VoltPrep Electrician Exam Prep
1,000 practice questions for the journeyman and master electrician exams.
One purchase. No subscription. 1,000 questions.
VoltPrep is electrician exam prep for the residential, journeyman, and master tests — and Pro is a single one-time unlock, not a monthly bill. Buy it once, keep it for good, use it entirely offline.
WHAT YOU GET
• 1,000 practice questions across eleven exam topics
• Worked explanation and code article reference on every question
• Timed Residential, Journeyman, and Master mock exams
• Exam Readiness score weighted to the real topic split
• Spaced-repetition flashcards and an automatic review deck
• Field calculators and a formula sheet
• Full-text search of the entire question bank
• Per-topic mastery tracking, streaks, and a daily challenge
TOPICS COVERED
Electrical theory, calculations, grounding and bonding, wiring methods and materials, overcurrent protection, motors and controls, transformers, services and load calculations, safety and OSHA practice, code definitions, and special occupancies.
STUDY THAT DOESN'T CHEAT YOU
Answer choices reshuffle every session, so you learn the material rather than the position of the right answer. Explanations tell you why — not just what.
WORKS WITH NO SIGNAL
Everything is on the device. No account, no sign-up, nothing to sync.
Free questions in every topic so you can judge it before paying.
Video
VoltPrep Electrician Exam PrepScreenshots
Free calculators
Try the tools in your browser. The app has them offline.
Try a few questions first
A question of the day and a 10-question sample with explanations. The full question bank and the timed mock exams are in the app.
How-to guides
How to Apply the NEC 3% Voltage Drop Rule
Why voltage drop matters, where 3% is only a recommendation, the K-factor formula with a worked example, and the fixes.
5 min readHow to Size Wire for a 50-Amp EV Charger
The 125% rule, 6 AWG vs 8 AWG copper, aluminum runs, voltage drop and GFCI for a 40 A or 48 A Level 2 charger.