How to reach us
WireFillChart is run by a small editorial team focused on NEC 2023 reference data, conduit fill calculators, and field-ready wire sizing tools. We read every email and reply within 2 business days.
General inquiries
For questions about the site, content, or corrections to charts and calculator output, email hello@wirefillchart.com.
Report a calculator bug or chart error
Found a wrong number, a broken layout, or output that doesn't match NEC 2023 Chapter 9? Email hello@wirefillchart.com with: the page URL, the inputs you entered, what you expected, and what you saw. Screenshots help.
Privacy and data requests
For privacy questions, data-deletion requests, or GDPR / CCPA inquiries, use privacy@wirefillchart.com. See the Privacy Policy for what we collect and what we don't.
Press, partnerships, and licensing
For media coverage, content syndication, or commercial licensing of our calculators and charts, email hello@wirefillchart.com with the subject line Partnership.
What we cannot help with
- Project-specific code interpretations — please consult a licensed electrician or your local AHJ (Authority Having Jurisdiction).
- Stamped engineering calculations — our output is reference only; see the Disclaimer.
- Hazardous-location (Class I / II / III) design — out of scope for this site.
Response time
We aim to respond within 2 business days (Mon–Fri, excluding US federal holidays). For urgent code-compliance questions affecting active jobsite work, contact your local AHJ directly.