# Fault Current Finder — Short Circuit AIC / SCCR

> Electrical system modeling tool for calculating fault current and equipment ratings. (iPhone/iPad app by Octagon Seven LLC.)

- Source: https://appshunter.io/ios/app/fault-current-finder/id1200115863 (this page in markdown: same URL + `.md`)
- Developer: [Octagon Seven LLC](https://appshunter.io/developer/1200115862)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.20/5 from 5 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 23 MB
- Languages: American English
- Released: 2017-01-30
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/fault-current-finder/id1200115863/reviews.md

## What is Fault Current Finder?

Fault Current Finder is a system modeling tool for short circuit calculations. It models an electrical distribution system to determine the available fault current (short circuit current) anywhere within the system.  This useful tool helps Engineers, Electricians and Facility Managers evaluate if devices and equipment such as fuses, circuit breakers, panels, switchboards and switches are rated to meet the maximum available fault current.  NEC 2017 440.4 requires dated short circuit calculations for every new HVAC install be made available to the inspector!  IEC 60364 and DIN VDE 0100 require calculations for "Short Circuit Currents in Three Phase Systems".  Short circuit current is also needed for arc flash calculations meeting NFPA 70E standard.

Using a typical one line diagram approach, system information can be easily entered and fault current through an entire radial system can be easily evaluated.

Methodology: The internationally recognized per unit (X & R Networks) methodology is used to calculate available fault current from Utility Transformers, Generators and Inverters.  Additional resistance and reactance factors from conductors, buses and switches are calculated throughout the system.  Per unit calculations provide superior model accuracy by independently calculating resistance and reactance throughout the electrical distribution system to develop X & R at each device.   Meets ANSI C37.13 Low voltage equipment standard for 3 phase symmetrical fault current

This app can can be used to help determine NEC (NFPA 70) and OSHA short circuit current ratings (SCCR), Ampere Interrupting Capacity (AIC) & Interrupting Rating (IR) for over current protection devices (OCPD) and associated equipment such as panels, switchboards, transfer switches, riser buses, disconnect switches, fuses and circuit breakers in systems 600V or less.

To protect your facilities operational reliability, increase up time and increasing worker safety, ensure your equipment has adequate SSCR & AIC rating to meet short circuit current!  Fault current finder is the easiest fault current tool!

Short circuit reports are available (in-app purchase required)..

## Key features

- System modeling for fault current calculation
- Evaluate equipment ratings (fuses, breakers)
- Supports NEC and IEC standards
- One-line diagram approach
- Per unit methodology for accuracy
- Generate short circuit reports

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Report Generator | $19.99 | one-time |
| System Upgrade | $29.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/fault-current-finder/id1200115863/reviews.md

### 1/5 — Too bad

*2021-10-04, version 1.115*

Please fix your app. It doesn’t function at all

### 1/5 — App only crashes

*2020-08-12, version 1.115*

Can’t enter any data, keeps crashing. Tried 3 times to enter the utility transformer with no success

### 1/5 — Can’t put fault in after the until transformer

*2020-06-25*

It will not let me put my own fault current in anywhere. Just at the utility primary. Makes the app useless

### 5/5 — Better than bussman FCC

*2017-01-30*

Gives you branches instead of just 1 branch in series

## Frequently asked questions about Fault Current Finder

### What is Fault Current Finder used for?

Fault Current Finder models electrical distribution systems to determine the available fault current (short circuit current) anywhere within the system. This helps users evaluate if devices like fuses and circuit breakers are adequately rated.

### Does Fault Current Finder have ads?

No, Fault Current Finder does not contain advertisements. It is a free application with optional in-app purchases for additional features.

### What standards does Fault Current Finder support?

Fault Current Finder supports internationally recognized standards such as NEC 2017, IEC 60364, DIN VDE 0100, and NFPA 70E for short circuit and arc flash calculations.

### What devices is Fault Current Finder available on?

Fault Current Finder is available on iPhone, iPad, and iPod devices, supporting iOS operating systems.

### How accurate are the calculations in Fault Current Finder?

The app uses the internationally recognized per unit (X & R Networks) methodology, which provides superior model accuracy by independently calculating resistance and reactance throughout the electrical distribution system.

### Can I generate reports with Fault Current Finder?

Yes, short circuit reports are available for generation within the app. This feature requires an in-app purchase.

### What is the age rating for Fault Current Finder?

Fault Current Finder has an age rating of 4+, making it suitable for a wide range of users interested in electrical system analysis.

### When was Fault Current Finder last updated?

The latest version of Fault Current Finder was released on March 18, 2020. The app was initially released on January 30, 2017.

## Version history (last 5 releases)

### 1.115 — 2020-03-18

-Propagation bugfix

### 1.114 — 2019-11-22

-iOS13 upgrade bug fix

### 1.113 — 2019-11-14

-Update to address iOS 13 graphic update issue

### 1.112 — 2019-10-05

-Added genset sub transient reactance calculator

### 1.111 — 2019-05-20

- Report fix
- Consultant option added
- UX/UI updates
- Fault current model update

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## More apps by Octagon Seven LLC

- [Power Triange Calculator](https://appshunter.io/ios/app/power-triange-calculator/id1330408749)
- [Arc Flash Label Calculator](https://appshunter.io/ios/app/arc-flash-label-calculator/id1363795374)
- [Arc Flash Power Tools](https://appshunter.io/ios/app/arc-flash-power-tools/id1435677882)

All apps by Octagon Seven LLC: https://appshunter.io/developer/1200115862

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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 2026-06-01.*