E-1 Unlimited Electrical Contractor • PSI • 100-Question Trade Exam • Separate Business and Law Exam
Ready to move from solving electrical problems to running electrical projects? The Connecticut Master Electrician Contractor Exam Prep path leads to the state's E-1 Unlimited Electrical Contractor license. "Master Electrician" is a common search term, but E-1 is the official Connecticut classification.
The Connecticut Department of Consumer Protection (DCP) determines license eligibility. PSI administers the examinations. The E-1 trade exam includes 100 questions, a four-hour limit, and a 70% passing score. Contractor applicants must also pass a separate 50-question Business and Law exam in two hours with a 70% score.
Both examinations are open book. For E-1 trade testing, the PSI bulletin currently permits the 2020 or 2023 National Electrical Code or NEC Handbook. The 2026 NEC in newer preparation packages is useful for studying, but it is not listed as an approved exam-room edition.
Master-level preparation covers electrical theory, services, feeders, conductors, boxes, grounding, bonding, photovoltaics, motors, power, fire alarms, overcurrent protection, and safety. Contractor preparation adds estimating, bids, contracts, liens, labor rules, financial management, licensing, and project management.
Find relevant books in the 2026 Connecticut Master Electrician Super Combo, the Master Electrician Calculations and NEC Combo, and the Master Electrician Study Guide and NEC Combo. Match your testing-room references to the active PSI bulletin, even when studying from a newer book at home.
Connecticut normally requires two years as an unlimited licensed journeyperson or six years of approved equivalent experience and training to qualify for E-1. DCP's equivalent-training route specifies 12,000 on-the-job hours and 720 classroom hours.
Important Connecticut E-1 update: Contractor licensing requires passing both the 100-question E-1 trade examination and the 50-question Business and Law examination. Both require 70% to pass. The currently published E-1 trade references permit the 2020 or 2023 NEC, not the 2026 NEC. The Business and Law exam uses the Contractors Guide to Business, Law and Project Management, Connecticut, 6th Edition. Always check the latest PSI Electrical Trades Candidate Bulletin before your test.
Connecticut calls its unlimited electrical contractor license the E-1 Unlimited Electrical Contractor credential. It allows the holder to perform electrical work defined by Connecticut law at the contractor level. It is different from the E-2 Unlimited Electrical Journeyperson license.
An E-1 contractor may take responsibility for electrical contracting work, subject to state licensing and business rules. That responsibility goes beyond installing conduit or diagnosing a stubborn circuit. Contractors must understand safe work, bidding, estimating, schedules, employees, contracts, and customer obligations.
The E-1 trade exam measures broad electrical knowledge. Its most heavily tested topics include services and branch circuits, conductors, and photovoltaics. Special occupancies, grounding, raceways, motors, and safety also matter.
State rules normally require two years as a properly licensed unlimited electrical journeyperson or at least six years of approved equivalent experience and training before qualifying for the E-1 examination.
DCP's equivalent-experience application breaks the route into 8,000 apprentice hours plus 4,000 licensed work hours, totaling 12,000 hours. It also lists 720 classroom hours. This is the equivalent-training standard, not a promise that every applicant follows the identical paperwork route.
Review the official Connecticut electrical license classifications and verify your specific experience with DCP before applying.
Official credential: E-1 Unlimited Electrical Contractor.
Licensing authority: Connecticut DCP and the Electrical Work Examining Board.
Testing company: PSI.
Exams: E-1 Trade and Business and Law.
Equivalent-training route: 12,000 on-the-job hours plus 720 classroom hours.
This checklist follows the journey from E-2 field experience to E-1 contractor readiness. Eligibility comes first; an excellent study routine cannot replace the state application.
| Step | Requirement | What to Verify |
|---|---|---|
| Choose E-1 | Unlimited Electrical Contractor | Do not register for E-2 Journeyperson by mistake. |
| Confirm qualification | Two years E-2 or equivalent route | Match your credentials to DCP's approved eligibility pathway. |
| Document experience | Work history and employer letters | Equivalent applicants need detailed notarized employment letters. |
| Verify schooling | 720 equivalent classroom hours | Check required classes and official transcripts. |
| Submit DCP application | State approval | DCP determines examination eligibility. |
| Study the E-1 outline | 100 trade questions | Review all sixteen official trade subjects. |
| Prepare for Business and Law | 50 questions | Study Connecticut law, bids, contracts, and management. |
| Get approved references | NEC 2020 or 2023 | Match the PSI list; newer prep editions do not automatically qualify. |
| Schedule with PSI | Two examination portions | Arrange both tests within the applicable eligibility period. |
| Complete licensing | Score reports and fee | Follow DCP's issuance instructions once requirements are met. |
The Connecticut PSI bulletin separates the contractor trade examination from the Business and Law examination. Prepare for both rather than assuming that passing the electrical section finishes the process.
| Exam Detail | Authority | Current Information |
|---|---|---|
| Official license | DCP | E-1 Unlimited Electrical Contractor |
| E-1 trade questions | PSI | 100 |
| E-1 trade time | PSI | 4 hours (240 minutes) |
| Trade passing score | PSI | 70 correct (70%) |
| Business and Law questions | PSI | 50 |
| Business and Law time | PSI | 2 hours (120 minutes) |
| Business passing score | PSI | 35 correct (70%) |
| Examination format | PSI | Both portions open book |
| Trade approved NEC | PSI | 2020 or 2023 NEC / NEC Handbook |
| Business approved book | PSI | NASCLA Connecticut Business, Law and Project Management Guide, 6th Edition |
| References | PSI | Candidate-supplied and preapproved |
| Permanent reference tabs | PSI | Allowed |
| Temporary sticky tabs | PSI | Not allowed |
| Writing in references during exam | PSI | Not allowed |
| Exam fee | PSI 2026 bulletin | $59 per examination portion; verify current amount |
| Standard qualification | DCP | 2 years as unlimited licensed journeyperson, or approved equivalent |
| Equivalent work experience | DCP | 12,000 qualifying work hours |
| Equivalent classroom training | DCP | 720 hours |
Trade: 100 questions, four hours, 70% to pass.
Business and Law: 50 questions, two hours, 70% to pass.
Exam references: Approved codebooks and the specified Connecticut business guide.
There are sixteen trade categories totaling 100 questions. The three largest subjects, services, conductors, and photovoltaics, each contribute ten questions. Together, they make up 30% of the trade exam.
Special Occupancies and Equipment adds nine questions, while Raceways and Boxes adds eight. Grounding and Bonding carries seven. These topics reward careful code lookup and repeated problem solving.
Do not ignore less familiar systems. A contractor may spend most days on service upgrades yet still face high-voltage, fire alarm, and illuminated-sign questions on the examination.
Because questions are spread across many topics, combine focused study with timed review of the entire blueprint.
| E-1 Trade Category | Questions | Study Priority |
|---|---|---|
| Services, Feeders, and Branch Circuits | 10 | Study load calculation, feeder selection, protection and disconnecting means. |
| Conductors and Cables | 10 | Know insulation types, ampacity tables, adjustments and conductor sizing. |
| Photovoltaics | 10 | Review solar conductors, equipment, disconnects and safe PV installations. |
| Special Occupancies and Equipment | 9 | Learn unusual installations, special equipment and their extra NEC rules. |
| Raceways and Boxes | 8 | Practice conduit fill, box fill, supports and wiring methods. |
| Grounding and Bonding | 7 | Review electrode systems, bonding jumpers and fault-current paths. |
| Electrical Power | 6 | Practice power, transformers, energy and calculations. |
| Motors | 6 | Review motor conductors, controls, overload devices and disconnects. |
| General Electrical Knowledge | 6 | Build confidence in electrical theory and basic code principles. |
| Overcurrent Protection | 6 | Select appropriate protective devices and understand their ratings. |
| Safety Information | 6 | Study OSHA electrical safety and construction-site responsibilities. |
| Fire Detection and Alarm Systems | 5 | Study fire alarm wiring and NFPA 72 concepts. |
| High Voltage | 4 | Review equipment, safety and distribution at higher voltages. |
| Lighting | 3 | Know lighting branch circuits and controls. |
| Low Voltage | 2 | Review low-voltage installation conditions. |
| Illuminated Signs | 2 | Study the NEC requirements for signs. |
Total: 100 questions in 16 categories.
Largest areas: Services, Conductors, and Photovoltaics at 10 questions each.
Target: At least 70 correct answers.
Start with the official PSI candidate bulletin. Print a checklist of all sixteen trade subjects and the eleven Business and Law subjects. Then use two study notebooks: one for technical calculations and one for business rules.
For technical practice, spend extra time on NEC tables, conductor sizing, electrical services, special occupancies, and solar. Highlight key definitions in your approved practice codebook. Keep 2026 code changes separate from questions based on the 2020 or 2023 NEC.
For business preparation, learn how estimates become bids, how contracts allocate work, how construction liens operate, and how taxes and labor laws affect a job. A contractor needs more than a neat panel schedule!
Use short timed sessions throughout the week. On practice day, complete 100 electrical questions in four hours and 50 business questions in two. Then review every wrong answer and record where the correct rule appears.
Electrical: Services, Conductors, Photovoltaics, Raceways, Special Occupancies.
Calculations: Loads, motors, power, transformers, ampacity.
Business: Bidding, contracts, lien law, payroll, financial management.
References: Learn with the exact PSI-approved books you plan to bring.
The Connecticut Master Electrician Calculations Combo adds electrical math review, while the Master Electrician Super Combo includes a Connecticut guide and flash cards.
The Connecticut E-1 examination covers electrical services, conductors, raceways, grounding, motors, and photovoltaic systems. Understanding how these systems connect can help make code questions easier to solve.
Educational diagram only. Actual installation must follow the applicable electrical code.
Follow these steps from trade qualification to contractor licensure.
Read DCP's scope statement for the Unlimited Electrical Contractor classification.
Show two years as an E-2 unlimited journeyperson or qualifying equivalent experience.
Equivalent-route applicants should gather 12,000 work hours and 720 approved classroom hours.
Submit the proper DCP contractor application and required supporting documents.
Set up the approved 2020 or 2023 NEC and the Connecticut 6th Edition business guide.
Cover all 16 trade subjects and all 11 Business and Law subjects.
Aim for 70/100 trade answers and 35/50 business answers within the separate time limits.
Send required score reports and pay applicable state fees under DCP instructions.
The official E-1 trade breakdown has 100 questions. Each question therefore equals one percentage point.
Total: 100 trade questions.
Highest-weight categories: Services, Conductors, and Photovoltaics, 10 questions each.
Business and Law is a separate 50-question test.
For the trade exam, PSI lists the 2020 or 2023 NEC or NEC Handbook and several technical references. The Business and Law portion has its own approved Connecticut business guide.
Approved reference books must be supplied by the candidate. PSI permits permanent tabs and pre-exam highlighting, but prohibits loose notes, temporary Post-it tabs, and writing in books during testing.
| Reference Book | Edition | Purpose |
|---|---|---|
| National Electrical Code / NEC Handbook | 2020 or 2023 | Official electrical trade code reference. |
| 29 CFR Part 1926 OSHA Construction Regulations | Latest amendments or PSI selection | Construction safety rules. |
| Ugly's Electrical References | 2020 or 2023 | Useful formulas, tables, and quick-reference material. |
| NFPA 72, National Fire Alarm Code | 2013 | Fire alarm knowledge. |
| Photovoltaic Systems, James Dunlop | 3rd Edition | Solar and PV installations. |
| Convert Your Home to Solar Energy | 2010 | Additional listed solar reference. |
| National Electrical Safety Code | 2012 | Safety, distribution, and high-voltage concepts. |
| Contractors Guide to Business, Law and Project Management, Connecticut | 6th Edition | Approved reference for the separate Business and Law exam. |
| 2026 National Electrical Code | Home study only | Not on the currently listed E-1 testing-room approved book list. |
Critical: The 2026 NEC that comes with newer study bundles is not currently listed for the E-1 exam room.
Business reference: Connecticut NASCLA Contractors Guide, 6th Edition.
Rule: Verify both reference lists again close to your exam date.
A book is only helpful when you can locate the right rule quickly. Practice finding the conductor table, article, exception, or formula without wandering through the NEC for five minutes.
Trade pace: 240 minutes for 100 questions, about 2.4 minutes per question.
Business pace: 120 minutes for 50 questions, also 2.4 minutes per question.
Both tests: Open book with approved references and PSI security rules.
The E-1 Unlimited Electrical Contractor classification is Connecticut's unlimited contractor-level electrical license. It covers electrical work defined in the state's law and carries responsibilities that go beyond the E-2 journeyperson role.
An E-1 contractor may plan and perform covered electrical contracting work, including services, distribution, branch circuits, motors, lighting, equipment, special occupancies, and related systems. Work must still meet applicable law, code, permit, safety, and licensing requirements.
Contractor authority does not remove the need for qualified workers, safe supervision, accurate pricing, and sound contracts. A project can be electrically correct and still go wrong when the estimate misses expensive materials or the schedule ignores inspections.
That is why Connecticut requires both the trade portion and Business and Law portion. The electrical exam addresses technical competence. The business portion tests the knowledge required to take on contractual and operational responsibility.
An E-2 journeyperson may perform unlimited electrical work only while working for a properly licensed contractor. The E-1 classification is the contractor-level step for qualified candidates who want broader contracting responsibility.
E-1: Unlimited Electrical Contractor.
E-2: Unlimited Electrical Journeyperson, employed by a properly licensed contractor.
Important: Specific company, insurance, permits and local operational obligations must be checked separately.
| Classification | License Type | Purpose or Exam |
|---|---|---|
| E-1 | Unlimited Electrical Contractor | Contractor-level electrical authority; trade and Business and Law exams. |
| E-2 | Unlimited Electrical Journeyperson | Unlimited electrical work while employed by a properly licensed contractor. |
| C-5 / C-6 | Limited Electrical Contractor / Journeyperson | Specific limited low-voltage and signal work. |
| C-7 / C-8 | Limited Electrical Sign Contractor / Journeyperson | Scope limited to defined electrical sign work. |
| PV-1 / PV-2 | Limited Solar Contractor / Journeyperson | Limited solar work within state-defined scope. |
| L-1 / L-2 | Electrical Lines Contractor / Journeyperson | Line and high-voltage work within defined state scope. |
| E-1 Trade | PSI trade portion | 100 questions; 240 minutes; 70% passing. |
| Business and Law | PSI contractor portion | 50 questions; 120 minutes; 70% passing. |
Master Electrician: Common search language for the E-1 contractor-level preparation topic.
Official application choice: E-1 Unlimited Electrical Contractor.
2 years licensed unlimited journeyperson or approved equivalent
12,000 OJT / 720 classroom hours on equivalent route
Licensing, contracts, and operations
Equivalent route: DCP lists 8,000 apprentice OJT hours plus 4,000 licensed OJT hours and 720 classroom hours.
State decision: DCP reviews eligibility; passing PSI is not automatic license issuance.
Study the trade portion and Business and Law separately, while checking your codebook speed throughout.
The E-1 examination can be demanding because it measures both broad technical knowledge and the speed of finding answers in approved references. There are 100 trade questions in four hours, followed by a separate 50-question Business and Law hurdle.
Working electricians know many installation rules from experience. A timed exam can still surprise them with a question about solar, illuminated signs, a special occupancy, or a calculation that rarely appears on their own jobs.
Services, conductors, and photovoltaics account for 30 trade questions. Add special occupancies, raceways, and grounding, and the bulk of the test touches code-intensive subjects. That does not mean other categories are safe to skip.
Business and Law brings a different challenge. Reading contracts, estimating materials, understanding liens, tracking finances, and managing legal duties require separate practice. Electrical excellence is important, but it will not answer a tax-law question for you.
Practice both tests at the real time limits. Learn to flag difficult problems and return to them. Using a prepared reference quickly is often more valuable than memorizing a page number.
The goal is steady accuracy, not racing. A few minutes saved on common calculations gives you more time for unfamiliar questions.
Per PSI bulletin: Arrive at least 30 minutes before testing.
Calculator: Silent, nonprinting, nonprogrammable, within PSI rules.
Trade: 70 of 100 to pass.
Business and Law: 35 of 50 to pass.
Contractor Exam Preps sells Connecticut-specific Master Electrician materials for the E-1 trade portion. The following current bundles are based on the 2026 NEC and should be treated as home-study material when PSI still lists the 2020 or 2023 NEC.
Featured Master-Level Bundle
Technical Study with Calculations
Core Code and Guide Package
Important: These technical bundles are not a substitute for the separate Connecticut Business and Law reference.
For the Business and Law portion: Use the PSI-listed Connecticut Contractors Guide, 6th Edition.
Before buying: Confirm the current product contents and the latest PSI book restrictions.
This custom E-1 credential illustration includes the Connecticut outline, electrical panel, circuit breakers, motor, solar panel, and grounding details. It is a study graphic, not a state-issued license or certificate.
Official classification: E-1 Unlimited Electrical Contractor.
Licensing board: Connecticut Department of Consumer Protection and Electrical Work Examining Board.
Testing company: PSI Services LLC.
Trade examination: 100 questions, 240 minutes, 70% passing.
Business and Law: 50 questions, 120 minutes, 70% passing.
Reference rules: Trade NEC 2020 or 2023; business guide Connecticut 6th Edition.
Technical subjects: Services, conductors, grounding, bonding, photovoltaics, motor controls, raceways, special occupancies, fire alarms, power, safety, and overcurrent protection.
Business subjects: Licensing, estimates, bidding, liens, contracts, tax laws, labor laws, project management, finances, and risk.
Equivalent-route training: DCP lists 12,000 on-the-job hours and 720 classroom hours.
Important: Study bundles based on the 2026 NEC are not the currently permitted trade exam-room code edition.
Connecticut E-1 Licensing
Connecticut uses E-1 Unlimited Electrical Contractor as the official contractor-level classification. Master Electrician is common search language, not the formal license title.
The Connecticut Department of Consumer Protection regulates the license through the Electrical Work Examining Board.
The standard pathway is two years as a properly licensed unlimited journeyperson, or at least six years of approved equivalent experience and training.
DCP lists 12,000 qualifying on-the-job hours, including 8,000 apprentice and 4,000 licensed hours, plus 720 qualifying classroom hours.
No. You must also satisfy DCP qualification, documentation, application, and fee requirements.
PSI Examination Format
The E-1 Unlimited Electrical Contractor trade examination contains 100 questions.
Four hours, or 240 minutes.
70%, which means at least 70 correct answers.
Yes. Connecticut contractor applicants are required to pass both the trade portion and Business and Law.
Fifty questions, with a two-hour time limit and a 70% passing requirement, meaning 35 correct answers.
Yes. Both examination portions permit only their PSI-approved references.
Approved References
The published 2026 PSI bulletin lists the 2020 or 2023 NEC or corresponding NEC Handbook.
The 2026 NEC is not on the currently listed approved E-1 trade references. Check for PSI updates before your test.
Contractors Guide to Business, Law and Project Management, Connecticut, 6th Edition, published by NASCLA.
Yes. Approved books may have permanent tabs and may be highlighted or annotated before the test, within PSI rules.
No. PSI disallows temporary tabs and loose or attached notes.
No. PSI prohibits writing in references during testing.
E-1 Trade Topics
Services, Feeders and Branch Circuits; Conductors and Cables; and Photovoltaics each contain ten questions.
Special Occupancies and Equipment has nine questions.
Yes. Motors includes six questions, while Grounding and Bonding includes seven.
Yes. Photovoltaics contains ten questions, making solar knowledge especially important.
Yes. Fire Detection and Alarm Systems contains five questions and High Voltage contains four.
Business and Law Topics
It covers licensing, estimating and bidding, lien law, finances, taxes, labor, projects, contracts, business organization, risk, and environmental safety.
Estimating and Bidding is largest with seven questions.
Yes. Contracts has six questions and Lien Law has two.
Yes. Labor Laws contains five questions, Tax Laws five, and Financial Management four.
Contractor Exam Preps Study Materials
The current listing includes the Connecticut Master Electrician Study Guide, Electrician Calculations Study Guide, 2026 NEC paperback with tabs, and Master Electrician flash cards.
Yes. The product listing describes a 2026 NEC paperback with tabs and the Connecticut Master Electrician Study Guide.
A 2026 NEC can help with home study but is not currently listed among PSI's E-1 exam-room approved NEC editions.
No. Check the separate PSI Business and Law approved reference requirement for the NASCLA Connecticut 6th Edition guide.
No. Preparation materials can help you practice, but passing depends on your performance and DCP still decides licensing eligibility.
Watch this 1 Exam Prep video about Master Electrician study methods, NEC navigation, electrical calculations, and preparation for contractor-level trade exams. It is a general study resource, not an official Connecticut PSI exam tutorial.
Video: 2026 Master Electrician Exam Prep License Study Guide.
Channel: 1 Exam Prep.
Connecticut reminder: For the official E-1 exam, PSI currently lists the 2020 or 2023 NEC, not 2026.
Contractor reminder: E-1 applicants also take a separate Business and Law examination.
Use these links to find Connecticut-specific E-1 study materials and verify government requirements. Contractor Exam Preps provides commercial educational resources; Connecticut DCP and PSI determine official eligibility, examination rules, and approved references.
E-1 contractor trade: 100 questions, four hours, 70% passing.
Business and Law: 50 questions, two hours, 70% passing.
NEC testing books: 2020 or 2023 under the active PSI bulletin.
Business exam reference: Connecticut NASCLA 6th Edition.
2026 NEC products: Supplemental study, not currently listed as permitted trade test references.
Ready to prepare for the Connecticut E-1 Unlimited Electrical Contractor license? Focus on the two jobs the examinations measure. First, know the electrical trade well enough to apply rules safely. Second, understand the business responsibilities that come with performing contractor-level work.
The official E-1 trade exam includes 100 questions over four hours. You must answer at least 70 correctly. The separate Business and Law exam includes 50 questions over two hours, with at least 35 correct required to pass. Both portions are open book, but that does not make the answers appear by magic. You still need to know which reference contains the rule and how to apply it.
Start with the published PSI outline. Services, feeders, and branch circuits have ten questions. Conductors and cables have ten. Photovoltaics also has ten. Those three categories make up nearly one-third of the trade exam. Special occupancies and equipment add nine, while raceways and boxes add eight. Grounding, motors, overcurrent protection, power, fire alarms, lighting, and safety round out the technical work.
Build confidence with the NEC index, definitions, conductor tables, calculations, motor rules, and grounding requirements. Time yourself. Practice finding a rule rather than guessing what it says. When you miss a question, write down the subject and where to review it later. That simple habit turns mistakes into a study plan.
Make a separate schedule for Business and Law. Review licensing, estimating, bidding, contracts, lien law, project management, tax rules, labor laws, finances, risk, and environmental safety. A contractor needs to price and manage a job as carefully as the electrician needs to wire it. A good estimate helps protect the business before the first wire is pulled.
Use the proper approved books. PSI currently permits the 2020 or 2023 NEC or NEC Handbook for E-1 trade examination questions. The newer 2026 NEC that appears in many Contractor Exam Preps bundles is for additional learning under the current bulletin, not automatically a permitted testing-room book. The Business and Law portion has its own specified Connecticut NASCLA guide, 6th Edition. Confirm both lists shortly before your scheduled dates.
Contractor Exam Preps offers a Connecticut Master Electrician Super Combo with a state-focused study guide, electrical calculations guide, 2026 NEC with tabs, and flash cards. Other Connecticut Master Electrician book combos offer simpler ways to organize home review. These materials help you study, but they do not replace the published PSI outline or DCP's licensing rules.
Finally, confirm that you qualify for E-1. Connecticut generally requires two years as an unlimited licensed journeyperson or approved equivalent experience and training. The equivalent-route guidance lists 12,000 qualifying work hours and 720 classroom hours. Keep accurate records, complete the application, pass both required tests, and follow DCP's instructions for license issuance.
Electrical skill, good reference habits, and business knowledge make a strong combination. Study each piece in a clear order, practice under realistic time limits, and keep your paperwork organized. You will enter exam day knowing what each portion asks of you, which books to use, and how to use the time available.
Find more electrical contractor exam prep materials at ContractorExamPreps.com.
