Wire resistance R = rho L / A for copper or aluminium at a temperature, or corre...
https://electrical-calc.x402tookit.com/wire-resistanceOverview
Wire resistance R = rho L / A for copper or aluminium at a temperature, or correct a known resistance to a new temperature.
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x402
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$0.02
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eip155:8453
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uncategorized
Provider
Electrical Calculators
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bazaar
Indexed
2026-11-01 23:11:57
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unknown
Latency (p50)
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Uptime (30d)
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Input Schema
{
"method": "GET",
"queryParams": {
"lengthM": 100,
"material": "copper",
"sizeMm2": 2.5,
"temperatureC": 75
},
"type": "http"
}
Output Schema
{
"example": {
"alphaPerC": 0.00393,
"areaMm2": 2.5,
"asOf": "2026-10-21T06:22:29.744Z",
"conductor": "2.5 mm2",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"lengthM": 100,
"material": "copper",
"notChecked": [
"ampacity or insulation temperature rating (no NEC or IEC tables are included: consult the code)",
"skin and proximity effect at high frequency or large conductors",
"…2 more"
],
"reasons": [
"Typical values at 20 C: copper resistivity 1.724e-8 ohm m, temperature coefficient 0.00393 per C.",
"R = rho x L / A with rho(T) = rho20 x (1 + alpha (T - 20))."
],
"resistanceAt20COhm": 0.6896,
"resistanceAtTemperatureOhm": 0.838657,
"resistanceOhmPerKmAtTemperature": 8.38657,
"resistivity20COhmM": 1.724e-8,
"resistivityAtTemperatureOhmM": 2.096643e-8,
"source": "computed locally (R = rho L / A; R2 = R1 (1 + alpha (T2 - T1)), copper alpha 0.00393 per C at 20 C)",
"summary": "2.5 mm2 copper, 100 m: 0.838657 ohm at 75 C (0.6896 ohm at 20 C).",
"temperatureC": 75,
"verdict": "COMPUTED"
},
"type": "json"
}