# AmpLookUp — Underground Ampacity

> Underground ampacity calculations based on National Electrical Code (NEC) data. (iPhone/iPad app by Nebulous LLC.)

- Source: https://appshunter.io/ios/app/amplookup/id1461682153 (this page in markdown: same URL + `.md`)
- Developer: [Nebulous LLC](https://appshunter.io/developer/1448637140)
- Category: Utilities, Reference
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 10.0 · 15 MB
- Languages: English
- Released: 2019-12-28
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/amplookup/id1461682153/reviews.md

## What is AmpLookUp?

As with voltage drop, underground duct bank calculations are not a code requirement. Although local authorities may require these calculations. 

Neher-McGrath calculations are important, especially if the design sizing will ever be fully loaded. A prime example would be a data center application. 

There are many expensive software tools available and may be required to fit your exact installation. The National Electrical Code (NEC) provides some guidance on the subject; although, applying all of the considerations can be tedious. 

This application looks-up the data within the NEC. If you have ever looked through Annex B, you know the fun double chart you have to remember how to use. This app also pulls through some of the written text to achieve two cell duct banks, for instance. 

We welcome feedback.

## Key features

- Underground ampacity calculations
- NEC Annex B data lookup
- Guidance for two-cell duct banks
- Simplifies complex electrical design
- References National Electrical Code


## Frequently asked questions about AmpLookUp

### What is AmpLookUp used for?

AmpLookUp is used for performing underground ampacity calculations based on data from the National Electrical Code (NEC). It helps users quickly find necessary information for electrical design, particularly for complex installations.

### Is AmpLookUp free to use?

Yes, AmpLookUp is available for free. There are no in-app purchases or subscription fees associated with using the application.

### Does AmpLookUp have ads?

No, AmpLookUp does not contain advertisements. Users can utilize the app without any interruptions from ads.

### What devices does AmpLookUp support?

AmpLookUp is compatible with Apple devices, including iPhone, iPad, and iPod. It is designed for iOS operating systems.

### How often is AmpLookUp updated?

AmpLookUp was last updated on December 28, 2019, with version 1.0. As of now, there have been no subsequent updates listed.

### What is the age rating for AmpLookUp?

AmpLookUp has an age rating of 4+. This indicates it is suitable for a wide range of users, including children, with no mature content.

### Where does AmpLookUp get its data from?

AmpLookUp pulls its data directly from the National Electrical Code (NEC), specifically referencing information found in Annex B and relevant written text.

### Can AmpLookUp handle complex duct bank configurations?

Yes, AmpLookUp provides guidance for specific configurations, such as two-cell duct banks, and helps in applying NEC considerations that can be tedious to calculate manually.

## Version history (last 1 release)

### 1.0 — 2019-12-28

No release notes.

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## More apps by Nebulous LLC

- [VDrop](https://appshunter.io/ios/app/vdrop/id1461666751)
- [BubbleScore](https://appshunter.io/ios/app/bubblescore/id6740188406)

All apps by Nebulous LLC: https://appshunter.io/developer/1448637140

## Related topics

[nebulous llc](https://appshunter.io/ios/topics/nebulous-llc) · [neba connect](https://appshunter.io/ios/topics/neba-connect)

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*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 2026-06-05.*