- 2B is the Electrical General examination: 50 four-option multiple-choice questions, two hours, open book, official cut-score of 70.
- The fee is USD 130 per attempt, retakes included, with a 30-day wait after a failed attempt.
- Special Installations or Constructions carries the most questions of the 12 subject areas: eight.
- Passing 2B alone does not confer a local license or certification.
The Short Answer: What 2B Means Here
On this site, 2B means Electrical General. It is an electrical code examination in the NCPCCI (National Certification Program for Construction Code Inspectors) family, and it tests how well a candidate can look things up and apply the National Electrical Code across general electrical installations. The "2B" is the exam's catalog designation, not a grade, a pencil hardness, a unit of measure, or a shorthand used in any other trade.
If you landed here after searching a short phrase, you may have found a dozen unrelated meanings. This article deals only with the Electrical General (2B) examination and the people who sit for it: inspectors, plan reviewers, contractors, and electricians who need a documented demonstration of general electrical code competence. For the broader picture, see our overview pages on what 2B is and what 2B certification is, and for the shortest phrasing of the question, what 2B stands for.
Why the "2B" Label Confuses People
The label confuses people for two reasons. First, "2B" is a short, generic-looking code that appears in many unrelated contexts, so a search for it returns a jumble. Second, the examination has a layered history. It was historically associated with the International Association of Electrical Inspectors (IAEI), which now does business as the Independent Alliance of the Electrical Industry. An earlier NCPCCI candidate bulletin (printed version 2022.01.06a) named IAEI as a partner and included this exact 2B exam. The current bulletin retains 2B but no longer lists IAEI among its partners.
This matters because candidates sometimes assume that passing 2B places them on an IAEI roster or starts a renewal clock. Based on the current bulletin, that assumption is unsupported. Our companion pieces on 2B meaning and what 2B means approach the same question from other angles.
Who Runs the Exam Today
The current examination administrator is Prov. Candidates test at Prov testing centers or through ExamRoom.AI remote proctoring. The authoritative source for scope and rules is the Prov NCPCCI National Certification Program for Construction Code Inspectors Candidate Information Bulletin (printed version 2024.03.12). The exam outline appears on page 5; administration rules appear on printed pages 1-3, 9-11 and 16; and the reference-rules appendix is at PDF page 22.
Read that bulletin before you buy anything. It is the document that tells you which references you may bring, how tabbing and highlighting work, and which calculator functions you will have on screen. Marketplace listings and third-party course pages sometimes describe the exam loosely; the bulletin is what governs your test day.
How the Exam Is Built
| Feature | Electrical General (2B) |
|---|---|
| Delivery | Computer-based; test center or ExamRoom.AI remote proctoring |
| Question type | Four-option multiple choice |
| Number of questions | 50 |
| Time allowed | Two hours |
| Reference policy | Open book; approved references may be highlighted and permanently tabbed before testing |
| Official cut-score | 70 |
| Fee | USD 130 per attempt, including retakes |
| Retake rule | 30-day wait after a failed attempt |
| Prequalifications | None imposed by NCPCCI to sit the exam |
What "open book" really means
Open book does not mean easy. Fifty questions in two hours gives you roughly two and a half minutes per item on average, and many items require locating the right article or table, then performing a calculation or applying an exception. Candidates who arrive with untabbed, unfamiliar books burn their time paging around. The on-screen calculator offers basic arithmetic and square root only, so you should practice load and conductor-sizing problems with that limited toolset in mind rather than a scientific calculator.
Applicable approved references may be highlighted and permanently tabbed before testing, and the NEC Handbook is permitted where applicable. Always confirm the current rules in the bulletin's reference appendix. For difficulty context, see how hard the 2B exam is.
The 12 Subject Areas, One by One
The bulletin lists 12 official subject areas and publishes item counts, not percentage weights. The allocations, in Domain 1-12 order, are 4, 3, 3, 4, 1, 4, 5, 5, 8, 5, 3 and 5, totaling 50 questions. These are exam subject areas, not a preparation curriculum, so how you order your studying is a separate decision. Our full walkthrough is in the 2B exam domains guide.
Domain 1: Cabinets, Panelboards, Switchboards, Boxes, and Conduit Bodies (4 questions)
Enclosure-focused code reading.
- Box fill and conduit body sizing logic
- Panelboard and switchboard installation requirements
- Working space and enclosure conditions that appear as application questions
Domain 2: Calculations of Load (3 questions)
Applying demand factors and load methods.
- Standard and optional calculation approaches
- Selecting the correct table before doing arithmetic
Domain 3: Calculations of Wire Size (3 questions)
Conductor selection from ampacity tables and correction factors.
- Temperature and adjustment considerations
- Matching conductor size to the calculated load and termination limits
Domain 4: Conductors and Overcurrent Protection on the Load Side of the Service (4 questions)
Where conductor sizing meets protection rules.
- Overcurrent device ratings relative to conductor ampacity
- Tap and feeder situations
Domain 5: Generators other than Dwellings (1 question)
The smallest allocation. Know the basics, but do not let it consume disproportionate study time.
Domain 6: Lighting and Utilization Equipment (4 questions)
Installation requirements for fixtures and equipment that use electricity.
Domain 7: Motors other than Dwellings (5 questions)
A calculation-heavy area.
- Motor branch-circuit and feeder sizing
- Overload and short-circuit protection relationships
- Disconnecting means and controller rules
Domain 8: Service Equipment and Conductors on the Supply Side of the Service (5 questions)
Service-entrance requirements, grounding and bonding at the service, and supply-side conductor rules.
Domain 9: Special Installations or Constructions (8 questions)
The largest allocation on the exam, at eight questions. This is a broad bucket of NEC chapters covering unusual installations, so the main skill is navigating quickly to the correct article.
Domain 10: Special Occupancies (5 questions)
Occupancy-driven requirements, where the type of space changes the rules that apply.
Domain 11: Switches, Disconnects and Controllers (3 questions)
Device-level requirements, ratings, and installation conditions.
Domain 12: Wiring Methods (5 questions)
Selection and installation of raceways, cables, and supports, including where each method is permitted or restricted.
The NEC Edition Question
This is the single most common point of confusion for new candidates. The bulletin lists NEC 2017 and NEC 2020 forms with identical subject allocations. The newer listed form is 2B Electrical General (2020 Code), using NFPA 70, National Electrical Code, 2020 edition.
Two practical consequences follow:
- The booked edition governs the answers. You may bring other editions of the same reference title, but the specified edition determines the correct answer. If you book the 2020 form, answer from the 2020 NEC, even if your daily work uses a newer code.
- A 2023 study guide is not a 2023 exam. You will see study guides labeled for the NEC 2023 edition. They are preparation material. They are not evidence that NCPCCI has released a newer 2B exam form. If you use a 2023-based guide, cross-check every answer against the 2020 text before relying on it.
Key Takeaway
Before you purchase any reference or study guide, confirm which exam form you are booking, then match your tabbed NEC to that edition. Editions differ in numbering and wording, and a mismatch costs minutes you do not have.
For a structured prep plan built on this, see the 2B study guide and the one-page 2B cheat sheet.
What Passing Does and Does Not Get You
Passing 2B demonstrates that you met the official cut-score of 70 on the Electrical General examination. By itself, it does not confer a local license or certification. Jurisdictions set their own licensing and hiring rules, and those rules vary. Some employers and agencies treat a 2B result as evidence of code competence; others require additional credentials or experience.
Who tends to care
- Building departments and third-party inspection agencies that hire electrical inspectors or plan reviewers
- Contractors and electricians who want an independent measure of code knowledge
- Candidates pursuing an ICC E2 transition (see the next section)
Because NCPCCI imposes no prequalifications to sit the exam, anyone can register. Eligibility for jobs or local credentials is a separate question; our 2B requirements guide separates exam access from employer expectations. For hiring context, see 2B jobs and the 2B salary guide, which distinguishes occupation-wide wages from any premium tied to the credential. If you are weighing the investment, is the 2B certification worth it and the 2B certification cost breakdown lay out the tradeoffs.
2B Versus ICC E2 and CEI-M
These are three different things, and mixing them up leads to wasted money.
| Item | What it is | Relationship to 2B |
|---|---|---|
| NCPCCI Electrical General (2B) | The examination covered in this article | The exam itself |
| ICC E2 | An ICC credential | ICC's NCPCCI Reciprocity page (updated November 6, 2025) permits an E2 transition application using NCPCCI 2B, a supporting score report, and a current license, with a separate fee and approval |
| CEI-M | An IAEI-related program with its own examination and practicum | A distinct program, not an alias for 2B |
The key point: passing 2B does not automatically grant E2. The transition is an application with its own fee and an approval step. Verify current terms on the ICC reciprocity page before you plan around it.
Scheduling Your Study Around the 2B Map
Because the bulletin publishes item counts rather than a study sequence, you choose the order. One sensible approach is to start with the skills that unlock other domains, then spend the most time where questions are densest. Here is a six-week sketch tied to the actual allocations.
Reference setup and the calculation core
- Tab your NEC (matching the booked edition) and practice finding articles fast
- Domains 2 and 3: load and wire-size calculations using only basic arithmetic and square root
Protection and motors
- Domain 4: conductors and overcurrent protection on the load side
- Domain 7: motors other than dwellings, building on Week 1 calculations
Service and enclosures
- Domain 8: service equipment and supply-side conductors
- Domain 1: cabinets, panelboards, switchboards, boxes, and conduit bodies
Special installations (the largest bucket)
- Domain 9: eight questions, so give it the most hours
- Domain 10: special occupancies, which often pairs with Domain 9 articles
Methods, devices, and the smaller areas
- Domain 12: wiring methods
- Domains 6 and 11: lighting and utilization equipment; switches, disconnects and controllers
- Domain 5: generators other than dwellings (one question, a brief pass)
Timed full-length practice
- Simulate 50 questions in two hours with your tabbed book
- Review misses by domain and re-tab weak spots
For timed practice that mirrors the format, use the 2B practice test, and review your results against the domain list above. If you are working out when to book, see 2B exam dates.
Frequently Asked Questions
It means the NCPCCI Electrical General (2B) examination: a computer-based, open-book, 50-question, two-hour test on general electrical code application, administered by Prov. It is covered in more depth on our 2B certification page.
The official cut-score is 70. That is a scoring threshold, not an empirical pass rate. No authoritative current pass rate has been verified for this exam; see 2B passing score and 2B pass rate for how to interpret the available information.
The fee is USD 130 per attempt, including retakes. After a failed attempt you must wait 30 days before retesting.
No. Passing alone does not confer a local license or certification. Licensing is determined by your jurisdiction and employer requirements.
Use the edition for the exam form you book. The 2020 form is the newer listed form. You may bring other editions of the same reference title, but the specified edition governs the correct answers, and an NEC 2023 study guide does not mean there is a 2023 exam form.
Bottom line: 2B is a specific, well-defined exam with a published structure, a modest per-attempt fee, and a format that rewards preparation with the right references. Know the 12 subject areas, match your book to the booked edition, and practice under timed conditions with the tools you will actually have on test day.