SparkQuote NEC calculators

Connect it to your AI

Claude Code

claude mcp add --transport http nec-calculators https://sparkquote.ai/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://sparkquote.ai/mcp

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "nec-calculators": {
      "url": "https://sparkquote.ai/mcp"
    }
  }
}

Tools it offers

10 tools, as the server itself reported during our check on Oct 31, 2026.

• wire_sizeMinimum conductor size for a circuit: NEC Table 310.16 ampacity at the termination temperature rating, the 240.4(D) small-conductor limits, voltage drop over the run, and the Table 250.122 equipment grounding conductor,
• voltage_dropVoltage drop for a given conductor size, current and one-way length, single- or three-phase, from NEC Chapter 9 Table 8 circular mils (VD = 2·K·I·L / CM, or √3 for three-phase).
• watts_to_ampsCurrent drawn by a load in watts at a voltage and power factor, single- or three-phase, plus the 125% continuous-load value.
• conduit_fillPercent fill and maximum number of THHN/THWN-2 conductors of one size in EMT or PVC Schedule 40, from NEC Chapter 9 Tables 1, 4 and 5.
• box_fillMinimum outlet box volume from NEC 314.16(B): conductor, device (2 each), clamp and grounding allowances times the Table 314.16(B) volume for the largest conductor.
• load_calculatorDwelling service load by the NEC 220.82 optional method: 3 VA/ft² lighting, small-appliance and laundry circuits, fixed appliances, demand factor, heating or cooling, and the minimum standard service size. Leave an appli
• ohms_lawOhm's law and power: give exactly two of voltage, current, resistance and power; the other two are calculated.
• panel_scheduleLays circuits out on a 120/240 V single-phase or 208Y/120 V three-phase panel and totals the load per phase with the imbalance.
• bid_calculatorElectrical bid price from materials, markup, labor hours and rate, job costs, overhead and a target net margin (price = break-even / (1 − margin)).
• nec_ampacityAllowable ampacity of one insulated conductor from NEC Table 310.16 (not more than three current-carrying conductors in a raceway or cable, 30°C ambient), before any adjustment or correction factors and before the 240.4(

Questions