Missouri Electrical Contractor Exam Prep
Missouri’s statewide electrical contractor license is earned with the NASCLA Electrical Contractor exam, given by PSI for the Office of Statewide Electrical Contractors (OSEC). It has 100 scored questions, a 270-minute limit and an open-book format. You need 75 correct.
93%pass rate for JCR classroom students
20,000+electricians trained since 1985
50+ yearsin the trade for lead instructor Victor Ring
The exam accepts the 2020 or 2023 NEC. JCR’s package is built on the 2020 NEC and targets the Code and theory questions, 83 of the 100. The license itself is optional: you can keep working where you hold the required local license. Cities and counties must recognize the statewide license in place of a local contractor license.
The Missouri exam and license
NASCLA Electrical Contractor exam
- 100 scored questions · 270 minutes · 75 correct to pass
- $125 PSI fee, centers in Missouri and Kansas
- Code and theory 83, Safety 9, Project Design and Management 8
- Eligible for 2 years after OSEC approval, with unlimited retakes in that time
Statewide license requirements
- 12,000 hours installing equipment and wiring, or a shorter route with an apprenticeship, associate’s degree or electrical engineering degree
- $500,000 in liability insurance
- Local bonds where a city or county requires them
- Not required where you already hold the needed local license (RSMo 324.920.4)
Course fit: what JCR covers
JCR covers the NEC lookups, wiring, equipment and theory questions with timed 2020 NEC practice. Prepare on your own for the 9 safety questions (OSHA and NFPA 70E) and the 8 project design and management questions. Local rules such as city business licenses and permits are outside the exam. The NASCLA score also travels: see agencies that accept NASCLA.
The $495 package
Video lessons and digital practice exams open as soon as you buy. Printed materials ship the same business day.
How to get the Missouri statewide license
Missouri exam FAQ
What exam does Missouri use for electrical contractors?
PSI gives the NASCLA Accredited Trade Examination for Electrical Contractors for OSEC. Check OSEC’s approved exam list if you passed a different exam for another board.
Which NEC edition can I use?
The 2020 or 2023 NEC, or the NEC Handbook for either year. JCR teaches the 2020 NEC.
Is the Missouri electrical license exam open book?
Yes. Permanent tabs, highlighting and underlining are allowed. No writing in the books and no Post-its.
How many questions are on it?
100 scored questions, plus 10 unscored tryout questions. You need 75 correct.
Do Kansas City and St. Louis still license contractors?
Cities can keep their own licenses, but they must recognize the statewide license in place of a local contractor license. They can still require permits and local bonds.
How long should I study?
6–8 weeks, about an hour a night.
Office of Statewide Electrical Contractors · PSI Missouri NASCLA bulletin · RSMo 324.920 · RSMo 324.925
Watch how JCR teaches
More reading: Missouri electrical contractor license guide · NASCLA Electrical Contractor exam prep · exam requirements by state
Questions? Call (704) 696-8555 or email JCR.
Free practice: JCR quiz. It is general 2020 NEC practice, not Missouri or NASCLA exam questions.