allowed to bring or access approved reference materials during the test rather than working purely from memory. Here's the structural breakdown:
- 100 questions, all multiple-choice
- 5-hour time limit
- 73% passing score
- $53 Prov fee per attempt
- Delivery via test center or remote Examroom proctoring, giving candidates flexibility in how they sit for the exam
Because it's open-book, the exam leans on your ability to locate and apply information quickly under time pressure rather than pure recall. The four listed references are the 2017 National Electrical Code, Ugly's Electrical References (2020), OSHA 29 CFR Part 1926, and the American Electricians' Handbook, 17th Edition. Knowing how to navigate these four books - tabbing them, indexing them, practicing lookups - is arguably as important as knowing the content itself, since a 5-hour window across 100 questions leaves limited time for fumbling through an unfamiliar table of contents.
Exam scores are typically valid for two years, so the exam-pass-to-license-application timeline isn't indefinite. If you want the exact scoring mechanics spelled out further, TN-EC Passing Score 2026: Exactly What You Need to Pass covers how the 73% threshold applies across the question set.
Key Takeaway
Since this is open-book, spend prep time practicing how fast you can find answers in the 2017 NEC and the other three references - not just what the answers are.
The 12 Content Domains
The TN-EC blueprint spans twelve domains, and they are not weighted equally. Two domains carry disproportionate weight and deserve the bulk of your attention:
Domain 4: Wiring and Protection - 23%
This is the single largest domain on the exam, covering nearly a quarter of all questions. Candidates need command of overcurrent protection, conductor sizing, grounding and bonding, and circuit protection rules as defined in the 2017 NEC.
- Practice locating protection tables quickly in the code book
- Understand how grounding/bonding rules interact with equipment covered elsewhere on the exam
Domain 5: Wiring Methods and Materials - 15%
The second-heaviest domain, focused on conductor types, raceway systems, box and enclosure requirements, and installation methods.
- Know which wiring methods apply to which occupancy types
- Be comfortable cross-referencing materials rules against the American Electricians' Handbook
The remaining ten domains - General Electrical Knowledge, Plan Reading, Code Reading, Equipment for General Use, Motors and Controls, Communication Systems, Special Occupancy, Special Equipment, Hazardous Locations, and OSHA Safety - round out the rest of the blueprint. Plan Reading and Code Reading test your ability to interpret drawings and navigate the code structure itself, separate from applying specific rules. Hazardous Locations and OSHA Safety pull directly from OSHA 29 CFR Part 1926, so treat that reference as more than background reading.
For a full breakdown of what each of the twelve domains actually tests and how to sequence your review of them, see TN-EC Exam Domains 2026: Complete Guide to All 12 Content Areas.
| Domain | Approx. Weight |
|---|---|
| Wiring and Protection | 23% |
| Wiring Methods and Materials | 15% |
| Remaining 10 domains | Combined balance of the exam |
Beyond the Exam: Licensing Requirements
Passing the TN-EC exam is necessary but not sufficient for holding the Electrical (CE) contractor license. The Board also requires:
- Tennessee Business and Law exam - a separate pass requirement alongside the trade exam
- Documented relevant experience and a reference attesting to your qualifications
- Financial capacity, shown either through a required financial statement or a Board-approved surety-bond route
- Liability insurance
- Workers' compensation coverage or a documented exemption
These pieces run in parallel with, not instead of, the trade exam. A common mistake is treating the TN-EC exam as the finish line when it's actually one input into a larger application file the Board reviews. For a complete rundown of every prerequisite and how to sequence them, see TN-EC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Actually Needs a TN-EC
The CE classification is the statewide contractor designation generally used for covered electrical projects at or above $25,000. In practice, that means the TN-EC exam is aimed at:
- Electrical contracting business owners bidding commercial and larger residential electrical projects
- Electricians stepping up from employee status into running or co-owning a licensed contracting entity
- Project managers and estimators at electrical firms who need the license to sign contracts and pull permits
This is distinct from the Limited Licensed Electrician pathway, which serves a narrower scope of work. If your goal is running an electrical contracting business capable of taking on larger jobs - rather than working under someone else's license - the CE classification via the TN-EC exam is the route. For context on where this credential fits into career and hiring conversations, TN-EC Jobs and TN-EC Salary Guide 2026: Complete Earnings Analysis go into more detail on the employment side.
Building a Study Plan Around Domain Weight
Generic study advice - spaced repetition, timed practice blocks - only helps if it's applied to the actual TN-EC blueprint. Given that Wiring and Protection (23%) and Wiring Methods and Materials (15%) together make up close to 40% of the exam, a sensible plan front-loads those two domains before spreading remaining weeks across the other ten.
Wiring and Protection
- Drill overcurrent protection and conductor sizing from the 2017 NEC
- Practice fast lookups in Ugly's Electrical References
Wiring Methods and Materials
- Study raceway and enclosure rules across occupancy types
- Cross-check against the American Electricians' Handbook
Remaining Domains
- Cycle through Plan Reading, Code Reading, Motors and Controls, and the rest
- Timed 100-question practice runs within the 5-hour limit
Because the exam is open-book, part of your prep should be physically tabbing your reference copies the way you'll use them on test day - whether at a Prov test center or through remote Examroom proctoring. For a structured week-by-week plan built specifically around this blueprint, see TN-EC Study Guide 2026: How to Pass on Your First Attempt. If you're still calibrating how much time this realistically takes, How Hard Is the TN-EC Exam? Complete Difficulty Guide 2026 and TN-EC Pass Rate 2026: What the Data Shows are useful companion reads. Running full-length timed drills on our practice test platform before exam day is one of the more direct ways to test whether your reference-navigation speed matches the 5-hour limit.
Costs and Renewal at a Glance
Budgeting for the TN-EC pathway involves more than the exam fee alone:
| Item | Cost |
|---|---|
| Prov exam fee (per attempt) | $53 |
| Initial contractor application fee | $250 |
| License renewal (every 2 years) | $200 |
These figures don't include Business and Law exam costs, insurance premiums, or bonding/financial statement expenses, which vary by applicant. A full cost breakdown, including how these pieces stack up over a license's life, is available at TN-EC Certification Cost 2026: Complete Pricing Breakdown.
Key Takeaway
The $53 exam fee is just one line item - the $250 initial application and $200 biennial renewal are separate Board-side costs, not Prov fees.
If you're still weighing whether pursuing the CE classification makes sense for your career or business plans, Is the TN-EC Certification Worth It? Complete ROI Analysis 2026 walks through that decision in more depth, and TN-EC Training covers preparation resources beyond self-study. You can also explore practice questions modeled on the actual blueprint to get a feel for the open-book, timed format before you schedule with Prov.
FAQ
Yes. Candidates may use the listed references - the 2017 National Electrical Code, Ugly's Electrical References (2020), OSHA 29 CFR Part 1926, and the American Electricians' Handbook, 17th Edition - during the exam.
The exam has 100 multiple-choice questions with a 5-hour time limit, and you need a 73% score to pass.
Prov has administered new TN-EC exam appointments since July 1, 2026, under the authority of the Tennessee Board for Licensing Contractors. The current bulletin is dated July 13, 2026.
Yes. Prov offers both test-center delivery and remote Examroom proctoring for the TN-EC exam.
No. You also need to pass the Tennessee Business and Law exam, document relevant experience with a reference, show financial capacity, and carry liability insurance and workers' compensation coverage (or an exemption) before the Board issues the CE license.