Wire gauge ampacity lookup API

Look up copper conductor ampacity per NEC 310.16 by AWG gauge and insulation temperature rating (60/75/90 °C), returning area in kcmil and all three ratings. Answers 'ampacity of 12 AWG copper','how many amps can 2/0 carry','wire current rating at 75°C'.

Price$0.01per request

MethodPOST

Route/v1/calc/eng-wire-ampacity

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcengineeringelectricalwireampacityawgnecconductor

API URLhttps://x402.hexl.dev/v1/calc/eng-wire-ampacity

Integration docs

Example request

{
  "awg": "12",
  "tempRatingC": 75
}

Example response

{
  "awg": "12",
  "found": true,
  "tempRatingC": 75,
  "ampacityA": 25,
  "areaKcmil": 6.53,
  "conductor": "copper",
  "reference": "NEC 310.16",
  "allRatings": {
    "60C": 20,
    "75C": 25,
    "90C": 30
  }
}

Input schema

{
  "type": "object",
  "required": [
    "awg"
  ],
  "properties": {
    "awg": {
      "type": "string",
      "description": "AWG gauge (e.g. '12', '2/0')",
      "examples": [
        "12",
        "2/0"
      ]
    },
    "tempRatingC": {
      "type": "number",
      "enum": [
        60,
        75,
        90
      ],
      "default": 75
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}