NEC Mastery

19-Aug-2026

Webrich Software

3.78

10 reviews

1,000+
Downloads

Free

8000+ NEC exam questions, 20 calculators & quick reference for electricians.

Download from Google Play

About NEC Mastery

NEC Mastery is an education app developed by Webrich Software.

Download Statistics

NEC Mastery has been downloaded 3.9 thousand times. In the last 30 days, the app was downloaded 99 times.

User Ratings

NEC Mastery is rated 3.78 out of 5 stars. The rating is based on 10 ratings.

App Information

NEC Mastery is FREE to download. The APK download size is 24.98 MB. The latest version available is 19-Aug-2026. The last update was on August 19, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play October 2024.

Description

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.

Recent changes:
Fixes an issue where the full version could show as locked even with an active subscription.

The app now remembers your subscription between launches, re-checks with Google Play every time you open it, and adds a Restore Purchase button to the upgrade screen. Clearer messages when Google Play cannot be reached.

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More data about NEC Mastery

Price	Free to download
Total downloads	3.9 thousand
Recent downloads	99
Rating	3.78 based on 10 ratings
Ranking	Not ranked
Version	19-Aug-2026
APK size	25.0 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Get PDF Report — $29

Alternative downloads for the NEC Mastery app

NEC Mastery compared with similar apps

Common keywords of similar apps

Standard Calculators Exams Maintenance Sign Sizing Residential Mastery Quick Inspectors Categories Formulas Power Ampacity Types Voltage Transformer Commercial Special Licensed Thousands Latest Contractors Examiners Items Law Derating Box Drop Nec Electrician Electrical Electricians National Journeyman Reference Fill Master Conduit Size Load Exam Questions App Code Tables Motor Study Wire

Keywords missing from this app

Wiring Prep Test Calculations Practice Calculation Calculator Chapter Find Contractor Table Current Sizes Features Pass Time Recent Transformers Electric Wires Step Diagrams Based References Grounding Calculate Performance Phase Number Conductors

Google Play Rating history and histogram

Rating history

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Downloads over time

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NEC Mastery has been downloaded 3.9 thousand times. Over the past 30 days, it has been downloaded 99 times.

Changelog of NEC Mastery

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Developer information for Webrich Software

Webrich Software

support@webrichsoftware.com

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Comments on NEC Mastery for Android

★★★★★ Danny A Alvarez · Jul 9, 2025

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!

★★★★☆ Brandon Gonzalez · Feb 16, 2025

NEC Electrician Exam Prep is a fantastic resource! The practice questions are well-structured and closely mimic the actual exam format. The explanations are thorough, helping me grasp complex concepts easily. This app is a must-have for anyone preparing for their electrician certification!

★☆☆☆☆ corey henderson · Apr 6, 2026

A total scam. I purchased lifetime access. They are now saying I need to purchase a subscription and don't honor lifetime access.

★★☆☆☆ Jay · Aug 24, 2026

There are a lot of answers to questions and vice versa that are not correct and inaccurate to the book itself. A lot of typos are on the app as well, so when using this app to study for your tests, it makes it very difficult to be accurate and feel you are making progress, when this app provides misinformation. How funny, being this is the NEC app and not even this is good enough to study for NEC based tests.

★★☆☆☆ Jonathan Saiz · Oct 20, 2025

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.

Google Play Rankings for NEC Mastery

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Technologies used by NEC Mastery

6 permissions

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