Fault Current Calculator
A tool to calculate & print available fault current on electrical systems.
App info
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App description
Android App Analysis and Review: Fault Current Calculator, Developed by Cooper Bussmann, LLC. Listed in Tools Category. Current Version Is 4.2.1, Updated On 17/09/2025 . According to users reviews on Google Play: Fault Current Calculator. Achieved Over 84 thousand Installs. Fault Current Calculator Currently Has 137 Reviews, Average Rating 4.2 Stars
Eaton's Bussmann Series FC2 Available Fault Current Calculator application is an innovative tool developed for contractors, engineers, electricians, and electrical inspectors. This tool can be used on the Bussmann website or out in the field on a mobile device for those needing a quick and simple way to determine available fault current.With this simple tool, users can:
- Calculate available fault current on single and three-phase systems
- Create and send a label via email for marking the available fault current on service equipment (NEC® 110.24)
- Size fuses and conductors for service, feeder, and branch circuits.
This application, calculations, and other information are intended to clearly present technical information that will determine the available fault current at specific points in an electrical system. Bussmann reserves the right, without notice, to change this application and/or discontinue/ limit its distribution and/or availability. Bussmann also reserves the right to change or update, without notice, any technical information contained in this application. The data and information presented in this application are believed to be accurate. However, any and all liability for the content, or any omissions from this application, including any inaccuracies, errors, or misstatements in such data, calculations or information, is expressly disclaimed. The application, calculations and other information are provided without warranty of any kind, either expressed or implied, but not limited to, the implied warranties of merchantability, or fitness for a particular purpose. Bussmann disclaims any liability for the use of this application, calculations or other information. The complete End-User License Agreement can be found at: https://faultcurrentcalculatorpro.bussmann.com/home/eula
We are currently offering version 4.2.1. This is our latest, most optimized version. It is suitable for many different devices. Free download directly apk from the Google Play Store or other versions we're hosting. Moreover, you can download without registration and no login required.
We have more than 2000+ available devices for Samsung, Xiaomi, Huawei, Oppo, Vivo, Motorola, LG, Google, OnePlus, Sony, Tablet ... with so many options, it’s easy for you to choose games or software that fit your device.
It can come in handy if there are any country restrictions or any restrictions from the side of your device on the Google App Store.
What's New
We’ve made several behind-the-scenes improvements to enhance the user experience:
- Smoother navigation for a streamlined sign-up process
- Minor bug fixes to keep things running reliably
- Small design tweaks for a cleaner, more intuitive interface
Update now to enjoy a more seamless FC2 experience!
- Smoother navigation for a streamlined sign-up process
- Minor bug fixes to keep things running reliably
- Small design tweaks for a cleaner, more intuitive interface
Update now to enjoy a more seamless FC2 experience!

Recent Comments
Abraham Ayende
Another greedy application, went from free to subscription based.
Geordie Iselin
It wants you to fill in every field including aic. It's just a form not a calculator.
A Google user
Great app for a quick verification of fault at any point of the system. Thank you.
JB Gonzales
The app is great sir, how about in generators or in parrallel connection of transformer mean 2 or more supplies. Thank you
Marshall Bgis
Great app! But. Got a new phone. But the app seems not available for the new version of Android. Could you please update the app? Thanks Edit: thanks for the latest Oct. 18, 2023 update
Michael Ajayi
Good app but the unit is not SI unit. Can it be amended?
ali reza
Thank you
A Google user
Easy to use. Values aren't 100% but it's close enough.