curl --request POST \
  --url https://api.iotools.cloud/v1/tool/voltage-drop-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "loadCurrent": "15",
  "supplyVoltage": "120",
  "cableLength": "50",
  "lengthUnit": "ft",
  "wireGauge": "12",
  "conductor": "copper",
  "voltageSystem": "ac1",
  "maxVdPercent": "3"
}
'

{
  "tool": "voltage-drop-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "status": "12 AWG copper carrying 15 A over 50 ft (AC 1-phase) drops 2.9 V (2.41%) — within your 3% limit.",
    "result": [
      {
        "property": "Voltage Drop",
        "value": "2.895 V"
      },
      {
        "property": "Voltage Drop (%)",
        "value": "2.41 %"
      },
      {
        "property": "Voltage at Load",
        "value": "117.11 V"
      },
      {
        "property": "Power Loss (heat)",
        "value": "43.42 W"
      },
      {
        "property": "Status",
        "value": "Within 3% limit"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}