Intry Verified receipt
Is the Intry What Size Breaker Do I Need accurate and NEC compliant?
The provenance receipt for the Intry What Size Breaker Do I Need: 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 240.6(A) and 210.20(A) · NEC Table 310.16, 240.4(B) and 240.4(D) · NEC Table 250.122 · NEC 424.4(B), 424.22(B), 110.14(C)(1) and 110.3(B) (fixed electric heat) · NEC 210.19(C) and Table 220.55 · NEC 422.13, 625.41 and 625.42 · NEC Article 440 and Article 430 (NEC 2023). Reused verbatim from the locked engine, never re-written for this page. The documents it rests on are listed in the source receipt on the tool page.
- Edition
- NEC 2023
- Checked
- Before any release, an automated check runs the locked engine that produces these figures and holds its answers against values written from the source it cites, so a checked number answers to its source and not merely to itself. The check covers the cases someone wrote a check for, not every input the tool accepts: it tells you where a number comes from, and it is not a proof of every value. As of the current build that suite holds 31163 checks, and this page has to clear them too. This is our own deterministic gate, not a third-party audit.
- Runnable
- A reference engine behind the published numbers on this site. Runnable access is offered on the calculators exposed at the Intry MCP endpoint.
- Final say
- The equipment nameplate has the final say for nameplate-rated loads (HVAC, motors, welders, spas); your AHJ and local amendments govern the install.
Frequently Asked Questions
Is the Intry What Size Breaker Do I Need accurate and NEC compliant?
It computes from the NEC sections named below (NEC 2023), and our automated checks hold its answers against values written from those sources for the cases the checks cover, not for every input you can enter. Whether an installation is NEC compliant is decided by the inspector, not by a calculator. The equipment nameplate has the final say for nameplate-rated loads (HVAC, motors, welders, spas); your AHJ and local amendments govern the install. Every figure an Intry calculator computes comes from a locked source module, not hand-typed. 31163 automated checks, one suite for the whole site rather than a per-tool count, re-derive the numbers before each deploy from the tables this site transcribed from the cited NEC section. This is our own deterministic gate, not a third-party audit. The per-tool receipt is public at https://www.intrysys.com/verified.