Last updated September 3, 2026

Terms of Use

These terms cover the Conduit Fill: NEC Calculator iOS app andhttps://conduitcalc.txyou.com. App Store purchases also follow Apple’s media services terms.

License

The app is free to download for personal field use. Fill forward on EMT and THHN, one What pipe? lookup, and one V-Drop calculation are included at no charge. An optional non-consumable in-app purchase (“Unlock”, $7.99 USD or local equivalent) licenses voltage drop, wire size, 2023 and 2026 tables, more saved jobs, and a clean inspector PDF on devices signed in with that Apple ID. There is no subscription and no auto-renewal.

Purchases and restore

Apple charges the unlock to the Apple ID. Restore Purchases is the way to recover the unlock after a reinstall. Refunds are handled by Apple, not by us.

Not the codebook

The app sizes pipe, voltage drop, and wire from numeric tables. It is not NFPA 70, not the codebook, and not AHJ approval. Verify every pull against the edition your inspector is using. Dimensions and ampacity values are transcribed for calculation. This app is not affiliated with, endorsed by, or a substitute for NFPA 70®.

Acceptable use

Do not copy the app, strip its tables for another product, or present results as inspector approval. Do not attempt to add tracking or advertising to redistributed copies.

Disclaimer

The app is provided as-is for field calculation. We are not liable for pulls, inspections, or device settings. You are responsible for checking the job against the adopted code and the authority having jurisdiction.

Contact

Questions: support@conduitcalc.txyou.com.