ICC Master Electrician Practice Test (R16)
International Code Council (ICC) · Pearson VUE · 2023 NEC
100 questions in 5 hours on the 2023 NEC, 70% to pass, with a worked explanation for every answer.
Or start with a free drillWhich ac system operating between 50 V and 1000 V is required to be grounded?
ICC R16 master electrician exam format
- License
- R16 Master Electrician (ICC)
- Board
- International Code Council (ICC)
- Testing vendor
- Pearson VUE
- Questions
- 100 multiple choice
- Time
- 5 hours, open book
- Pass mark
- 70% (ICC: most contractor/trades exams)
- References
- 2023 NEC and Ugly’s Electrical References (any edition)
- Fee
- $120 at Pearson VUE; wait 10 days to retake
- R16 is the 2023 NEC version. ICC still offers T16 (2020 NEC), G16 (2017 NEC) and F16 (2014 NEC) master electrician exams for jurisdictions that have not adopted the 2023 code; all four are 100 questions in 5 hours.
- Your licensing agency sets the pass mark it accepts; check its bulletin.
What the ICC R16 master exam covers
| Content area | Share |
|---|---|
| General knowledge (theory, load calculations, definitions, plan reading) | 12% |
| Services and service equipment | 16% |
| Feeders | 4% |
| Branch circuits and conductors | 16% |
| Wiring methods and materials | 19% |
| Equipment and devices | 10% |
| Control devices | 3% |
| Motors and generators | 8% |
| Special occupancies, equipment and conditions | 12% |
Our ICC R16 practice exam
ICC R16 Master Electrician: 100 questions in 300 minutes, 70% to pass. Questions follow the R16 content-area weights: wiring methods, services, branch circuits and calculations carry the most.
Warm up with the free calculations drill or a topic guide: load calculations, services, feeders and transformers, grounding and bonding, motor calculations, special occupancies, hazardous locations.
Sit the full exam under the real clock
100 questions in 5 hours on the 2023 NEC, 70% to pass, with a worked explanation for every answer.
Or start with a free drillCommon questions
What is on the ICC master electrician exam?
One hundred multiple-choice questions on the 2023 NEC: general knowledge and load calculations, services, feeders, branch circuits, wiring methods, equipment, control devices, motors and generators, and special occupancies.
Can I bring my code book to the ICC exam?
Yes. The exam is open book: the 2023 NEC and Ugly’s Electrical References (any edition) are the listed references.
How long must I wait to retake an ICC exam?
Ten days after a failed attempt.
My jurisdiction still uses the 2020 NEC. Which ICC exam applies?
ICC offers the T16 master electrician exam on the 2020 NEC in the same 100-question, 5-hour format. Your licensing agency tells you which version to schedule.
100 questions in 5 hours on the 2023 NEC, 70% to pass, with a worked explanation for every answer.
Or start with a free drillSources
- ICC National Contractor/Trades Examination Bulletin (published 6/30/2026)
- ICC Support: passing scores
Checked November 8, 2026.
Original independent practice. Not affiliated with or endorsed by NFPA, ICC, PSI, Pearson VUE or any licensing board. NEC is a registered trademark of the National Fire Protection Association. All master electrician exams