Electrical / runnable MCP tool
Run the Wire Size Calculator 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: wire_size.
Ask your assistant
The one rule that makes it reliable: name Intry in your question. That is what tells Claude to run the wire_size 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 |
|---|---|---|
| amps | yes | Load current in amps. |
| continuous | optional | Continuous load (3h+)? Applies the 125% factor. Default false. |
| voltage | optional | System voltage (default 240). |
| phase | optional | Default single. |
| material | optional | Default cu. |
| insulation | optional | Insulation type (THHN, THWN-2, XHHW-2, TW, THW, ...). Default THHN. |
| ambientTemp | optional | Ambient temperature in °F (default 86). |
| conductorsInConduit | optional | Current-carrying conductors in the raceway (default '3'). |
| distance | optional | One-way run length in feet (informational; default 0). |
| terminationC | optional | Equipment termination temperature rating per NEC 110.14(C)(1), from the marking on the breaker, panelboard and lugs. 60 for unmarked or 60°C-marked equipment, 75 for 60/75°C or 75°C-marked. Default 75. NEC 110.14(C)(1)(a) makes 60°C the column for circuits rated 100 amperes or less UNLESS the equipment is listed and marked otherwise, so 75 is a marking-conditional value and not the code default. If the marking is unknown, 60 is the conservative choice. |
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, 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.