Underground Cable – Introduction and Construction

An underground cable essentially consists of one or more conductors covered with suitable insulation and surrounded by some protective layer. Normally, electric power can either be transmitted using over head lines or underground cables. But the use underground cable offers a variety of advantages. Some of the advantages are listed below. It is less liable … Read more Underground Cable – Introduction and Construction

Calculation of Cable Capacitance

Cable capacitance is the formation of capacitance between the charged core or conductor and the earthed lead sheath. Therefore it is quite important to have an idea of how the cable capacitance varies or the factors affecting its value. Calculation of Cable Capacitance A single core cable is similar to two long co-axial cylinders having … Read more Calculation of Cable Capacitance

Why Insulation Resistance is Inversely Proportional to Length?

It seems amazing that Insulation Resistance (IR) of a Cable is inversely proportional to the length of Cable. As per our general perception, the resistance is directly proportional to length of conductor but mind here that it is not the resistance of conductor rather it is the resistance of the Insulation provided around the conductor. … Read more Why Insulation Resistance is Inversely Proportional to Length?