Oklahoma Unlimited Electrical Contractor exam: format, NEC edition and fee
Oklahoma has no license called master electrician. Its top electrical license exam is the Unlimited Electrical Contractor exam, set by the Construction Industries Board (CIB) and run by PSI. These facts come from PSI's Oklahoma bulletin (effective 9/11/2026), read on 8 November 2026. Oklahoma sets its own rules and can change them, so confirm with the CIB and the bulletin before you book.
The exam in brief
- Exam: Unlimited Electrical Contractor
- Vendor: PSI
- NEC edition: 2023, as adopted in Oklahoma
- Questions: 100 scored items. Up to 10 unscored trial questions may be added.
- Time: 240 minutes
- Passing score: 70%
- Book: open book. Highlighting, underlining and indexing done beforehand, permanent tabs only, no writing. OSHA's construction standards (29 CFR 1926) and Ugly's Electrical References are allowed. No NEC Handbook and no spiral-bound NEC.
- Calculator: a silent, non-printing, non-programmable calculator is allowed.
- Fee: $92 for each exam portion. After a failed electrical exam, wait 30 days to retest.
- Business and law: the bulletin also lists a separate Electrical Business and Law exam (50 scored items, 120 minutes, 70%) on bidding, project management, contracts, finance, labor, risk, payroll and licensing. Ask the CIB whether your license needs it.
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Grounding and Bonding
A service with 350 kcmil copper conductors has a GEC that runs only to two driven ground rods. Table 250.66 would give 2 AWG copper for these service conductors. What is the largest GEC the rods require?
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What it covers
The bulletin defines the contractor exam by its scope: the design, plan, layout, installation, repair and alteration of electrical systems. Its outline uses the same 13 areas and item counts as Oklahoma's Unlimited Electrical Journeyman exam: 10 items each on general electrical knowledge, installation requirements, services, feeders and branch circuits, grounding and bonding, special occupancies and lighting and signs; 9 on overcurrent protection; 8 on conductors; 7 on raceways and boxes; 6 on motors and transformers; 4 each on general knowledge and safety; and 2 on low voltage and alarms. Our master exam outline maps these into the twelve areas states share.
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How our practice exam fits
Our master practice exam is written to the 2023 NEC, the edition Oklahoma tests, and runs 100 questions in 240 minutes, the length and time in Oklahoma's bulletin. It is not Oklahoma's exam: its weights lean further toward load, service and motor calculations than Oklahoma's outline, and it does not cover Oklahoma's permit and inspection items or the separate business and law exam.
Take the free 10-question master electrician check. It is written to the 2023 NEC, needs no signup, explains every answer and names your weakest area.
Not affiliated with or endorsed by NFPA, PSI or Prov, or the Oklahoma Construction Industries Board. NEC and National Electrical Code are registered trademarks of NFPA.
Sources
Show the list
- Testing and exam information, Oklahoma Construction Industries Board. Retrieved 8 Nov 2026.
- Oklahoma candidate information bulletin, PSI, effective 9/11/2026. Retrieved 8 Nov 2026.
Facts come from the sources listed above. If something has changed, tell us and we will correct it within 2 business days.
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