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The Aluminum Electrical Conductor Handbook lists a dc resistance of 0.01558 ohm per 1000 ft at 20°C and a 60-Hz resistance of 0.0956 ohm per mile at 50°C for the allaluminum Marigold conductor, which has 61 strands and whose size is 1113 kcmil.

Assuming an increase in resistance of 2% for spiraling, calculate and verify the dc resistance.

Then calculate the dc resistance at 50°C, and determine the percentage increase due to skin effect.

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