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Wire Resistance and Loss Calculator

Loop resistance from the AWG dataset, I2R loss, drop, efficiency and annual waste cost. 6 inputs, 5 outputs with grouped results.

Inputs

Run

One-way; loop doubled inside.

Operating current.

Conductor

Pick the gauge off the reel; properties come from the NEC Chapter 9 Table 8 dataset.

Conductor material

Copper K = 12.9, aluminum K = 21.2 equivalent via dataset resistance.

Energy price

Energized hours for waste cost.

Blended energy rate.

Result

Power loss
101.1 W
Loop resistance
0.3951 Ω
Voltage drop
6.32 V
Waste cost / yr
$49
Wasted energy / yr
405 kWh
Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

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Workspace

Keep the assumptions with the result.

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