NEC Mastery

Webrich Software

In-app purchases

About this app

Developed with insights from licensed electricians and instructors nationwide, this app has helped thousands pass their exams and stay updated with the latest 2023 NEC Code and 2024 changes.

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.

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

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

Certifications Covered
- Commercial Electrical Inspector
- Journeyman Electrician
- Electrical Contractor
- Electrical Plans Examiner
- National Standard Journeyman Electrician
- National Standard Journeyman Sign Electrician
- National Standard Low Voltage Technician
- National Standard Maintenance Electrician
- National Standard Master Electrician
- National Standard Master Sign Electrician
- National Standard Residential Electrician

Why Choose NEC Mastery
- Over 8,000 exam-style questions with answers, references, and detailed explanations
- 20 professional NEC calculators for on-the-job use
- Quick Reference with 100+ items — ampacity, formulas, NEMA configs, and more
- Hour log with PDF export
- Covers the latest NEC Code (2023 Edition and 2024 Updates)
- Choose your own syllabus — customize down to each individual article
- Mock tests and performance tracking to simulate real exams
- Topic-based learning to focus on specific NEC categories
- Smart test algorithm with randomized questions
- Instant feedback mode with explanations as you practice
- Dark mode and adjustable text size

Study by Topics
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, and Industrial Electricians
- Electrical Contractors and Business Owners
- Inspectors and Safety Managers
- Electrical Engineers and Project Managers
- Maintenance Supervisors and Field Technicians

Privacy Policy: https://www.webrichsoftware.com/privacy.html

Join thousands of electricians who have passed their NEC exams with NEC Mastery. Download now and start preparing with confidence.

Ratings and reviews

a total scam. i purchased lifetime access. they are now saying i need to purchase a subscription and dont honor lifetime access.

awesome app, except I paid for a lifetime subscription and then they got money hungry like the rest everyone else and now we have to pay for a monthly subscription, this is garbage, the average person is already struggling to make it by these days and then you got these greedy money hungry people making us pay out of pocket even more, good job on loosing out on my business and probably many more.

This app is by far one of the best apps out there to prepare for any NEC exam. I took my E2 Certification studying solely using this app and I dominated that exam. It was an easy win! Highly recommend this app for anyone looking to prepare for their Journeyman license or Masters as well!

What’s new

NEC Mastery is now a complete electrician's toolkit — not just exam prep.
NEW — Quick Reference: 13 categories, 100+ offline items (ampacity, formulas, NEMA, conduit fill).
NEW — 20 NEC Calculators: wire size, voltage drop, box fill, motor circuits, fault current, and more — with code references.
NEW — Hour Log: track apprentice/journeyman hours, charts, PDF export, iCloud sync.