# NG Wire: NEC Ampacity & Fill — Grounding Size, Motor, & Cover > Electrical construction NEC® tables and conduit fill calculations for professionals. (iPhone/iPad app by NG Orange LLC.) - Source: https://appshunter.io/ios/app/ng-wire-nec-ampacity-and-fill/id6478354523 (this page in markdown: same URL + `.md`) - Developer: [NG Orange LLC](https://appshunter.io/developer/1732601190) - Category: Productivity, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 9 App Store ratings · 7 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 13 MB - Languages: American English - Released: 2024-07-09 - Data updated: 2026-08-10 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/ng-wire-nec-ampacity-and-fill/id6478354523/reviews.md ## What is NG Wire? NG Wire™ is a professional NEC® reference and calculation app for electrical engineers, electricians, designers, inspectors, and contractors. Quickly look up ampacity, grounding conductor sizes, minimum cover requirements, motor data, and perform conduit fill calculations. Designed for speed, NG Wire™ delivers the information you need with just a few taps, eliminating the need to manually navigate multiple NEC® tables. Whether you're designing in the office or reviewing installations in the field, the app helps you find accurate information in seconds while reducing the chance of calculation or lookup errors. No more flipping through printed code books or searching PDF tables while on the job. NG Wire™ includes 11 of the most commonly used NEC® tables and calculation tools: 1. Wire Ampacity 2. Ambient Temperature Correction Factors 3. More Than 3 Conductors in Conduit Adjustment Factors 4. Equipment Grounding Conductor (EGC) Sizing 5. Grounding Electrode Conductor (GEC) Sizing 6. Upsized Equipment Grounding Conductor (EGC) Sizing 7. Conduit Fill Tables 8. Conduit Fill Calculations 9. Minimum Cover Requirements 10. Single-Phase Motor Data 11. Three-Phase Motor Data NG Wire™ requires either a monthly or annual subscription. Every new subscription begins with a free trial that includes full access to all app features. After the trial ends, subscriptions automatically renew unless canceled through your Apple account. You can manage or cancel your subscription at any time from the Settings menu in the app. NG Wire™ includes data and calculations based on the 2026, 2023, and 2020 editions of the NEC®. Your subscription also includes future updates as new NEC® editions are released (typically every three years). Older NEC® editions will remain available as long as they are still adopted by one or more U.S. jurisdictions. Advance notice will be provided before any older edition is removed from the app. For assistance: https://ngorange.com/contact-us Privacy policy and Terms of Service: https://ngorange.com/ng-wire-privacy-and-terms ## Key features - NEC® table lookup - General conduit fill calculations - Detailed conduit fill calculations - Wire ampacity - Motor data - Ambient temperature correction - Conductor adjustment factors ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | NG Wire - Annual | $21.99 | per year | | NG Wire - Annual | $21.99 | per year | | NG Wire - Monthly | $1.99 | per month | ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/ng-wire-nec-ampacity-and-fill/id6478354523/reviews.md ### 5/5 — Easy to use *2026-04-29* User friendly and easy to navigate. ### 5/5 — Brian, P.E *2026-04-21* I find this incredibly useful to have all this information at hand on my iPhone. It is such an easy tool to design with, and it is very accurate. I wish this app had been created years ago! Kudos! ### 5/5 — Love this app. Super convenient. *2025-09-16* I absolutely love this NG app. It’s incredibly convenient and has become a tool I rely on every single day to calculate wire and conduit sizes. The accuracy and speed save me an unreal amount of time on projects. Honestly, Apple should consider making this a built-in application on every iPhone. It’s essential for engineers in the field. ### 5/5 — ⭐️⭐️⭐️⭐️⭐️ Must-Have for Electricians & Engineers *2025-08-12* NG Wire is my go-to for quick, accurate NEC® calculations. Ampacity, conduit fill, motor sizing—it’s all here and easy to use. The layout is clean, intuitive, and faster than flipping through codebooks. Updates keep it current with NEC® 2023, and it’s worth every penny for the convenience in the field and the office. ### 5/5 — A Great Tool *2024-10-17* Everything I need in the palm of my hand!! No need to search for electrical tables and calculators. Very accurate. I would recommend NG Wire to any electrician or contractor. Keep it safe!! ### 5/5 — Great App! *2024-08-27* For any contractor, electrical engineer, or person dealing with electrical systems and equipment this is a very useful tool to have in your pocket at all times! I use it more often then I anticipated! Thank you for creating this app! ### 5/5 — Using it every day! *2024-08-08* Wow! Great app. Thank you for making this. This lets me do daily circuit and feeder sizing, conduit, sizing and percent fill calcs for a bunch of different wire types, cover requirements, and motor values all in one place. No more codebook or lookup tables. Worth every penny when you consider design time. Really nice screen layouts too. Very intuitive. ## Frequently asked questions about NG Wire ### What is NG Wire? NG Wire is an iPhone and iPad app designed for electrical construction professionals. It provides access to National Electric Code® (NEC®) tables and performs calculations for wire, conduit, and motor data. ### What NEC® data years does NG Wire include? NG Wire includes data from both the 2023 and 2020 NEC®. Your subscription grants access to future versions, including upcoming NEC® updates typically released every three years. ### How does NG Wire handle subscriptions? NG Wire requires a monthly or annual subscription, which starts with a full-version free trial. Subscriptions auto-renew unless canceled and are managed through your Apple iTunes account. ### What are the subscription costs for NG Wire? The monthly subscription is $1.99 with a 7-day free trial. The annual subscription is $21.99 with a 14-day free trial. ### Does NG Wire have ads? No, NG Wire does not contain advertisements. The app is ad-free. ### What devices support NG Wire? NG Wire is available for iPhone and iPad devices. ### How often is NG Wire updated? The app was last updated on April 24, 2025, with version 2.0. Future updates will include new NEC® data years as they are released by the NEC®. ### What is the age rating for NG Wire? NG Wire has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 3 releases) ### 3.0 — 2026-07-21 - NEC® 2026 Support Added: Fully updated with the latest code standards, alongside refined calculations and table data for NEC® 2023 and 2020. - Modern Interface Redesign: Fresh, easy-to-read layout that adopts modern iOS design standards. - New Dropdown Pickers: Choose between classic wheel pickers or streamlined dropdown menus for data entry. - Enhanced Clarity: Added clear labels directly above every calculation answer so you never lose track of your results. - Expanded Percent Conduit Fill: Removed limits on wire counts—calculate conduit fill percentages for any number and different types of conductors. - Industry Standard Terminology: Updated the "Increased Size Ground Wire" tool to use standard trade phrasing: Upsized Equipment Grounding Conductor (EGC). - Improved Layouts: Streamlined the Minimum Cover calculator with dropdown entry, rearranged titles for cleaner navigation, and made minor text tweaks for a smoother user experience. ### 2.0 — 2025-04-24 NG Wire™ v2.0 updates: - NEC® changes: Added NEC® 2023 and updated NEC® 2020 table data and calculations. - Ampacity and Ambient Temp: Added ability to choose between 30°C and 40°C (base temperatures). - Conduit Fill: Added 5" and 6" conduit data for EMT and IMC. - Minimum Cover: Updated text with NEC® 2023 changes. - Ampacity and 3-Phase Motors: Bug fixed when a value is picked that allows a dependent picker to be set to a value that does not exist in the updated list. - SideView menu: Removed Rate and Privacy & Terms. Added Settings. - Settings: Users can select the NEC® data year and manage subscriptions. - Added review request popup. - Tweaked display settings to handle new devices as well as handle display changes made in this version. - Added logic to save off user preferences. This information is only stored on the current device. ### 1.0 — 2024-07-10 No release notes. ## Apps similar to NG Wire | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ugly's Electrical References](https://appshunter.io/ios/app/uglys-electrical-references/id1134770838) | 4.4 (1,475) | $12.99 | Productivity | | [Electrical Calculations](https://appshunter.io/ios/app/electrical-calculations/id993232048) | 4.6 (125) | Free | Productivity | | [Conduit Bending](https://appshunter.io/ios/app/conduit-bending/id1454893458) | 4.8 (478) | Free | Productivity | | [Prysmian Group Conductor Amps](https://appshunter.io/ios/app/prysmian-group-conductor-amps/id847898233) | 5.0 (3) | Free | Productivity | | [Wire Color Code](https://appshunter.io/ios/app/wire-color-code/id6444740127) | 4.7 (973) | Free | Productivity | | [Kojo](https://appshunter.io/ios/app/kojo/id1497640192) | 3.8 (34) | Free | Productivity | ## Related topics [prysmian group conductor amps](https://appshunter.io/ios/topics/prysmian-group-conductor-amps) · [ampacity](https://appshunter.io/ios/topics/ampacity) --- *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 2026-08-10.*