# Fault Current Calculator

> A tool to calculate & print available fault current on electrical systems.

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

## Overview

- **ID:** `com.cooperbussmann.faultcurrentcalculator`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Cooper Bussmann, LLC
- **Category:** TOOLS
- **Downloads:** 92,134
- **Rating:** 3.41 / 5 (149 ratings)
- **Version:** 4.2.1
- **Last updated:** 2025-09-17
- **First published:** 2013-05-10
- **Publisher country:** US
- **Size:** 14 MB
- **Data as of:** 2026-09-27
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.cooperbussmann.faultcurrentcalculator)
- **Website:** [https://www.eaton.com/in/en-us/products/electrical-circuit-protection/fuses-and-fuse-holders.html](https://www.eaton.com/in/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 Fault Current Calculator is a powerful Chrome extension designed for contractors, engineers, electricians, and electrical inspectors. It enables quick and precise calculations of available fault current on both single and three-phase electrical systems directly from your browser or mobile device.

Key features include the ability to size fuses and conductors for service, feeder, and branch circuits and the option to create and email labels for marking available fault current per NEC® 110.24 compliance. This user-friendly tool enhances electrical system safety and efficiency by providing reliable data for proper equipment sizing and fault current marking. Bussmann maintains a commitment to accuracy and offers this application with an extensive end-user license agreement outlining terms and conditions for use.

## Rankings

- #230,320 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `android.permission.USE_BIOMETRIC`
- `android.permission.USE_FINGERPRINT`
- `android.permission.VIBRATE`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.cooperbussmann.faultcurrentcalculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users find the Fault Current Calculator app intuitive, easy to use, and valuable for electrical fault current calculations, appreciating features like labeled PDF output. However, there are recurring issues such as lack of decimal input support on some devices, mandatory filling of all fields, and initial compatibility problems with new Android versions. The developer's updates have addressed some issues, improving the overall user experience.

### Pros

- Easy to use and intuitive interface that flows well for users.
- Provides quick and reasonably accurate fault current calculations for electrical design engineers.
- Generates detailed outputs such as PDFs with labeled fault currents.
- Effective for quick verification of faults and preferred over some traditional online calculators.
- Responsive updates addressing user feedback and compatibility with new Android versions.

### Cons

- Lack of decimal input support in impedance value fields on some devices causing user frustration.
- Restriction requiring all fields including AIC to be filled even if not applicable.
- Initial lack of compatibility with newer Android versions before updates.
- Input issues such as keypad not appearing properly on certain devices during data entry.

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