Fault Current Calculator vs Grounded

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

Grounded is the field toolkit for electricians — built by a working electrician, not a software company. CALCULATORS • Voltage drop, wire & breaker sizing, conduit fill, box fill • Article 220 load calculations • Motor circuits, transformers, grounding & bonding • Ohm's law & three-phase power AI ASSISTANT • Ask code questions in plain English • Answers cite the relevant NEC articles • Built for the field — always verify with your local code PIPE BENDING • Live diagrams that draw your exact bend • Stub-ups, offsets, saddles, rolling offsets, and multi-bend SOLAR / PV • String sizing with cold-temperature voltage checks • Conductor, OCPD, and interconnection sizing • Solar production & payback estimating ON THE JOB • Reference tables: ampacity, conduit fill, torque specs • Wire color codes by voltage system • Notes — jot measurements offline, synced to your account • Panel schedules, job estimating, and hours tracking • Works offline in basements and new construction STUDY • NEC flashcards with spaced repetition • Exam prep built for the 2026 code cycle Built on the 2026 NEC, with 2023 supported. Core tools are free; Grounded Pro unlocks the full toolkit. GROUNDED PRO • Monthly — $8.99 • Annual — $79.99 (save 26%) Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in Settings → your name → Subscriptions. Terms of Service: https://www.groundedpro.io/terms Privacy Policy: https://www.groundedpro.io/privacy Grounded is a calculation aid — always verify with the NEC and your local AHJ. Not affiliated with NFPA.