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I thought I had the step and touch potential figured out but as it seems, I can only calculate the tolerance values for touch and step potentials. From my research, concrete cured for 200 hours can give upto 250 ohm-m. From my formulas, i get the following tolerance values Estep=410V and...

Thanks goodchoi, Gives me a starting point to work on. In your experience, what is a good Sf value to consider for moist soil (0.8)?

I do not have access to IEEE Std. 80 yet. Is there any way to do the calculations though without soil resistivity. The concrete has been poured so we cannot get any more soil readings. I was reading through the code that mentions we cannot have more than 5000V in ground potential rise. And i...

I am trying to calculate ground potential rise to make sure it is not over 5000V. The substation is in the basement of a high rise with concrete pad. Incoming is 12.5kV and stepped down to 600V. As per the coordination study, it has 13.4kA of fault current available. There are 6 groundings...