One exam, 100 questions
You need 70% overall. Calculations sit inside the outline areas rather than in a separate portion, and our full-length practice exam draws from each area in the same proportions.
ICC Master Electrician (R16)
100 scored · 300 min- General Knowledge (including plan reading)12
- Services16
- Feeders4
- Branch Circuits and Conductors16
- Wiring Methods and Materials19
- Equipment and Devices10
- Control Devices3
- Motors and Generators8
- Special Occupancies, Equipment, and Conditions12
Book the R series for the 2023 NEC
ICC still offers this exam on four NEC editions: the F (2014), G (2017), T (2020) and R (2023) series. Our questions are on the 2023 NEC. If you studied for the 2020 (T series) exam, these are rules that moved in the 2023 edition.
| Topic | 2020 NEC (T series) | 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.
Frequently asked questions
How is the ICC Master Electrician exam structured?+
ICC exam R16: 100 questions in 5 hours, open book, and you need 75%, a higher bar than the journeyman exam's 70%. It weighs services, branch circuits, wiring methods and general knowledge (including plan reading) more heavily than the journeyman outline.
Who accepts the national ICC electrician exams?+
ICC is not a licensing agency: each city, county or state decides which exam it accepts, and at which code edition. Many local jurisdictions that license electricians accept the ICC exams in place of their own testing, so check with yours before you book. Kentucky, Wyoming and South Dakota give their own state versions of these exams, and we have separate practice exams for each.
Is it open book?+
Yes. The references are the 2023 NEC and Ugly's Electrical Reference (any edition), and ICC allows any bound, copyrighted book at the test site. Know where the rules live: the exam rewards finding a section quickly as much as knowing it.
Where do I take it, and what does it cost?+
ICC gives the exams at Pearson VUE test centers for $120. After a failed attempt you wait 10 days before you can retest.
What do I need before I can sit the exam?+
ICC sets no experience requirement for the exam itself. The jurisdiction that issues your license sets its own experience, application and renewal rules, so confirm them with your city or county.
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