- TN-EC is the Tennessee Electrical (CE) Contractor Examination administered by Prov for the Board for Licensing Contractors.
- The exam is open-book, computer-based, 100 questions, 5-hour limit, 73% passing score.
- Wiring and Protection is the heaviest domain at 23%, followed by Wiring Methods and Materials at 15%.
- The Prov fee is $53 per attempt; initial contractor application is $250 with $200 biennial renewal.
What Is TN-EC?
TN-EC stands for the Tennessee Electrical (CE) Contractor Examination, the trade competency exam that electrical contractors in Tennessee must pass before the state will issue a CE contractor license. It is not a certificate you can add to a resume the way you'd add a vendor certification - it is a regulatory exam tied directly to the ability to legally bid and perform covered electrical work in the state.
If you've landed here searching for background on the acronym, this guide is the anchor piece for the whole site. For a deeper walk-through of registration, see TN-EC Certification, and if you want the short-form definitions, check TN-EC Meaning, What Does TN-EC Stand For?, or What Does TN-EC Mean?.
Who Governs the TN-EC Exam
The Tennessee Board for Licensing Contractors oversees the CE classification. Since July 1, 2026, Prov has handled scheduling and administration of new exam appointments, and the current bulletin governing exam content and policy is dated July 13, 2026. That bulletin is the authoritative source for topics, references, and fees - always confirm details against it before you register.
Prov gives candidates a choice of delivery: a physical test center or remote proctoring through Examroom. Both formats use the same 100-question, open-book, multiple-choice structure, and both carry the same 5-hour time limit and 73% passing threshold.
Key Takeaway
Because Prov only began administering new appointments in July 2026, make sure any study material or scheduling guidance you use reflects the current bulletin rather than an older process.
Exam Format and Registration
The TN-EC exam is open-book - you're allowed to bring or reference approved materials during the test - but that does not make it easy. With 100 questions and a 5-hour window, the real constraint is knowing where to find the right code section or reference table quickly, not memorizing everything cold. Many candidates underestimate how much time flipping through references can eat up. For a full breakdown of how the scoring and difficulty actually play out, see How Hard Is the TN-EC Exam? Complete Difficulty Guide 2026 and TN-EC Passing Score 2026: Exactly What You Need to Pass.
Registration runs through Prov, and each attempt costs $53. That fee is separate from the Board's licensing fees discussed below. If you fail, you'll need to re-register and pay the fee again for another attempt, so a wasted attempt has a real dollar cost, not just a scheduling delay.
| Exam Detail | Specification |
|---|---|
| Administered by | Prov (since July 1, 2026) |
| Governing body | Tennessee Board for Licensing Contractors |
| Format | Open-book, computer-based, multiple-choice |
| Questions | 100 |
| Time limit | 5 hours |
| Passing score | 73% |
| Exam fee | $53 per attempt |
| Delivery options | Test center or remote Examroom |
| Score validity | Typically two years |
Because score validity is time-limited, it's worth planning your license application timeline around when you sit the exam, not waiting indefinitely afterward. For fee context across the whole licensing path, see TN-EC Certification Cost 2026: Complete Pricing Breakdown, and for the current testing calendar, see TN-EC Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The 12 TN-EC Exam Domains
Unlike generic trade exams that lump content into two or three broad buckets, TN-EC breaks its material into twelve named domains. Two of them carry noticeably more weight than the rest, and understanding that weighting should directly shape how you allocate study time.
Domain 4: Wiring and Protection (23% - the largest domain)
This is the single most heavily tested domain on the exam, covering nearly a quarter of all questions. Candidates should expect deep coverage of overcurrent protection, conductor sizing and protection, grounding and bonding, and circuit design principles pulled from the 2017 National Electrical Code.
- Overcurrent protection device selection and sizing
- Grounding and bonding requirements
- Conductor ampacity and protection coordination
Domain 5: Wiring Methods and Materials (15% - second largest)
This domain focuses on the practical side of installation: which wiring methods are permitted in which applications, raceway and cable requirements, and material selection.
- Permitted wiring methods by occupancy and environment
- Raceway fill and installation requirements
- Cable types and their approved uses
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 - each make up a smaller share individually, but collectively they represent well over half the exam. Treating them as "minor" is a common mistake. A full domain-by-domain breakdown, including how the smaller categories interrelate, is covered in TN-EC Exam Domains 2026: Complete Guide to All 12 Content Areas.
Plan Reading and Code Reading as Skill-Based Domains
Two domains - Plan Reading and Code Reading - test something different from raw fact recall: your ability to navigate documents under time pressure. Plan Reading questions typically ask you to interpret electrical drawings, symbols, and schedules, while Code Reading questions test your ability to locate and correctly apply specific NEC sections. Since the exam is open-book, these two domains reward candidates who have practiced navigating their reference materials quickly, not just candidates who "know" the content.
Domain 12: OSHA Safety
OSHA Safety draws directly from OSHA 29 CFR Part 1926, the federal construction safety standard. Expect questions on fall protection, electrical safety-related work practices, and hazard communication as they apply to electrical construction sites.
Approved References
Because TN-EC is open-book, knowing exactly which references are permitted - and being fluent in their layout - matters as much as understanding the underlying concepts. The bulletin lists four references:
- 2017 National Electrical Code - the backbone reference for wiring, protection, and installation questions
- Ugly's Electrical References (2020) - a compact quick-reference for formulas, tables, and common calculations
- OSHA 29 CFR Part 1926 - the source for the OSHA Safety domain
- American Electricians' Handbook, 17th Edition - broader technical and applied electrical content
Key Takeaway
Bring tabbed, organized copies of all four approved references to your exam session - under a 5-hour clock, the time you save flipping to the right page directly protects your score.
Licensing Requirements Beyond the Exam
Passing the TN-EC exam is necessary but not sufficient for licensure. The Board for Licensing Contractors also requires:
- A passing score on the separate Tennessee Business and Law exam
- Documented relevant experience in electrical work
- A qualifying reference
- Demonstrated financial capacity, either through a required financial statement or a Board-approved surety-bond route
- Liability insurance
- Workers' compensation coverage, or a documented exemption
Once approved, the initial contractor application fee is $250, and licenses must be renewed every two years for $200. For a complete rundown of every prerequisite and how to document them, see TN-EC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Who Actually Needs a CE License
The CE classification is Tennessee's statewide contractor license used generally for covered electrical projects valued at $25,000 or more. It is distinct from the Limited Licensed Electrician pathway, which applies to smaller-scope work. If you're bidding and contracting larger commercial or residential electrical jobs across the state - not just performing electrical labor under someone else's license - CE is the classification you need.
Contractors, project estimators, and electricians looking to move into ownership or independent contracting roles are the typical audience for this exam. If you're evaluating whether pursuing licensure fits your career plans, Is the TN-EC Certification Worth It? Complete ROI Analysis 2026 and TN-EC Salary Guide 2026: Complete Earnings Analysis dig into the tradeoffs, and TN-EC Jobs looks at where licensed contractors find work.
Building a Study Approach Around the Weighting
Because Wiring and Protection (23%) and Wiring Methods and Materials (15%) together make up 38% of the exam, an efficient study sequence front-loads those two domains before spreading remaining weeks across the other ten. A simple way to structure this without overcomplicating it:
Wiring and Protection
- Work through 2017 NEC sections on overcurrent protection and grounding/bonding
- Practice conductor sizing and ampacity problems
Wiring Methods and Materials
- Review permitted wiring methods by occupancy
- Drill raceway fill and cable-type questions
Remaining Ten Domains
- Rotate through Plan Reading, Code Reading, Equipment for General Use, Motors and Controls, Communication Systems, Special Occupancy, Special Equipment, and Hazardous Locations
- Practice OSHA Safety scenarios from 29 CFR Part 1926
Timed Practice and Reference Navigation
- Take full-length timed practice runs under the 5-hour limit
- Tab and organize all four approved references
This isn't a generic study calendar - it's built specifically around TN-EC's documented domain weighting so your heaviest study hours match the heaviest-tested content. For a more detailed lesson-by-lesson plan, see TN-EC Study Guide 2026: How to Pass on Your First Attempt. Practicing with realistic questions on our practice test platform before exam day helps confirm you can apply reference materials quickly under time pressure, not just recognize concepts in isolation.
Key Takeaway
Spend roughly two-fifths of your total prep time on Wiring and Protection and Wiring Methods and Materials combined - that's where the 38% of exam weight lives.
If you want data-driven context on how candidates typically perform across these domains, TN-EC Pass Rate 2026: What the Data Shows is a useful companion read, and TN-EC Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the highest-value facts into a single reference page. You can also run through timed sample questions on the main practice site to get comfortable with the open-book format before your actual Prov appointment.
Frequently Asked Questions
TN-EC stands for the Tennessee Electrical (CE) Contractor Examination, the exam required for the CE contractor license issued by the Tennessee Board for Licensing Contractors.
Yes. Candidates may use the four approved references - the 2017 NEC, Ugly's Electrical References (2020), OSHA 29 CFR Part 1926, and the American Electricians' Handbook, 17th Edition - during the 5-hour, 100-question exam.
The Prov exam fee is $53 per attempt. Separately, the initial contractor application fee is $250, and licenses renew every two years for $200.
Start with Wiring and Protection, the largest domain at 23% of the exam, followed by Wiring Methods and Materials at 15%, since together they represent more than a third of the total exam.
Exam scores are typically valid for two years, so it's important to complete the remaining licensing requirements, including Tennessee Business and Law, within that window.