Electrical / runnable MCP tool

Run the Voltage Drop Calculator in your AI assistant

Through the free Intry MCP server, ChatGPT, Claude, or Cursor runs this exact calculator and hands back a verdict and the cited source, not a guess. Tool name: voltage_drop.

What it runs: Compute voltage drop for a copper or aluminum branch/feeder run using the NEC K-factor method (VD = 2·K·I·L / CM, K=12.9 Cu / 21.2 Al), and the minimum wire size to stay inside 3%. Returns a verdict (within 3% / over guideline / excessive) and the governing NEC citation.

Ask your assistant

Once Intry is connected, type a question like these. The assistant recognizes the job and calls the voltage_drop tool, then answers with the number, the verdict, and the citation.

What's the voltage drop on a 120 ft run of #10 copper at 20 A, 240 V?
Is #12 too small for a 15 A load 90 feet away? What size keeps me under 3%?

Inputs

FieldRequiredWhat it is
wireSizeyesConductor size, AWG or kcmil (e.g. '12', '1/0', '250').
ampsyesLoad current in amps.
lengthyesOne-way run length in feet.
voltageoptionalSystem voltage (default 240).
phaseoptionalsingle or three phase (default single).
materialoptionalcu = copper, al = aluminum (default cu).

Add Intry to Claude (free)

One paste and Claude can run this tool and every other Intry calculator. Free on every plan, works on your phone.

  1. Open Claude and go to Settings, then Connectors (works on the phone app too).
  2. Tap Add custom connector and paste the Intry link below.
  3. Tap Add. Done. Now just ask Claude any wire, load, conduit, or refrigerant question.
Open Claude connector setup
https://www.intrysys.com/api/mcp

Free inside Claude, on every plan (including the free one) and on your phone. No login on our end, no API key.

Using ChatGPT, Cursor, or a dev tool? See the developer setup on the main page. The endpoint is https://www.intrysys.com/api/mcp.

The tool returns its governing citation with every call (for example the NEC 2023 section or the refrigerant pressure-temperature data). Numbers are computed by the same locked engine the interactive calculator uses, golden-verified in CI and gated on every deploy.

Also on Intry