# NEC Electrical Code Tools > Electrical code reference and calculation tool for professionals and students. (iPhone/iPad app by Yuhsiu Lai.) - Source: https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093 (this page in markdown: same URL + `.md`) - Developer: [Yuhsiu Lai](https://appshunter.io/developer/433114647) - Category: Education - Price: $4.99 - Rating: 1.25/5 from 4 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 8 MB - Languages: English - Released: 2011-10-05 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093/reviews.md ## What is NEC Electrical Code Tools? NEC Electrical Code Tools is a comprehensive reference and calculation app built for electrical professionals. Whether you're an electrician in the field, an engineer at the design table, or a student learning the National Electrical Code, this app puts essential NEC tools right in your pocket. Quickly size conductors, conduits, branch circuits, motor circuits, transformers, and generators using built-in calculators grounded in NEC requirements. Each module includes overviews, reference tables, and real-world case studies so you can understand the code — not just look it up. What's Inside: Conductor sizing and ampacity calculations. Conduit fill and bend radius tools. Branch circuit, feeder, and service sizing. Complete motor circuit design with an interactive schematic — tap any component to launch its calculator. Transformer engineering tools including delta-wye configurations and power factor correction. Generator capacity sizing with wiring diagrams. Grounding and bonding conductor sizing. Unit conversions for AWG, metric trade sizes, and circular mils. Code exhibits, formulas, and an illustrated requirements walkthrough. DC power simulation and electrical load calculation tools. Designed for the Job: Every calculator is purpose-built around NEC code articles so you can verify designs, check inspector requirements, and solve problems on the spot. The app works offline — no internet connection needed on the jobsite. Who It's For: Licensed electricians, electrical engineers, contractors, inspectors, journeymen, apprentices, and electrical engineering students. ## Key features - Conductor sizing and ampacity calculations - Conduit fill and bend radius tools - Motor circuit design with interactive schematic - Transformer engineering tools - Generator capacity sizing - Offline functionality ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/nec-electrical-code-tools/id469334093/reviews.md ### 1/5 — Impossible to use *2019-12-02* There are many problems with this app. How can I get a refund? ### 1/5 — Hard to use *2014-11-01* Has bugs that need to be worked out, not what I expected after I read the description. I cannot use it for much. I wish I had not spent the money. ### 1/5 — Needs some work *2014-09-13* Need to tilt your head side ways, screens are pinched towards the top half of the screen, the return button, is hidden or off the screen sometimes, Otherwise it's ok? ### 2/5 — Not anything like I expected. *2014-06-01* Nothing like what I expected from the app name and description. Wasted money. ### 5/5 — TT-Engineer *2013-03-31* Very useful application ## Frequently asked questions about NEC Electrical Code Tools ### What is NEC Electrical Code Tools? NEC Electrical Code Tools is a comprehensive reference and calculation app designed for electrical professionals. It provides essential tools and calculators grounded in National Electrical Code requirements for various electrical design and verification tasks. ### Who is NEC Electrical Code Tools for? This app is intended for licensed electricians, electrical engineers, contractors, inspectors, journeymen, apprentices, and electrical engineering students who need quick access to NEC information and calculation tools. ### Does NEC Electrical Code Tools work offline? Yes, the app is designed to work offline, meaning you do not need an internet connection to use its calculators and reference materials on the jobsite. ### What kind of calculations can I perform with NEC Electrical Code Tools? You can perform conductor sizing and ampacity calculations, conduit fill and bend radius calculations, branch circuit, feeder, and service sizing, motor circuit design, transformer engineering, and generator capacity sizing, among others. ### What is the price of NEC Electrical Code Tools? NEC Electrical Code Tools is a paid application, priced at $4.99. ### What is the rating for NEC Electrical Code Tools? NEC Electrical Code Tools has a rating of 1.3 stars based on 4 user ratings. ### When was NEC Electrical Code Tools last updated? The latest version of NEC Electrical Code Tools was updated on April 10, 2026. ### What age rating does NEC Electrical Code Tools have? NEC Electrical Code Tools has an age rating of 4+, indicating it is suitable for users aged 4 and above. ## Version history (last 2 releases) ### 8.0 — 2026-04-10 Fresh, modern interface with professional styling throughout the app. Updated for the latest iOS with full dark mode support. Improved navigation across all tools and calculators. New wiring diagram and interactive illustrative requirements walkthrough. Enhanced stability and performance. ### 7.0 — 2026-03-23 Support for the latest iOS releases. ## More apps by Yuhsiu Lai - [Availability and Reliability](https://appshunter.io/ios/app/availability-and-reliability/id435033141) - [Battery Capacity Calculator](https://appshunter.io/ios/app/battery-capacity-calculator/id445176473) - [48VDC Power System](https://appshunter.io/ios/app/48vdc-power-system/id449477913) - [Engineer's Toolset](https://appshunter.io/ios/app/engineers-toolset/id478486737) - [Battery Current Simulator](https://appshunter.io/ios/app/battery-current-simulator/id488430945) All apps by Yuhsiu Lai: https://appshunter.io/developer/433114647 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*