Missouri Master Electrician
Practice the Missouri Master Electrician exam the way it is given — 51 questions weighted like the real outline, on the 2023 NEC, with every answer explained and cited.
One exam, 51 questions
You need 70% overall, so a strong area can carry a weaker one. Calculations are one area of the exam, and our full-length practice exam draws from every area in the same proportions.
Master Electrician (2023 NEC version)
51 scored · 180 min- Grounding and Bonding10
- General Knowledge of the Electrical Trade and Calculations5
- Service, Feeders, Branch Feeders and Overcurrent Protection5
- Raceways and Enclosures5
- Conductors6
- Motors and Controls4
- Utilization and General Use Equipment5
- Special Occupancies and Equipment6
- Low Voltage Circuits, Including Alarms and Communications2
- Safety3
About the Missouri Master Electrician
Granted by Missouri Office of Statewide Electrical Contractors
Missouri statewide Master Electrician exam (Prov, 2023 NEC version): 51 open-book questions in 3 hours, 70% to pass. The NEC is the only reference.
Eligibility Requirements
For the statewide electrical contractor license: 12,000 verifiable hours installing equipment and wiring; or 10,000 hours with a journeyman certificate from a U.S. Department of Labor–approved apprenticeship; or 8,000 hours with an associate degree from an accredited program; or 4,000 hours supervising installations with a four-year electrical engineering degree; or a Missouri local contractor or master license held for 6 of the past 8 years. You also need $500,000 of liability insurance (20 CSR 2117-2.010).
On the 2023 NEC since October 31, 2026
Study material written for the previous edition teaches these wrong. Every question here is grounded in the 2023 NEC.
| Topic | Previous edition | 2023 NEC |
|---|---|---|
| Non-dwelling general lighting unit loads220.42 | Table 220.12 | Table 220.42(A) |
| Lighting load demand factors220.45 | Table 220.42 | Table 220.45 |
| Non-dwelling receptacle demand factors220.47 | Table 220.44 | Table 220.47 |
| EV charging load in a load calculation220.57 | No rule | 7,200 VA or the nameplate, whichever is larger |
| Class 1 remote-control and signaling circuitsArticles 722, 724 | Article 725 | Article 724 (general rules in Article 722) |
What's Included
Every plan gets the same full-access study library.
Scheduling & Fees
Where to take it
- Administered by
- Prov
- Phone
- (801) 733-4455
- Scheduling window
- The Board decides which exam you take; then you schedule with Prov at one of 10 Missouri test centers or for remote testing.
- Retake policy
- You need 70%. Contact Prov or the Board about retakes.
Fees
- Prov exam fee
- $80
Keeping Your Certification Active
Renewal requirements
- Cycle
- Every three years, by September 30 (next in 2029)
Reciprocity
A local or other-state license whose exam the division approved can count toward the exam requirement (20 CSR 2117-2.010(2)).
Sources: Prov: Missouri Electrical Contractor Licensing exams · 20 CSR 2117-2 (statewide electrical contractor licensing) · Office of Statewide Electrical Contractors: approved examinations
Frequently asked questions
How is the Missouri Master Electrician exam structured?+
Prov exam, 2023 NEC version: 51 questions in 3 hours, open book, and you need 70%. Grounding and bonding is the largest area, with 10 questions. (The 2017 version has 60 questions.)
Which code edition is the exam on?+
Prov offers each Missouri exam in a 2017, 2020 and 2023 NEC version, and the Board decides which one you take. Our practice exam is on the 2023 version. The NEC of your version is the only reference.
Is it open book?+
Yes. You may bring the NEC edition your exam uses; no other reference is allowed in the exam.
Who gives the exam, and what does it cost?+
Prov gives the exams on computer at 10 test centers in Missouri, or remotely from home through Examroom.ai. The fee is $80, and you need 70% to pass.
What is the license for?+
The Office of Statewide Electrical Contractors issues an optional statewide electrical contractor license that Missouri cities and counties must recognize in place of their own contractor license. It requires a passing score on an approved journeyman-, master- or contractor-level exam, $500,000 of liability insurance and verified experience.
How often do I renew?+
Every three years, by September 30; the next renewal year is 2029.
Ready to pass your exam?
Practice the full exam on the current code, with every calculation worked out.
Start Studying Today →