- CET is issued by NAEC's Certification Board and has held ISO/IEC 17024 accreditation since 2011.
- The exam is 160 computer-based multiple-choice questions, scored 100-500, with 300 needed to pass.
- Maintenance is the heaviest domain at 24 of 160 questions, followed by Electric Traction at 23.
- Candidates qualify via a training program or by documenting 10,000 hours / five years of field experience.
What CET Actually Stands For
In the elevator industry, CET stands for Certified Elevator Technician. It's a personnel certification credential for people who install, maintain, and repair elevators, escalators, and related conveyance equipment. If you've landed here searching for a quick definition, this is it - and if you want the deeper breakdown of the acronym itself, see our companion piece on CET Meaning or the shorter explainer at What Does CET Stand For?
This is worth stating plainly because "CET" is used as shorthand by several unrelated credentials in other industries. On this site, and in this article specifically, CET refers exclusively to the elevator trade certification described below - nothing else.
Who Issues the CET Credential
CET is issued by the National Association of Elevator Contractors (NAEC), with all certification decisions made by the NAEC Certification Board. This isn't a marketing badge from a training vendor - the program has carried ISO/IEC 17024 personnel certification accreditation since 2011, granted through ANSI and the ANSI National Accreditation Board. That accreditation means the exam development, scoring, and governance process follows an internationally recognized standard for how personnel certifications should be built and maintained.
For a full walkthrough of the credential's structure, eligibility rules, and governance, see CET Certification.
Exam Format and Delivery
The CET certification exam is a 160-question, computer-based, multiple-choice test. It's delivered online under proctoring that NAEC arranges after a candidate receives an Authorization to Test (ATT) letter. The exam is offered in English only, so there is no accommodation for non-English test delivery.
Scoring runs on a 100 to 500 scale, and a candidate needs a 300 to pass. If you don't pass, you're not left guessing why - NAEC provides a category-level diagnostic report that shows how you performed on each topic area, which is genuinely useful for targeting a retest. For the full mechanics of what "300" actually represents on that scale, read CET Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Because the diagnostic report breaks results down by category, a failed first attempt isn't wasted - use it to identify which of the 11 domains cost you the most points before you register for a retest.
The 11 CET Exam Domains
The 160 questions are distributed unevenly across eleven content areas. Understanding the weighting is one of the most tactically important things a candidate can do, because it tells you exactly where your study hours produce the most return.
| Domain | Weight | Approx. Questions |
|---|---|---|
| Maintenance | 15% | 24 |
| Electric Traction | 14% | 23 |
| Safety | 13% | 20 |
| Hydraulic | 12% | 20 |
| Controls | 12% | 19 |
| Hoistway | 10% | 16 |
| Car Enclosure | 6% | 10 |
| Escalators | 5% | 8 |
| Special Applications | 5% | 8 |
| Job Site | 4% | 6 |
| Lifts | 4% | 6 |
Maintenance
The single largest domain at 24 of 160 items. Candidates need working knowledge of routine maintenance procedures, lubrication schedules, and troubleshooting drawn from the Elevator Maintenance Manual.
- Preventive maintenance intervals and documentation
- Common wear-point diagnostics
Electric Traction
The second-largest domain at 23 questions. Expect coverage of traction machines, sheaves, ropes, governors, and related code requirements under ASME A17.1.
- Traction machine components and function
- Rope and sheave inspection criteria
Together, Maintenance and Electric Traction account for nearly a third of the exam, so a study plan that shortchanges either one is taking on unnecessary risk. For a domain-by-domain breakdown of every content area with study priorities for each, see CET Exam Domains 2026: Complete Guide to All 11 Content Areas.
Eligibility Pathways
You can't just register and sit for the CET exam - NAEC requires that candidates qualify through one of two routes before they're issued an Authorization to Test:
- Education pathway: Completion of the NAEC CET Education Program, NEIEP, L.I.T.S., or an equivalent recognized training program.
- Experience pathway: Documentation of a minimum of 10,000 hours or five years of on-the-job elevator industry training, measured as of December 31, 2007.
Regardless of pathway, applicants must also demonstrate knowledge of four core references: the Elevator Industry Field Employees' Safety Handbook, the Elevator Maintenance Manual, the NEMI Installation Manual, and ASME A17.1 and A17.3. These aren't optional background reading - they are the source documents the exam questions are written from. A full breakdown of qualification rules lives in CET Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Fees and Retesting Rules
Application fees depend on your pathway and your employer's NAEC membership status, and all fees are non-refundable:
- Experience pathway: $680 for employees of NAEC member companies, $1,095 for non-members.
- Education pathway: $95 for members, $145 for non-members.
If you don't pass on the first attempt, NAEC's retesting rules impose escalating waiting periods:
- A 30-day wait is required before a second attempt.
- A further 30 days plus a $100 retest fee is required before a third attempt.
- After a third failure, candidates must wait 180 days before reapplying.
For a complete cost comparison across pathways, including how the renewal fee stacks up over time, see CET Certification Cost 2026: Complete Pricing Breakdown.
Certification Term and Renewal
CET certification isn't permanent. It runs on a one-year cycle and expires every December 31, regardless of when during the year you were certified - though credentials issued after October 1 get a grace extension and renew by December 31 of the following year instead.
To maintain the credential, certified technicians must complete 10 contact hours of NAEC-approved continuing education annually, of which 1 to 3 hours must specifically cover safety topics. Renewal also carries a fee: $105 for NAEC members, $195 for non-members.
Key Takeaway
Because the certification year ends December 31 no matter when you passed, technicians certified early in the year effectively get a shorter first cycle - plan your continuing education hours accordingly rather than waiting until the fall.
The CET Education Program
Separate from the certification exam itself, NAEC also runs the CET Education Program, a four-year, 12-course track aligned with NAEC's DOL-approved apprenticeship standards. It combines roughly 611 classroom hours with about 8,000 field hours, and progression through the program requires passing unit and level exams at 75% or higher.
One notable milestone inside this program: technicians who pass the Level 1 exam earn the Associate Elevator Technician (AET) designation, a recognized step on the way toward full CET eligibility. For more on what training and coursework look like in practice, see CET Training.
Who Holds CET and Why It Matters
CET is held by working elevator mechanics, installers, and maintenance technicians employed by elevator contractors - both NAEC member firms and independent shops. Because the credential is tied to a specific, code-referenced body of knowledge (the safety handbook, maintenance manual, installation manual, and ASME codes), employers and building owners use it as a signal that a technician can be trusted on live equipment without close supervision.
If you're evaluating whether pursuing CET makes sense for your career trajectory, two resources go deeper than this overview: CET Salary Guide 2026: Complete Earnings Analysis covers earnings considerations, and Is the CET Certification Worth It? Complete ROI Analysis 2026 weighs the costs against the career upside. For a sense of what roles typically expect or prefer the credential, see CET Jobs.
Preparing for the Exam
Given that Maintenance (24 questions), Electric Traction (23), Safety (20), Hydraulic (20), and Controls (19) make up the bulk of the 160-item exam, a sensible prep sequence front-loads those five domains before moving to the lighter-weighted areas like Escalators, Special Applications, Job Site, and Lifts, which each carry only 4-8 questions.
Maintenance & Electric Traction
- Review Elevator Maintenance Manual procedures
- Study traction machines, sheaves, ropes, and governors
Safety, Hydraulic & Controls
- Work through the Safety Handbook and relevant ASME A17.1/A17.3 sections
- Study hydraulic system components and controller logic
Hoistway & Car Enclosure
- Cover hoistway equipment and car construction topics
- Cross-reference NEMI Installation Manual sections
Lighter Domains & Full Review
- Cover Escalators, Special Applications, Job Site, and Lifts
- Take timed practice sets across all 11 domains
Spaced review across these weeks matters more than cramming, since the exam pulls from four dense reference documents rather than a single textbook. For a structured, week-by-week plan built specifically around this weighting, read CET Study Guide 2026: How to Pass on Your First Attempt, and if you want a realistic sense of how difficult candidates find the exam, see How Hard Is the CET Exam? Complete Difficulty Guide 2026. You can also run timed practice questions modeled on the real domain weighting at CET Exam Prep to see where your diagnostic gaps are before test day.
Data-minded candidates often also want to know how other test-takers perform; CET Pass Rate 2026: What the Data Shows covers what's actually published, and CET Exam Dates 2026: Testing Windows, Deadlines & Scheduling covers scheduling logistics once your Authorization to Test arrives. For a condensed reference you can review the night before, bookmark the CET Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Frequently Asked Questions
CET stands for Certified Elevator Technician, a credential issued by the National Association of Elevator Contractors (NAEC). See What Is A CET? for more on what the title means for a working technician.
The exam has 160 multiple-choice questions delivered by computer under proctoring. Scores are reported on a 100 to 500 scale, and a 300 is required to pass.
You qualify either by completing the NAEC CET Education Program, NEIEP, L.I.T.S., or an equivalent program, or by documenting at least 10,000 hours or five years of on-the-job elevator industry training as of December 31, 2007.
Certification runs for one year and expires December 31, regardless of when in the year it was issued (with a grace extension for credentials issued after October 1). Renewal requires 10 hours of continuing education annually, including 1 to 3 safety hours, plus a renewal fee.
You receive a category-level diagnostic report showing your performance by topic. You must wait 30 days before a second attempt, another 30 days plus a $100 fee before a third attempt, and 180 days before reapplying after a third failure.