What is the resistance of 25,000 feet of #40 copper wire at room temperature?

Question

What is the resistance of 25,000 feet of #40 copper wire at room temperature?

Answer 1

(Wire resistance) = (length of wire in ft / 1000) * (ohm/1000 ft)

For AWG 40 wire:

ohm/1000 ft = 1049

conductor diameter = 0.0031 inch

Resistance = (25000/1000 ft) * (1049 ohm/1000 ft)

= 26225 ohm at 25 C.

Answer 2

#40 has a resistance, from the tables, of 1049 ohms/1000 ft

So 25000 ft has a resistance of 26.2 kohm

http://www.powerstream.com/Wire_Size.htm

Answer 3

#40 copper wire has a resistance of 1070 ohms per 1000 feet.

1070 Ω x 25 = 26,750 Ω