Determine the conductance of a short circuit on 125 volt, which results in a short circuit current of 400 A.

Concept:

conductance

• Electrical conductance (G) of a material refers to how easily it allows the electric current to pass through it. It is the converse of electrical resistance (R) which refers to the opposition to the flow of current. 
• Thus, conductance is also defined as the reciprocal of Resistance.

          \(G=\frac{1}{R}\) or \(G = \frac{I}{V} \)

• The unit of electrical conductance is Siemens (S) or ohm-1.
• SI unit of resistance is ohm (Ω).

Calculation:

Given V = 120 V

I = 600 A

Since \(G = \frac{I}{V} = \frac{{400}}{{125}} = 3.2\;S.\)