Electrical Contractor License Exam Guide (2026)

The U.S. electrical contractor exam is a code-book test built on the National Electrical Code (NEC, NFPA 70). It tests conductor ampacity, overcurrent protection, grounding and bonding, motor and feeder calculations, services, special occupancies, and life-safety standards in NFPA 70E and OSHA 1926 Subpart K. Some states administer their own electrical exam; others accept the ICC or PSI master/journeyman electrician series.

~100 questionstypical exam length
4 hourstime limit (varies by state)
70% to passtypical scaled score

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Where electrical contractors are licensed in the United States

About 40 states license electrical contractors statewide. The remaining states (Indiana, Kansas, Missouri, Pennsylvania, and a few others) leave licensing to cities and counties, which means you may sit a Chicago, Indianapolis, or Philadelphia exam instead of a state board exam. Either way the underlying material is the NEC plus local amendments, so this hub is your starting point regardless of issuing authority. Pick your state below for the exact issuing board, application checklist, and reciprocity rules.

Approved code books and references

Every electrical contractor exam is open-book with state-approved references. The primary reference is the National Electrical Code (NEC, NFPA 70); supplementary references vary by state.

NEC (NFPA 70) - core reference - typically 2020, 2023, or 2026 edition depending on state adoption
NFPA 70E - arc-flash PPE category tables and approach-boundary lookup
OSHA 1926 Subpart K - electrical safety on construction sites
Local amendments - NYC, Chicago, and California publish significant NEC amendments worth pre-tabbing

Confirm the exact editions in your state's current candidate information bulletin - states usually lag the newest code cycle by one or two editions. Our code-book tabbing guide walks through how to set up tabs so you can hit a section in under 30 seconds under exam pressure.

What the Electrical contractor exam tests

NEC Chapter 2 - wiring and protection. Conductor sizing tables (Article 310), overcurrent protection (240), grounding electrode systems (250), and service equipment (230). About a third of every electrical exam comes from these four articles.
NEC Chapter 3 - wiring methods and materials. Box fill calculations, raceway fill (Annex C), cable types and ampacity adjustment, and support / securing rules. Practice fast lookups in Tables 4 and 5 to save 10-15 minutes on a typical exam.
NEC Chapter 4 - equipment for general use. Article 430 motor branch-circuit and feeder sizing is a high-value target - expect at least 6-8 calculation questions on motors alone.
Load calculations. Dwelling load calc procedures (Article 220 standard and optional methods), feeder/service sizing, demand factors, and multi-family calculations.
Grounding and bonding. Article 250 is its own subspecialty - separately-derived systems, intersystem bonding, equipment grounding conductor sizing (Table 250.122), and ground-fault protection.
Special occupancies (NEC Chapter 5). Hazardous (classified) locations (500-516), health-care facilities (517), and pools/fountains (680).
NFPA 70E and OSHA 1926. Arc-flash PPE categories, approach boundaries, lockout/tagout procedures, and ladder/scaffold-adjacent electrical work.
State amendments and stamping. Many states require master electrician stamping on commercial drawings - know who can sign and what voltage / load thresholds trigger plan review.

Electrical contractor exam study plan

Tab the NEC by chapter and by high-traffic article (210, 220, 230, 240, 250, 310, 430). Do not over-tab - 60 to 80 tabs is the sweet spot.
Take one baseline timed practice exam to see where you score below 70%. Almost everyone misses motor-circuit and grounding the first time.
Drill the two weakest chapters with 25-question topic sets, looking up every wrong answer in the NEC and writing the article number on a flash card.
Take a second full-length timed exam two weeks before test day. If you score under 75%, repeat the drill phase before scheduling.
In the final week, only review your wrong-answer flash cards and re-rehearse code-lookup speed. Do not learn new material in the last 48 hours.

See our 30-day crunch plan for a compressed version, or our full exam prep guide for the extended one.

Pick your state for electrical contractor licensing details

Each state has its own electrical contractor license tiers, fees, experience requirements, and reciprocity agreements. Pick your state below for the exact licensing board, application checklist, accepted code editions, and state-specific topics that go beyond the national code references covered on this page.

New England

Cold winters, nor'easters, and historic preservation challenges define construction in these states.

Mid-Atlantic

Dense urban development, historic buildings, and freeze-thaw cycles present unique challenges.

Southeast

Hurricane exposure, humidity, and termite risks dominate construction concerns. Several states accept NASCLA.

Gulf Coast

Hurricane-resistant construction, flood zones, and strict wind codes are essential knowledge.

Midwest & Great Lakes

Extreme temperature swings, heavy snow loads, and tornado risks influence building practices.

Great Plains

Severe weather, tornadoes, and wide temperature ranges define construction in these states.

Mountain West

High altitude, heavy snow, wildfires, and seismic activity create unique building challenges.

Southwest

Extreme heat, flash floods, expansive soils, and desert construction techniques are emphasized.

West Coast

Seismic design, wildfires, and some of the nation's strictest building codes apply.

Alaska & Hawaii

Extreme climates - arctic cold or tropical conditions - require specialized construction knowledge.

All 51 state licensing guides →

Electrical practice questions and timed exams

Our timed practice exams use the same style, difficulty curve, and code references you will see on test day. Each attempt gives you an instant score, detailed rationales with code-section citations, and a weak-topic map so you know exactly where to focus next.

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Electrical contractor exam FAQ

Which NEC edition is on my electrical contractor exam?

It depends on your state. As of 2026 most states are on the 2020 NEC, several are on the 2023 NEC, and a handful (notably the California Title 24 cycle) still test the 2017 NEC. Always confirm the edition in the current candidate information bulletin before buying a code book.

How many questions are on the electrical contractor exam?

Most state electrical contractor exams run 80 to 110 multiple-choice questions over 3.5 to 4.5 hours, with a 70 to 75 percent passing score. PSI- and Prov-administered exams vary by state classification (residential vs. unlimited).

Is the electrical contractor exam open-book?

Yes, almost every U.S. electrical contractor exam is open-book with approved code references - typically the NEC, NFPA 70E, and OSHA 1926 Subpart K. Books must be tabbed and highlighted only; sticky notes, loose inserts, and digital copies are usually prohibited.

What is the difference between a master electrician and an electrical contractor license?

A master electrician is an individual credential to perform electrical work and supervise journeymen. An electrical contractor license authorizes a business to bid and pull permits. Most states require a qualifying master electrician on staff in order to issue the contractor license.

How long should I study for the electrical contractor exam?

A working journeyman with 6+ years of field experience usually needs 60 to 100 hours over 6 to 10 weeks. Career-changers and those returning to the books after 10+ years should plan closer to 150 hours over 12 weeks.