Intry Verified receipt

Is the Intry Transformer OCPD Calculator accurate and NEC compliant?

The provenance receipt for the Intry Transformer OCPD Calculator: the exact authority its numbers derive from, the edition they are keyed to, who has final say, and how a deploy gate re-checks its numbers against their cited source.

The receipt

Calculated from

the cited cell of NEC Table 450.3(B) and the standard ratings in 240.6(A) (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 9547 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. Table 450.3(B) gives maximums, so a smaller device is usually permitted and often required by the load, the conductors or the transformer inrush.

Frequently Asked Questions

Use it