Copyright and terms of use
Who owns the tool, what you may do with its results, and the limits of what it can tell you.
Copyright
© 2026 The Regents of the University of Colorado. All rights reserved.
The software, interface design, text and intro video on this site are protected by copyright. You may use the tool and include its results in your own project documents. Copying or redistributing the software or site content needs written permission.
Trademarks
NEC and National Electrical Code are registered trademarks of the National Fire Protection Association. Panel Sizer is not affiliated with or endorsed by the NFPA.
No warranty
The tool is provided as is, for education and preliminary sizing. Its results are not a permit document and do not replace a licensed electrician or engineer, the edition of the code adopted where you build, or the decision of the local inspector. The University of Colorado accepts no liability for work carried out from the results.
Permissions
To ask about reuse or licensing, write to the lab through the contact page.