Intry Verified receipt

Is the Intry MCA & MOCP Breaker Calculator accurate and NEC compliant?

The provenance receipt for the Intry MCA & MOCP Breaker Calculator: the exact authority its values derive from, the edition they are keyed to, who has final say, and what our automated checks hold them against, rebuilt from their cited source.

The receipt

Calculated from

NEC 440.33, 440.34, 440.35 and 430.24 · NEC 440.22, 440.22(A) and 440.22(B)(1) · NEC 240.6(A) · NEC 240.4(G) (Article 440) · NEC 310.15(B)(1) and 310.15(C)(1) · NEC 310.15(B)(2) · NEC 110.14(C) · NEC 440.14, 440.12 and 110.26(A) · NEC 440.52 · NEC Table 310.16 · NEC Table 250.122 · NEC 440.4(B) and 110.3(B) · NEC Chapter 9 (voltage drop) and 210.19(A) (NEC 2023). Reused verbatim from the locked engine, never re-written for this page.

Checked

Before any release, an automated check rebuilds the calculated figures from the locked engine that produces them and holds each one against the source it cites, so a number answers to its source and not merely to itself. As of the current build that suite holds 23740 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.

Runnable

Exposed at the Intry MCP endpoint. An AI assistant can run this calculator, and before each release an automated check confirms the answer it returns is identical to the one the website's own engine produces.

Final say

The unit nameplate has final say. NEC Article 440 governs the sizing.

Frequently Asked Questions

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