What is the approximate total resistance of two 500 kcmil uncoated copper conductors wired in parallel for 1,000 feet?

To determine the total resistance of two 500 kcmil uncoated copper conductors wired in parallel over a distance of 1,000 feet, we start by calculating the resistance of one 500 kcmil conductor.

Uncoated copper has a resistivity of approximately 10.37 ohms per circular mil-foot. The area of a 500 kcmil conductor can be calculated using its size:

• 500 kcmil is equal to 500,000 circular mils.

The resistance of a single 500 kcmil conductor for 1,000 feet is calculated by the formula:

[

R = \frac{\text{Resistivity} \times \text{Length}}{\text{Area}}

]

Plugging in the values:

[

R = \frac{10.37 , \text{ohm-cm/foot} \times 1,000 , \text{feet}}{500,000 , \text{circular mils}}

]

Calculating that gives you approximately 0.02074 ohms for one conductor.

When you have two identical conductors in parallel, you can use the formula for total resistance in parallel:

[