Question 10.8: Find the resistance of a piece of 6 AWG copper wire 550 ft l......

Delmar’s Standard Textbook of Electricity [1086273]

Find the resistance of a piece of 6 AWG copper wire 550 ft long. Assume a temperature of 20° C. The formula to be used is:

\mathrm{R}=\frac{\mathrm{K} \times \mathrm{L}}{\mathrm{CM}}

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The value for K can be found in the table in Figure 10 –10. The table indicates a value of 10.4 Ω-CM per foot for a copper conductor. The length, L, was given as 550 ft, and the circular mil area of 6 AWG wire is listed as 26,250 in the table shown in Figure 10 –11.

$R=\frac{10.4 ~\Omega-\mathrm{CM} / \mathrm{ft} \times 550~ \mathrm{ft}}{26,150 ~\mathrm{CM}}$

$\mathrm{R}=\frac{5720 ~\Omega-\mathrm{CM}}{26,250 ~\mathrm{CM}}$

$R=0.218 ~\Omega$

10.11

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