NC Limited Electrical Contractor Exam: Complete Study Guide (2026)
You've put in the hours on the job — crawling through attics, pulling wire, terminating panels. Now it's time to put that experience to work on paper. The North Carolina limited electrical contractor exam is the last hurdle between you and a license that lets you run your own jobs. Pass it, and you can take on single projects up to $60,000 with equipment rated up to 1,000 volts across the state. That's real work, real contracts, and real income on your terms.
This guide covers everything you need to know: what's on the exam, how to prepare, what to bring on test day, and how our free practice exam can sharpen your skills before you sit down at the PSI center. Let's get into it.
NC Limited Electrical Contractor Exam Overview
The NC electrical contractor license exam is administered by PSI on behalf of the North Carolina State Board of Examiners of Electrical Contractors (NCBEEC). Here's what to expect:
- Questions: 100 scored multiple-choice questions
- Time limit: 360 minutes (6 hours)
- Passing score: 70% — meaning you need 70 correct answers out of 100
- Format: Open book — the 2020 NEC, the 2013 NFPA 72, and the current NASCLA Contractors Guide to Business, Law and Project Management
- Score reporting: Immediate — you'll know your result before you leave the testing center
Six hours sounds like plenty of time. It isn't — not if you're hunting through the NEC for every answer. The candidates who pass are the ones who know how to find things fast, not just the ones who know the material cold. More on that in the study tips section.
Check the official exam bulletin for current testing center locations and scheduling details.
Exam Topics and How They're Weighted
Knowing what's on the exam is half the battle. Here's how the 100 scored questions break down by topic — ranked from heaviest to lightest so you know where to put your energy first.
Laws, Rules, Basic Business Practices, and Practical Applications — 18 items (highest weight)
This is the biggest single chunk on the exam. It covers NC Electrical Contractors Licensing Law (GS Chapter 87, Article 4), the Board's rules (21 NCAC 18B), the NASCLA Contractors' Guide for NC Electrical Contractors, business and project management, lighting and power plans, and the National Fire Alarm Code. Critical note: These questions are open book. You may use the NASCLA Guide during the exam — and in the North Carolina Electrical Edition, the Licensing Law and the Board's rules are reprinted as appendices, so know that material well and know exactly where to find it.
Service Entrance and Equipment — 11 items
Installation requirements, service equipment specs, and sizing calculations. Expect to work with Article 230 frequently.
Load Calculations — 11 items
Branch circuit loads, total computed load, conductor ampacity, and low-voltage systems. This is a math-heavy section — know Article 220 well.
Bonding and Grounding — 10 items
Systems requiring grounding, electrode conductors, bonding jumpers, conductor color coding, and ground-fault protection.
Wiring Methods and Terminations — 10 items
Permitted applications, conduit and wireway fill calculations, and conductor characteristics.
Overcurrent Protection — 9 items
Circuit breaker and fuse sizing, location requirements, and enclosure rules.
Boxes and Fittings — 8 items
Box fill calculations and general installation requirements.
Motors and Control Wiring — 7 items
Branch circuit ampacity, overload protection, short-circuit and ground-fault protection, and disconnects.
Appliances, Equipment, and Lighting — 7 items
Air conditioners, space heating, transformers, and lighting fixtures across residential, commercial, and industrial settings.
Special Occupancies and Hazardous Locations — 6 items
Mobile homes, swimming pools, and underwater lighting fixtures.
General — 3 items
Definitions and general installation requirements.
Sample Exam Questions
Here are five sample questions pulled straight from the exam's topic areas. Work through them — but don't expect the answers here. Head over to our free practice exam to check your knowledge.
Question 1 (Laws, Rules, Basic Business Practices, and Practical Applications)
The listed qualified individual employed at your firm's branch place of business resigns without notice. Within how many days must the firm's authorized officer or owner report that loss to the Board?
A) 30 days
B) 5 days
C) 20 days
D) 10 days
What this tests: Your working knowledge of Board reporting requirements under the NC Electrical Contractors Licensing Law — which you can look up in the law appendix of the NASCLA Guide if you know where it is.
Question 2 (Wiring Methods and Terminations)
A contractor is adding conductors to an existing raceway on a commercial remodel. Apart from any tabulated percentage cross-sectional fill, the number and size of conductors permitted in any raceway is limited by which requirement?
A) A maximum conductor fill of 31 percent for two conductors
B) Heat dissipation and withdrawal without conductor damage
C) A maximum of nine current-carrying conductors per raceway
D) Ampacity adjustment applied to all conductors over three
What this tests: Your understanding of the NEC's actual reasoning behind raceway fill limits — not just the percentage tables.
Question 3 (Laws, Rules, Basic Business Practices, and Practical Applications)
The annual license fee for the limited classification shall not exceed what amount for each principal and each branch place of business?
A) $150.00
B) $100.00
C) $250.00
D) $200.00
What this tests: Knowledge of the Limited license fee structure — another item you should be able to find fast in the law appendix of the NASCLA Guide.
Question 4 (Overcurrent Protection)
A disconnecting means must be provided on the supply side of fuses so that each circuit containing fuses can be independently disconnected from the source of power. This requirement applies to which fuses?
A) Cartridge fuses in circuits of any voltage
B) All fuses rated over 30 amperes
C) Plug fuses in circuits over 125 volts between conductors
D) Cartridge fuses in circuits over 300 volts only
What this tests: Knowing where the NEC draws the line on disconnecting means for different fuse types and voltage levels.
Question 5 (Service Entrance and Equipment)
You are installing the service for a small commercial storage building. The load calculated in accordance with Article 220 is 42 amperes, and the installation is not limited to one or two 2-wire branch circuits. What is the minimum rating permitted for the service disconnecting means?
A) 50 amperes
B) 100 amperes
C) 45 amperes
D) 60 amperes
What this tests: Application of Article 230 minimums — a practical sizing scenario you'll encounter on real jobs.
What Types of Questions to Expect
Here's a breakdown of the kinds of problems you'll face by topic:
- Bonding and Grounding: Identifying which systems require grounding, sizing grounding electrode conductors, applying bonding jumper rules, and understanding conductor color coding.
- Overcurrent Protection: Sizing breakers and fuses for specific circuits, identifying correct placement in a circuit, and selecting appropriate enclosures.
- Wiring Methods and Terminations: Choosing permitted wiring methods for given conditions, calculating conduit fill, and applying termination rules.
- Boxes and Fittings: Box fill calculations using conductor counts and device volumes, plus installation requirements.
- Service Entrance and Equipment: Service sizing, disconnect rating minimums, service equipment installation, and Article 230 application.
- Motors and Control Wiring: Branch circuit conductor sizing, overload and short-circuit protection selection, and disconnect/controller requirements.
- Special Occupancies and Hazardous Locations: Mobile home feeder requirements, pool bonding and wiring, and underwater lighting fixture rules.
- Load Calculations: Computing branch circuit and feeder loads, applying demand factors, and determining minimum conductor ampacity.
- Appliances, Equipment, and Lighting: Sizing circuits for A/C units, space heaters, transformers, and lighting systems across occupancy types.
- General: Applying NEC definitions and general installation requirements across a range of scenarios.
- Laws, Rules, Basic Business Practices, and Practical Applications: Licensing law details, Board rules, NASCLA business practices, and fire alarm code — the largest practice pool because this is the heaviest topic on the exam.
Total: 549 practice questions across all topics.
Required Study Materials
The NCBEEC specifies exactly which references you may bring into the testing room. Get these before you do anything else:
National Electrical Code 2020
This is your primary open-book reference on exam day. Every NEC question can be looked up — if you know where to find it. Tabs and highlights are allowed (no Post-It notes). Buy this early so you have time to learn it, not just own it.
NASCLA Contractors Guide to Business, Law and Project Management — North Carolina Electrical Contractors, 14th Edition
This covers the business, law, and project management content tested on the exam, and you may bring it into the testing center. The North Carolina Electrical Edition also reprints the Licensing Law and the Board Rules as appendices, so it's your test-day reference for that whole block — tab it and learn your way around it.
You may also bring the 2013 National Fire Alarm Code (NFPA 72) — the NEC, NFPA 72, and the NASCLA Guide are the references allowed in the testing center.
Nothing else comes in with you. Loose papers, partial references, and temporary tabs will not be permitted.
Study Tips From the Field
Tab and highlight before anything else. On an open-book exam, speed wins. The candidates who pass aren't necessarily the most knowledgeable — they're the fastest at landing on the right page. Buy the 2020 NEC, then work through it with highlighters and permanent tabs until you can hit any topic in seconds. Learn the index and table of contents the way you know your own panel schedule.
Answer first, skip second, review third. Go through all 100 questions once. Answer the ones you're confident on and flag the ones you're not. Then circle back. Don't burn 10 minutes on a single question while the clock runs — that's how good electricians fail exams. Our practice exams let you bookmark questions for later review, just like the real PSI interface.
Give yourself three to six weeks. Use the official exam bulletin as your study roadmap. Focus your NEC time on finding things fast, not memorizing article numbers. Set your practice target at 80% or above — aim above the cut score so the real exam feels comfortable, not tight.
Practice under the clock. Exam-clock anxiety is real. Timed practice sessions train your pacing so the format feels routine by test day, not stressful. Start with the free practice exam to get a feel for question style, then move to the full timed practice exam to simulate actual test conditions.
Get Started With a Free Practice Test
You've got the knowledge from years on the job. Now it's time to prove it on paper. The North Carolina electrical contractor practice test we've built mirrors the real exam — same topics, same time pressure, same format.
Start with the free practice exam — 10 questions, no account needed, no cost. It's a quick way to gauge where you stand and get a feel for how the questions are written. When you're ready to go deeper, the full practice exam matches the real PSI North Carolina electrical exam exactly: 100 questions, 360-minute timer, and a detailed score breakdown by topic so you know exactly where to focus your remaining study time.
Visit the state licensing website for official application forms and requirements. Then come back here, grab your NEC, and start practicing. You've done harder work than this — now go get licensed.