- What This Cheat Sheet Covers
- The Core Numbers Every Candidate Must Know
- Level 1 Domain Weight Cheat Sheet
- What's Actually on the Test: Top Domains
- Performance Profiles: The Hands-On Half
- Levels 2, 3, and 4 at a Glance
- Calculator and Testing Center Rules
- A Domain-Weighted Final Review Schedule
- Prerequisites Quick Reference
- FAQ
- Level 1 has 103 items, a three-hour limit, and a 70 minimum passing score - the same passing score used at every level.
- Wireways, Raceways, and Fittings is 18% of Level 1 (19 of 103 items) - the single heaviest domain by far.
- Nine of twelve Level 1 modules require a hands-on Performance Profile in addition to passing the written test.
- Only a basic-function non-printing calculator built into the NCCER Testing System is allowed; specialty calculators are prohibited.
What This Cheat Sheet Covers
This is a compressed, one-page-style reference for candidates who already understand the basics of the NCCER Electrical program and want a fast final check before test day. It is not a substitute for working through the curriculum modules - for that, see our full Electrical Levels 1-4 Study Guide - but it is exactly what you should skim the night before, or in the parking lot, before you sit for the closed-book exam at an NCCER-accredited assessment center.
Everything below is specific to the NCCER Electrical curriculum: the four-level structure, the Level 1 domain weights, the Performance Profile requirement, and the testing-system rules that govern what you can and cannot bring into the room. If you want the deep-dive version of any single domain, that lives in our Electrical Levels 1-4 Exam Domains Guide.
The Core Numbers Every Candidate Must Know
Memorize these before anything else. They determine your pacing strategy and tell you exactly what "done studying" looks like.
- 103 items on the Level 1 Test - a comprehensive exam pulling from all twelve modules at once, not a per-module quiz.
- Three-hour time limit - the same limit applies to Levels 2, 3, and 4, all using the same closed-book format.
- 70 minimum passing score - consistent across all four levels. There is no domain-by-domain minimum; it's an overall score.
- Closed-book, always - no papers, books, notes, or study materials of any kind are permitted at any level.
- Score reports post to your NCCER account - you don't get a paper printout at the desk; your results and credential status live in your candidate profile.
If you're unsure how these numbers translate into an actual study plan, our article on the Electrical Levels 1-4 Passing Score breaks down what 70 actually means in practice, and How Hard Is the Electrical Levels 1-4 Exam? puts that number in context against the domain weights below.
Level 1 Domain Weight Cheat Sheet
Level 1's 103 items are not distributed evenly across the twelve modules. Three domains alone account for well over a third of the test. Study time should mirror this table, not your personal comfort level with any one topic.
| Domain | Weight |
|---|---|
| Wireways, Raceways, and Fittings | 18% |
| Residential Wiring | 12% |
| Hand Bending | 9% |
| Safety For Electricians | 9% |
| Outlet, Device, Pull, and Junction Boxes | 9% |
| Conductors and Cables | 9% |
| Introduction to Electrical Circuits | 7% |
| Electrical Theory | 7% |
| Introduction to the National Electrical Code | 7% |
| Basic Electrical Construction Documents | 6% |
| Electrical Test Equipment | 4% |
| Occupational Overview: The Electrical Industry | 3% |
Key Takeaway
Wireways, Raceways, and Fittings alone is worth almost one-fifth of your final score. If you only have time to master three domains before test day, make them Wireways/Raceways/Fittings, Residential Wiring, and Hand Bending - together they cover 39% of the exam.
What's Actually on the Test: Top Domains
Domain names on paper don't always tell you what to actually study. Here's what each of the three heaviest Level 1 domains really tests.
Wireways, Raceways, and Fittings (18%)
This is the single largest topic on the Level 1 Test, carrying 19 of 103 items. It covers conduit types, fittings, sizing, fill calculations, and the code-driven rules for installing raceway systems correctly.
- Know conduit and raceway type identification cold - questions often hinge on recognizing the correct application for EMT, rigid, PVC, and similar systems.
- Expect scenario-based items referencing installation methods rather than pure definitions.
Residential Wiring (12%)
With 13 items, this is the second-heaviest domain and covers branch circuits, device wiring, and residential-specific installation practices.
- Review circuit layout logic for typical residential rooms and service areas.
- Pay attention to device and outlet placement rules that tie back into the Boxes Performance Profile module.
Hand Bending (9%)
10 items on the written test, plus a corresponding Hand Bending Performance Profile you must pass hands-on. This dual written-and-practical weight makes it disproportionately important relative to its 9% share.
- Study bend types (offset, saddle, 90-degree stub) and the math behind them, not just definitions.
- Because it's also a Performance Profile module, written knowledge and physical technique need to match.
For a domain-by-domain walkthrough of every one of the twelve areas - including the lighter-weighted ones like Electrical Test Equipment and Occupational Overview - see the full Electrical Levels 1-4 Exam Domains Guide.
Performance Profiles: The Hands-On Half
Passing the written Level Test is only part of earning the Level 1 credential. Nine of the twelve Level 1 modules also carry a hands-on Performance Profile that must be completed separately before your credential is issued:
- Safety
- Introduction to the NEC
- Boxes
- Hand Bending
- Wireways and Raceways
- Conductors and Cables
- Construction Documents
- Residential Wiring
- Test Equipment
Notice the overlap: five of these nine also happen to be among the heaviest domains on the written test (Safety, Wireways and Raceways, Conductors and Cables, Residential Wiring). Studying for the written exam and preparing for the practical evaluations reinforces the same material twice - treat them as one combined study effort, not two separate tracks.
Levels 2, 3, and 4 at a Glance
Once Level 1 is behind you, each subsequent level builds on the last, following U.S. Department of Labor apprenticeship standards. All four levels share the same testing mechanics - closed-book, three-hour limit, 70 minimum passing score, delivered through the NCCER Testing System - but the content shifts significantly.
| Level | Core Content Focus | Curriculum Notes |
|---|---|---|
| Level 1 | Safety, NEC intro, boxes, hand bending, raceways, conductors, documents, residential wiring, test equipment | 103 items, 12th Edition (2026 NEC) |
| Level 2 | Alternating current, motors, lighting, conduit bending, grounding and bonding, terminations, control systems | 12th Edition (2026 NEC) |
| Level 3 | Load calculations for branch and feeder circuits, conductor selection, practical lighting applications, hazardous locations, overcurrent protection | 155 hours of curriculum, 12th Edition (2026 NEC) |
| Level 4 | Advanced topics building on Levels 1-3 | Remains on the 11th Edition |
Every level test is comprehensive and closed-book, combining items from every module within that level into a single exam - there's no separate quiz per module. Each level also requires successful completion of the level before it, plus the NCCER Core Curriculum taken before or alongside Level 1. Full eligibility details live in our Electrical Levels 1-4 Requirements guide.
Calculator and Testing Center Rules
Because this is a closed-book exam administered at an NCCER-accredited training and assessment center, the allowed materials list is short and strict:
- Allowed: a basic-function, non-printing calculator - one is already built directly into the NCCER Testing System, so you typically don't need to bring your own.
- Not allowed: papers, books, notes, study materials, or any specialty/programmable calculators.
If your exam involves load calculations (more relevant at Level 3) or bending math (Level 1's Hand Bending domain), practice doing that math with only a basic-function calculator so the built-in tool doesn't slow you down on test day.
A Domain-Weighted Final Review Schedule
In the final stretch before your exam date, allocate review time proportionally to domain weight rather than personal preference. This short timeline assumes you've already completed your training modules and are in pure review mode.
Heaviest domains first
- Wireways, Raceways, and Fittings (18%) and Residential Wiring (12%) - combined, 30% of the test
- Cross-reference with the corresponding Wireways and Residential Wiring Performance Profiles
The 9% cluster
- Hand Bending, Safety For Electricians, Outlet/Device/Pull/Junction Boxes, Conductors and Cables
- These four domains together equal 36% of the exam - treat them as equally serious as the top two
The 7% group
- Introduction to Electrical Circuits, Electrical Theory, Introduction to the National Electrical Code
- Focus on terminology and code-reference navigation rather than memorization
Lighter-weight domains
- Basic Electrical Construction Documents (6%), Electrical Test Equipment (4%), Occupational Overview (3%)
- Quick review only - don't overinvest time relative to their point value
Full practice exam and rules review
- Take a full-length timed practice test on the main practice test site to simulate the three-hour, closed-book format
- Reconfirm what's allowed at your testing center: basic calculator only, nothing else
This schedule is intentionally short - for the full multi-week version tied to a first-attempt pass strategy, see our Electrical Levels 1-4 Study Guide.
Prerequisites Quick Reference
Before you're eligible to sit for Level 1, or before that credential can be issued alongside your Level 1 test, you need the NCCER Core Curriculum - taken before or concurrently with Electrical Level 1. After that:
- Level 2 requires successful completion of Level 1.
- Level 3 requires successful completion of Level 2, and covers 155 hours of curriculum focused on load calculations, conductor selection, lighting applications, hazardous locations, and overcurrent protection.
- Level 4 requires successful completion of Level 3.
Because credentials and score reports post directly to your NCCER account, you can track your progression through all four levels in one place without relying on paper certificates. For a complete rundown of how the eligibility chain works, read Electrical Levels 1-4 Requirements.
To build broader context around where this credential fits - what employers look for, how it connects to job placement, or whether it's worth pursuing at all - see Is the Electrical Levels 1-4 Certification Worth It? and Electrical Levels 1-4 Jobs. And once you're ready to test your recall against real exam-style questions, our practice test platform mirrors the closed-book, timed format described throughout this cheat sheet.
FAQ
The Electrical Level One Test, 11th Edition, has 103 items with a three-hour time limit, and requires a minimum passing score of 70.
Yes. All four levels use the same closed-book, three-hour format with the same 70 minimum passing score.
Only a basic-function, non-printing calculator is permitted, and one is already built into the NCCER Testing System. Specialty or programmable calculators are prohibited, along with all papers, books, and notes.
Yes. Nine of the twelve Level 1 modules also require a hands-on Performance Profile - Safety, Introduction to the NEC, Boxes, Hand Bending, Wireways and Raceways, Conductors and Cables, Construction Documents, Residential Wiring, and Test Equipment - which must be completed before the level credential is issued.
Wireways, Raceways, and Fittings is the heaviest domain at 18% of the Level 1 Test (19 of 103 items), followed by Residential Wiring at 12% and Hand Bending at 9%. Together these three domains cover well over a third of the exam.