I put down my $33 dollars for the paper. I notice the plate calculations are based on R = rho / (2*pi*C), and a the capacitance of a thin sheet. As with all these equations, the resistance is in terms of an "image" or perspective in the soil from the flat strap. The majority of the study is for...
In the IEEE Green Book 142-1991, Grounding of Industrial and Commercial Power Systems, there is a Table 13, "Formulas for the Calculation of Resistances to Ground". Actually, I have seen the siting in several reference, usually dealing with ground rods.
Dwight, H. B. "Calculations of Resistance...
