# Fault Current Calculator

> Utilities

Canonical page: [https://chrome-stats.com/d/id647477910](https://chrome-stats.com/d/id647477910)

## Overview

- **ID:** `id647477910`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Cooper Bussmann, LLC
- **Category:** Utilities
- **Rating:** 3.00 / 5 (27 ratings)
- **Version:** 4.2.1
- **Last updated:** 2025-09-17
- **First published:** 2013-05-21
- **Size:** 25 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/fault-current-calculator/id647477910)
- **Website:** [https://www.eaton.com/us/en-us/products/electrical-circuit-protection/fuses-and-fuse-holders.html](https://www.eaton.com/us/en-us/products/electrical-circuit-protection/fuses-and-fuse-holders.html)
- **Privacy policy:** [https://faultcurrentcalculatorpro.bussmann.com/home/privacypolicy](https://faultcurrentcalculatorpro.bussmann.com/home/privacypolicy)

## Description

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

## Rankings

- #261,986 — Overall

## Review summary

Users rate the app as free and time-saving, with past reliability. However, multiple reviews report serious iOS 12 compatibility problems and update/launch failures, plus a forced or automatic upgrade to Pro that removes access to the standard version. These reliability and upgrade issues dominate the feedback, making the app feel unstable on current devices despite its prior usefulness.

### Pros

- Free to use
- Saves a lot of time
- Was reliable and worked well for years (pre-iOS 12)

### Cons

- iOS 12 compatibility issues across multiple reviews (app won’t run, black screens, display/keyboard problems, and features like emailing labels failing)
- Forced upgrade to Pro / paid version or auto-upgrade that locks out the standard version
- App frequently gets stuck during update or launch (spinning wheel or black screen)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id647477910)