Intry Verified receipt
Is the Intry Three-Phase Motor Calculator accurate and NEC compliant?
The provenance receipt for the Intry Three-Phase Motor Calculator: the exact authority its values derive from, the edition they are keyed to, who has final say, and what the deploy gate actually checks them against, re-derived from their cited source.
Short answer: Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 15079 automated checks re-derive and source-check the numbers against the cited NEC Table 430.250 and 430.248 full-load currents and the Article 430 branch-circuit rules before each deploy. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.
The receipt
- Calculated from
- the cited NEC Table 430.250 and 430.248 full-load currents and the Article 430 branch-circuit rules (NEC 2023). Reused verbatim from the locked engine, never re-written for this page.
- Checked
- Before any deploy, a deterministic test suite re-derives calculated figures from their locked source module and source-checks the numbers against what they cite, so a number is held to its real source, not just to itself. As of the current build that suite holds 15079 checks, and it gates this page too. This is our own deterministic gate, not a third-party audit.
- Runnable
- A reference engine that powers the published numbers. It is not exposed as a runnable MCP tool.
- Final say
- Your AHJ has final say. The table current sizes the branch circuit; your motor's nameplate sizes the running overload device (430.32), which this tool does not size. Wound-rotor and DC motors take a different percentage from Table 430.52 and are out of scope.
Frequently Asked Questions
Is the Intry Three-Phase Motor Calculator accurate and NEC compliant?
Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 15079 automated checks re-derive and source-check the numbers against the cited NEC Table 430.250 and 430.248 full-load currents and the Article 430 branch-circuit rules before each deploy. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.