Electrical / runnable MCP tool
Run the Outdoor HVAC GFCI Requirement (NEC 210.8(F)) in your AI assistant
Through the free Intry MCP server, Claude, ChatGPT, or Cursor runs this exact calculator and hands back a verdict and the cited source, not a guess. Tool name: outdoor_hvac_gfci.
Ask your assistant
The one rule that makes it reliable: name Intry in your question. That is what tells Claude to run the outdoor_hvac_gfci tool and answer with the real number, the verdict, and the citation. Leave Intry out and Claude may just guess from memory, which is exactly what you are trying to avoid. Type something like:
Inputs
| Field | Required | What it is |
|---|---|---|
| state | yes | US state or District of Columbia, spelled out (e.g. 'Georgia'). |
| occupancy | yes | 210.8(F) covers dwellings only. 'other' returns a refusal pointing at 210.8(B). |
| equipment | yes | What the outlet supplies. 'listed-hvac' is the condenser/heat-pump case the 2026 sunset is about. 'snow-melting-deicing' is written out of 210.8(F) by its own stem and handed to 426.28/427.22, so it returns a refusal. |
| connection | yes | REQUIRED, and it changes which rule governs. 210.8(F) is about outdoor OUTLETS, hardwired included. 210.8(A) is about RECEPTACLES, so a cord-and-plug unit is ALSO reached by 210.8(A)(3) 'Outdoors', which has no HVAC exception and no ampere ceiling. This tool refuses on cord-and-plug rather than answer from a section that cannot speak for the other one. Ask the user if you do not know; do not assume. |
| phase | yes | REQUIRED. Every edition of 210.8(F) we have read is scoped to 'single-phase branch circuits', so a three-phase circuit returns a refusal rather than an answer. |
| workType | optional | New installation, or replacing existing equipment (which triggers its own paragraph from the 2023 edition onward). |
| branchCircuitAmps | optional | Branch-circuit rating in amperes. 210.8(F) reaches 50 A or less on the editions we have read. |
| voltsToGround | optional | Volts to ground. 210.8(F) reaches 150 V or less to ground. |
| location | optional | Outlet location. |
| energizationDate | optional | ISO date (YYYY-MM-DD) the circuit is energised or inspected. The answer changes at the 2026-09-01 sunset where a state has not amended it. |
Add Intry to Claude
One paste and Claude can run this tool and every other Intry calculator, right from your phone.
- Claude opens with the Intry connector already filled in. Review it and click Add.
- (If a field is blank, paste the link below into the URL field.)
- In any chat, tap + then Connectors and switch Intry on. Then name Intry in your question (“use Intry to…”) so Claude runs the tool instead of guessing.
https://www.intrysys.com/api/mcpNo login, no API key, and it works on every Claude plan, right from your phone.
Using ChatGPT, Cursor, or a dev tool? See the developer setup on the main page. The endpoint is https://www.intrysys.com/api/mcp.
Every answer comes with the cited NEC section together with your state's own amendment to it, so you can check it or show an inspector. The numbers come from the same calculator we run on intrysys.com, and we re-check every one automatically before anything goes live, so the number Claude hands you matches the code.