Grounding Grid Mathematical Model
Grounding Grid Design
Soil resistivity data was gathered at and around the construction site of the proposed train station at different depths. I made a note in the train station construction documents so that when construction began the soil resistivity would be tested again to either confirm or contradict the results of the statistical study I created in excel below:
With the results of the soil resistivity statistical study I used excel solver and a grounding grid model based on IEEE series 100 to minimize the amount of copper used in the grounding grid while at the same time maintaining the E-Touch and E-Step values below a threshold to reduce the risk of injury during a fault.