NEC Mastery
8000+ Questions & Explanations
| Revenue % | |||||
|---|---|---|---|---|---|
| Monthly | 3 | $9.35 – $10.45 | 24.8% | +18.0% | |
| 3 months | 3 | $24.99 – $26.15 | 24.8% | +18.0% | |
| Annual | 3 | $57.55 – $61.73 | 24.8% | +18.0% | |
| 6 months | 3 | $35.96 – $41.84 | 24.8% | +18.0% |
Description
Developed with insights from licensed electricians and instructors nationwide, NEC Mastery has helped thousands pass their certification exams. Built around the 2023 NEC Code with 2024 updates.
Prepare for your NEC Certification Exam with the most comprehensive study tool designed for Journeyman, Master Electricians, Electrical Contractors, Maintenance and Sign Electricians, Inspectors, and Examiners.
NOW IN ENGLISH AND SPANISH
Every question, calculator, reference table and help article is available in both languages. Terminology follows NFPA 70, Código Eléctrico Nacional — the official Spanish edition of the NEC — so what you study matches the exam you sit. Texas TDLR offers Spanish-language electrician exams through PSI against the 2023 NEC, which is exactly the edition this app is written to. Pick your language on first launch or change it any time in Settings; the whole app switches instantly, read-aloud voice included.
Quick Reference
Your pocket electrician's reference with 13 categories and 100+ items — all offline:
Electrical Formulas (Ohm's Law, AC/DC power, impedance, power factor)
Ampacity Tables (NEC 310.16, temperature derating, conduit fill adjustment)
Wire Properties & Insulation Types
Conduit Fill (EMT, RMC, PVC) & Conduit Bending
Box Fill Calculations
Voltage Drop Tables & Max Distance Lookups
NEMA Plug/Receptacle Configurations
Motor FLC Tables & Branch Circuit Sizing
Grounding (EGC & GEC Sizing, Electrode Types)
Transformer Formulas & OCPD Sizing
Electrical Symbols & Unit Conversions
Bookmark any reference, search by NEC article number or keyword, and jump directly to related calculators.
20 NEC Calculators
Professional-grade calculators with NEC code references:
Ohm's Law, Power Converter, Wire Size, Ampacity Derating, Voltage Drop, Conduit Fill, Box Fill, Breaker Sizing, EGC Size, GEC Size, Motor Circuit, Motor Feeder, Lighting Load, EV Charger Load, Residential Load, Commercial Load, Transformer OCPD, Transformer Conductor, Cover Depth, and Fault Current.
Electrician Hour Log
Track your apprentice or journeyman work hours:
12 work categories and 4 sector types
Dashboard with charts and goal tracking
PDF export for state board submissions
iCloud sync across all your devices
Books & Tools
Curated recommendations from working electricians — code books, test instruments, hand tools, and study guides.
Exams Covered
Master & Journeyman Electrician: F16, F17, G17, T17
Residential Electrician: F18, G18, T18
Maintenance & Sign Electricians: F19, F21, F22, F23
Electrical Contractor: F49
Inspectors & Examiners: E1, E2, E3
Why Choose NEC Mastery
8,000+ exam-style questions with answers, NEC references, and detailed explanations
Fully bilingual — English and Spanish, switchable at any time
20 professional NEC calculators for on-the-job use
Quick Reference with 100+ items — ampacity, formulas, NEMA configs, and more
Electrician hour log with iCloud sync and PDF export
Covers the 2023 NEC Code with 2024 updates
Choose your own syllabus — customize down to each individual article
Mock tests and performance tracking to simulate real exams
Instant feedback mode with explanations as you practice
Dark mode and adjustable text size
Study by Chapter
1 General · 2 Wiring and Protection · 3 Wiring Methods and Materials · 4 Equipment for General Use · 5 Special Occupancies · 6 Special Equipment · 7 Special Conditions · 8 Communications Systems
Who Is This App For?
Apprentices and licensed electricians, residential/commercial/industrial electricians, contractors, inspectors, safety managers, engineers, and field technicians.
Privacy Policy: https://www.webrichsoftware.com/privacy.html
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Join thousands of electricians who have passed their NEC exams with NEC Mastery.
Last collected from the App Store on