- Which 2B This Cheat Sheet Covers
- The Exam at a Glance
- The 50-Question Map by Domain
- Open-Book Rules: What You Can Bring
- NEC Edition: The One Choice That Governs Your Answers
- Domain-by-Domain Must-Know Topics
- Calculation Moves to Rehearse
- What Passing Does and Does Not Do
- Scheduling Domains by Payoff
- FAQ
- The exam is 50 four-option multiple-choice questions in two hours, open book, with an official cut-score of 70.
- Special Installations or Constructions carries the most questions: eight of the 50.
- Each attempt costs USD 130, retakes included, and a failed attempt requires a 30-day wait.
- The listed 2020 form uses NFPA 70 (NEC 2020); the specified edition governs your answers.
Which 2B This Cheat Sheet Covers
This page is about one exam only: Electrical General (2B), the NCPCCI examination historically associated with the International Association of Electrical Inspectors (IAEI), which now does business as the Independent Alliance of the Electrical Industry. Plenty of other credentials share the "2B" label, and none of their fees, dates, or content apply here. If you are still sorting out the name, start with What Is 2B? or What Does 2B Stand For? before going further.
One nuance worth knowing up front: the current Prov candidate bulletin retains the 2B exam but no longer lists IAEI among its partners. That means the exam specifications below do not by themselves establish that IAEI currently issues or renews a credential tied to this test. Treat the exam as an NCPCCI examination administered by Prov, and verify any credential claims with the organization making them.
The Exam at a Glance
Here is the one-glance version of the mechanics, drawn from the Prov NCPCCI Candidate Information Bulletin (printed version 2024.03.12).
| Item | Electrical General (2B) |
|---|---|
| Format | Computer-based, four-option multiple choice |
| Questions | 50 |
| Time allowed | Two hours |
| Official cut-score | 70 |
| Open book | Yes, with approved references (tabbing and highlighting rules apply) |
| Fee | USD 130 per attempt, including retakes |
| Retake wait after a failed attempt | 30 days |
| Prequalifications to sit | None imposed by NCPCCI |
| Administrator | Prov, at its testing centers or via ExamRoom.AI remote proctoring |
| On-screen calculator | Basic arithmetic and square root |
Two hours for 50 questions averages roughly two and a half minutes per item. That sounds comfortable until you hit a load calculation that requires you to flip between tabbed code articles and tables. Open-book exams punish slow navigation more than missing knowledge. For the cost angle in more detail, see 2B Certification Cost 2026, and for the scoring details, 2B Passing Score 2026.
The 50-Question Map by Domain
The bulletin publishes item counts, not percentage weights. The twelve subject areas below are official exam subject areas, not a preparation curriculum, and the allocations add up to exactly 50.
| # | Domain | Questions |
|---|---|---|
| 1 | Cabinets, Panelboards, Switchboards, Boxes, and Conduit Bodies | 4 |
| 2 | Calculations of Load | 3 |
| 3 | Calculations of Wire Size | 3 |
| 4 | Conductors and Overcurrent Protection on the Load Side of the Service | 4 |
| 5 | Generators other than Dwellings | 1 |
| 6 | Lighting and Utilization Equipment | 4 |
| 7 | Motors other than Dwellings | 5 |
| 8 | Service Equipment and Conductors on the Supply Side of the Service | 5 |
| 9 | Special Installations or Constructions | 8 |
| 10 | Special Occupancies | 5 |
| 11 | Switches, Disconnects and Controllers | 3 |
| 12 | Wiring Methods | 5 |
The pattern matters more than any single row. Special Installations or Constructions (eight questions) is the single biggest bucket. Motors, Service Equipment, Special Occupancies, and Wiring Methods carry five each. Generators other than Dwellings carries just one question, so a deep detour there buys almost nothing. For a full explanation of each area, read 2B Exam Domains 2026: Complete Guide to All 12 Content Areas.
Open-Book Rules: What You Can Bring
The reference rules sit in the bulletin's appendix (PDF page 22), with administration rules on printed pages 1-3, 9-11 and 16. The essentials:
- Applicable approved references may be highlighted and permanently tabbed before testing.
- The NEC Handbook is permitted where applicable.
- An on-screen calculator is provided, limited to basic arithmetic and square root.
- You may bring other editions of the same reference title, but the specified edition governs the answers.
Read the current Prov guidance again shortly before your appointment, especially if you plan remote proctoring through ExamRoom.AI, since testing-room and permitted-material rules are enforced at check-in. Do not assume the rules you remember from an older bulletin still apply.
NEC Edition: The One Choice That Governs Your Answers
The bulletin lists NEC 2017 and NEC 2020 forms with identical subject allocations, and the 2020 form, titled 2B Electrical General (2020 Code) and based on NFPA 70, National Electrical Code, 2020 edition, is the newer listed form. Candidates frequently search for NEC 2023 material, and that is understandable given that the newest study guides are published for the 2023 code. But a NEC 2023 study guide is preparation material, not evidence of a newer NCPCCI 2B exam form.
The practical consequence: confirm which edition your booked form uses, and calibrate your tabs and practice problems to that edition. A rule that changed between code cycles can flip a correct answer into a wrong one. If you bring a different edition of the same title, answers are still judged against the specified edition, so your reference and your exam can quietly disagree. Our 2B study guide covers how to choose prep materials around this.
Domain-by-Domain Must-Know Topics
Below is a working checklist by domain. Each block names the kind of knowledge the exam rewards, ordered by question allocation where it helps you prioritize.
Domain 9: Special Installations or Constructions (8 questions)
The heaviest-weighted area, and a catch-all for specialized articles that candidates often skim.
- Know where to find each special-installation article quickly; the skill is navigation as much as recall.
- Practice identifying which general rules the special article modifies or overrides.
- Expect scenario questions that describe a setup and ask which requirement applies.
Domain 7: Motors other than Dwellings (5 questions)
Motor questions mix lookup with multi-step calculation.
- Branch-circuit conductor sizing, overload protection, and short-circuit and ground-fault protection each follow separate rules; keep them distinct.
- Practice using the motor full-load current tables rather than nameplate values where the code directs.
- Rehearse disconnecting means and controller requirements as they relate to motors.
Domain 8: Service Equipment and Conductors on the Supply Side of the Service (5 questions)
This area tests the boundary between the utility, the service, and everything downstream.
- Know what counts as service conductors versus feeders.
- Review service disconnecting means, grounding and bonding at the service, and clearances.
- Be ready for questions that hinge on a single defined term.
Domain 10: Special Occupancies (5 questions)
Occupancy-specific rules for hazardous and other regulated locations.
- Practice classifying a described location before applying any wiring rules.
- Know where occupancy articles add to, or replace, the general requirements.
Domain 12: Wiring Methods (5 questions)
The most "everyday" inspector content: what method is permitted where, and how it must be installed.
- Know permitted uses, securing and support, and bending and fill limits for common raceways and cable types.
- Be ready for questions that ask what is not permitted in a given environment.
Domains 1, 4, 6, and 11 (4, 4, 4, and 3 questions)
Mid-weight areas that reward clean code navigation.
- Domain 1: enclosure and box fill, gutter space, panelboard and switchboard installation, conduit body use.
- Domain 4: load-side conductor and overcurrent protection rules, including conductor protection and tap concepts.
- Domain 6: luminaires and utilization equipment installation and support.
- Domain 11: switch ratings and locations, disconnect requirements, controller basics.
Domain 5: Generators other than Dwellings (1 question)
A single item. Learn the article's basic structure and where its key requirements live, but do not let it eat study hours you owe to Domains 7 through 10.
Calculation Moves to Rehearse
Domains 2 and 3 together hold six questions, but calculation habits also leak into motors, services, and conductors elsewhere. Practice these as repeatable routines:
- Load calculation sequence. Identify the occupancy, pull the applicable demand and calculation method, apply it in order, and only then size equipment.
- Wire-size sequence. Determine the load current, apply continuous-load multipliers where required, then check ampacity against the temperature rating of terminations and conductors.
- Correction and adjustment. Know when ambient temperature correction and conductor-count adjustment apply, and in what order you apply them.
- Square roots and basic arithmetic only. The on-screen calculator will not do more, so practice by hand any steps you would normally hand to a scientific calculator.
The exam format reduces tolerance for sloppy arithmetic, because wrong-but-plausible distractors appear among the four options. Writing each step on scratch paper, if your testing format allows it, catches slips that mental math hides. If you are weighing how demanding this all is, How Hard Is the 2B Exam? breaks down where candidates tend to struggle.
What Passing Does and Does Not Do
It helps to be clear about what a passing score represents, because marketing pages blur it.
- Registration versus licensing. NCPCCI imposes no prequalifications to sit the exam, but passing alone does not confer a local license or certification. Your jurisdiction decides what it accepts. See 2B Requirements 2026 for the eligibility picture.
- ICC E2 transition. 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. It is an application, not an automatic conversion.
- IAEI's own programs. IAEI's ICC joint and CEI programs are separate routes with their own requirements. CEI-M, for instance, is a distinct program, not another name for this exam.
If you are weighing the career side, the 2B salary guide and ROI analysis separate occupation-wide wages from any credential-specific premium, a distinction that most salary pages skip.
Key Takeaway
Before you pay USD 130, confirm what your own jurisdiction or employer actually requires. The exam score is a standardized result; whether it translates into a license, an E2 transition, or a hiring edge depends on a separate authority.
Scheduling Domains by Payoff
If you only borrow one planning idea, make it this: order your study by question allocation and by how much each domain depends on the others. A sample sequence for a six-week window:
Navigation and Domain 12
- Tab your reference and learn its layout.
- Work Wiring Methods, since its vocabulary supports nearly every other domain.
Calculations (Domains 2 and 3)
- Drill load and wire-size sequences until they are automatic.
Services and Motors (Domains 8 and 7)
- Combine lookup practice with multi-step calculations.
Special Installations and Occupancies (Domains 9 and 10)
- The biggest question bucket; spend the most scenario practice here.
Remaining domains
- Domains 1, 4, 6, 11, and a light pass on Domain 5.
Timed full-length practice
- Simulate the 50-question, two-hour format with your tabbed reference only.
You can run timed sets on our 2B practice test and track which domains cost you the most time. If a retake becomes necessary, remember the 30-day wait and fee per attempt, and use the gap to shore up the domains that dragged your score down. Scheduling logistics are covered in 2B Exam Dates 2026.
FAQ
The exam has 50 four-option multiple-choice questions and allows two hours. It is computer-based and open book with approved references.
The official cut-score is 70. This is a standard set for the exam, not a pass-rate statistic, and no authoritative current pass rate was verified for this exam.
Special Installations or Constructions, with eight of the 50 questions. Motors, Service Equipment, Special Occupancies, and Wiring Methods follow with five each. The bulletin publishes counts, not percentages.
Applicable approved references may be highlighted and permanently tabbed before testing, and the NEC Handbook is permitted where applicable. Check the current Prov reference rules before test day, since the specified edition governs the answers.
No. Passing alone does not confer a local license or certification. Your jurisdiction sets its own requirements, and ICC's E2 transition is a separate application with its own fee and approval.
For a broader overview of what the credential represents and how it is used, see 2B Certification, and when you are ready to test your recall under the clock, run a set on the main practice site.