Report a calculation issue
Use Save / Share → Download record to include the entered configuration and calculation. Add the result you expected, the NEC edition and section you checked, and your browser or phone model. Leave out customer names and site addresses.
For an urgent installation decision, consult a qualified electrician, engineer, or your local authority. A support reply is not a substitute for that review.
Product feedback and privacy
The same inbox handles feature requests, accessibility issues, and privacy questions. A short description of the task you were trying to complete is more useful than a long wish list. We do not publish a response-time guarantee.