NEC® Exam Prep · 2017 · 2020 · 2023 · 2026
Sentinel Learning
The future of the trades.
The code book instructor that never clocks out.
Master electricians know where to look. Now you will too.
Updated for the 2026 NEC, including load calculations moving to Article 120.
Sentinel Learning Pro
$39.99/month after a 7-day free trial. Cancel anytime.
- Sentinel Volt code lookups for your NEC edition
- Timed practice tests matched to your NEC edition
- 2-minute speed-find drills
- Course lessons and quizzes with progress tracking
By subscribing you agree to the Terms of Service.