Wire Phase vs Fault Current Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Wire Phase
This utility app helps electricians and DIYers quickly identify and number electrical phases in single and three-phase circuits. It provides color codes for common voltage configurations and allows for easy navigation and bookmarking of circuit numbers.
- Identify 120/240 single phase
- Identify 120/208 three phase
- Identify 277/480 three phase
- Endless scrolling interface
- Jump to circuit number
- Tap to remember place
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Wire Phase helps you identify and number the different phases to their circuit number. * 120/240 single phase (Black, Red) * 120/208 three phase (Black, Red, Blue) * 277/480 three phase (Brown, Orange, Yellow) Pretty dang simple: * Endless scrolling * Type circuit number to immediately jump to the specific phase color * Tap a row to remember your place @@ Big thanks to Chris McDowell
Fault Current Calculator
This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.
- Calculate available fault current
- Size fuses and conductors
- Generate service equipment labels
- Single and three-phase system support
- NEC® 110.24 compliance
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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
Screenshots
Verdict
The clearest difference is price: Fault Current Calculator at Free against Wire Phase's $0.99. Fault Current Calculator also leads on update cadence (every 4 months vs every 57 months) and rating (3.1 vs 2.8). Wire Phase's advantage is in-app purchases (none vs 2) and review sentiment (20% vs 0%). On ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Fault Current Calculator is free to download; Wire Phase costs $0.99 up front. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month. Wire Phase asks for nothing beyond the download.
Fault Current Calculator holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 10 and 23 respectively. Written reviews complicate that: 20% of Wire Phase's written reviews are positive against 0% of Fault Current Calculator's, so the app with the better star average is not the one people write more warmly about.
Wire Phase ships an update every 57 months, Fault Current Calculator every 4 months. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.
| Parameter | Wire Phase | Fault Current Calculator |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.8 (10 ratings) | 3.1 (23 ratings) — better |
| Positive reviews | 20.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 10 | 23 — better |
| Update frequency | Every 57 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 16 MB | 25 MB |
| Age rating | 4+ | 17+ |
| Developer | TRNSFR | Cooper Bussmann, LLC |
Customer experience
Wire Phase
Fault Current Calculator
In-app purchases
Wire Phase
No in-app purchases
Fault Current Calculator
- Pro Monthly Subscription7 Days trial$4.991 Month
- Pro Annual Subscription7 Days trial$39.991 Year
Questions
Is Wire Phase free?
Is Fault Current Calculator free?
Which has better reviews, Wire Phase or Fault Current Calculator?
Do Wire Phase or Fault Current Calculator have ads?
Which is updated more often, Wire Phase or Fault Current Calculator?
Other comparisons
