Analysis of the Effect of Touch Voltage Reduction on the Mesh Grounding-Based Outermost Additional Conductors

In the case of ground design, the earth voltage, touch voltage and step voltage are higher on the outside than on the mesh internal, especially on the outermost, making it difficult to suppress the potential gradient increasing. In this paper, we will find out the reduction effect of potential gradient when ground conductor is add to mesh grounding system outermost, where potential gradient occurs rapidly, and utilize it for design application.