The exam
- 100 scored questions · 270 minutes · 75 correct to pass
- $125 PSI exam fee
- 2020 or 2023 NEC, or the NEC Handbook for either year
- Blueprint packet handed out at the test center
Missouri Electrical Contractor Exam Prep – NASCLA (2020 NEC)
$495.00
Missouri electrical contractor exam prep
Missouri’s statewide electrical contractor license uses the NASCLA Electrical Contractor exam: 100 scored questions, 4.5 hours, open book, 75 correct to pass.
PSI gives it at centers in Missouri and Kansas. You may bring the 2020 or 2023 NEC. This course teaches the 2020 NEC.
100 lessons21 hours of video
500+realistic mock exam questions
152-pageJCR workbook
PermanentCode tabs included
$495 full exam prep self-study package includes 20+ hours of video lessons (100 lessons, 21 hours), a 500+ question realistic mock exam (with digital access), the proprietary JCR workbook (152 pages) and permanent Code tabs. The 2020 NEC is sold separately.
Start the videos and digital practice exams the minute you check out. We ship the workbook the same business day.
Since 1985, JCR has trained 20,000+ electricians. Victor Ring, JCR’s lead instructor, has 50+ years in the trade. 93% pass rate for JCR classroom students.
Look inside the package
Tabs that NASCLA rules allow
The NASCLA exam permits permanent tabs, highlighting and underlining. Temporary tabs and Post-its must come out before the exam starts.
Missouri NASCLA exam facts
Where the 100 questions come from
- 83 Code and theory: General Code 17, Wiring and Protection 17, Wiring Methods 16, Equipment 13, Theory 11, Special Occupancies 8, Communications 1
- 9 Safety
- 8 Project Design and Management
What JCR covers: the 83 Code and theory questions. You practice 2020 NEC lookups and calculations against the clock. Study separately: the 9 safety questions (OSHA and NFPA 70E) and the 8 project design and management questions (the NASCLA business guide). Local items like city business licenses, bonds and permits are not on the exam.
What $495 gets you
- 21 hours of video, 100 lessons: Code navigation, theory and the calculations NASCLA asks.
- 500+ question realistic mock exam: on paper and in a digital app, with answers.
- 152-page proprietary JCR workbook: a six-week plan, worked problems and answer keys.
- Permanent Code tabs: find the high-use articles and tables faster.
Not included: the NEC and the safety and business references. Get the 2020 NEC here.
Exam rules and official sources
| Testing company | PSI, under contract with Missouri’s Office of Statewide Electrical Contractors (OSEC) |
|---|---|
| Format | Open book, computer-based |
| Questions | 100 scored, plus 10 unscored tryout questions |
| Time | 270 minutes (4.5 hours) |
| To pass | 75 correct |
| Books | 2020 or 2023 NEC (or NEC Handbook), plus the OSHA, NFPA 70E, Ugly’s and NASCLA business references in the PSI bulletin |
| Book prep | Highlight, underline and add permanent tabs ahead of time. No writing in books, no loose papers, no Post-its. |
| Calculator | Silent, nonprinting, nonprogrammable |
| Retakes | Eligibility lasts 2 years from OSEC approval. Retest as often as needed in that window. |
PSI Missouri NASCLA bulletin · Office of Statewide Electrical Contractors · RSMo 324.920 · 20 CSR 2117-2 · PSI Missouri scheduling
Steps to a Missouri statewide license
- Qualify. 12,000 hours installing equipment and wiring, or a shorter route: 10,000 hours plus a DOL-approved apprenticeship journeyman certificate, 8,000 hours plus an associate’s degree, or 4,000 supervising hours plus a four-year electrical engineering degree. Carry $500,000 in liability insurance.
- Apply to OSEC. OSEC decides eligibility, not PSI.
- Book the exam. After OSEC approves you, you get instructions to pay PSI and schedule.
- Pass and get licensed. Missouri cities and counties must recognize the statewide license in place of a local contractor license. They can still require permits and local bonds.
More detail: JCR’s Missouri electrical contractor license guide.
Shipping and access
Video and digital mock exam access starts right after checkout. The printed package ships the same business day.
Call JCR at (704) 696-8555 or email us with questions.
Missouri electrical contractor exam questions
Do I need the Missouri statewide license? Not always. Under RSMo 324.920.4, you can keep working where you hold the required local license, or where no local license is required. The statewide license helps if you work in many cities and counties.
Which NEC edition is on the Missouri exam? You choose the 2020 or 2023 NEC. This course teaches the 2020 NEC, so bring that edition.
Is it open book, and can I use tabs? Yes to both. Permanent tabs, highlighting and underlining are fine. Post-its and handwritten notes are not.
How many questions, and what is passing? 100 scored questions in 4.5 hours. You need 75 correct.
Who gives the exam? PSI, for Missouri’s Office of Statewide Electrical Contractors, at centers in Missouri and Kansas.
How long should I study? 6–8 weeks, about an hour a night.
“I am very proud to have passed the 1st time. I appreciate your help and guidance with the exam prep and found it really helpful.”
— AlexLicensed in more than one state? Your NASCLA score can also go to other agencies that accept it. See NASCLA Electrical Contractor exam prep and the list of agencies that accept NASCLA.
$495 for the full package
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Related: Missouri electrical contractor license guide · Electrician exam requirements by state
Curious where you stand? The free quiz is general 2020 NEC practice. It is not a copy of the NASCLA exam.
Take the free 2020 NEC practice quiz