Equivalent Electrical Circuit Analogy Of Structure-to-Soil Potentials^⋆

Data obtained from structure-to-soil potential measurements, even when made with extreme care and precision, sometimes appear to be erratic and anomalous.

The “electrical equivalent circuit” analogy is very helpful in understanding and analyzing these measurements; it explains why the placement of the reference electrode is sometimes unimportant while at other times it may be very critical and why the measurement of structure-to-soil potentials cannot be considered an indication of interference unless properly evaluated in connection with all associated factors. 2.3.5