Answer to Question #304209 in Electrical Engineering for Jelai

Question

The substation bus bar is made up of made 1.5 inches round copper bars 30 ft long. What is the resistance of each bar?

Answer 1

Radius of copper bar= 0.0381/2 = 0.019 meter

Area of copper bar = 3.4 (0.019)²= 0.059 m²

L= 9.144 m

The density of copper in SI =  8830 Kg /m³

Resistance of copper bar = Density of copper *(L/A)

Resistance of copper bar =8830 *(9.144/0.059)= 56.96 ohm