When taking a pipe to soil reading over a structure, what is typically located over the pipe?

When taking a pipe to soil reading over a structure, a reference electrode is typically located over the pipe. The reference electrode is essential for measuring the potential of the pipe in relation to the soil. This electrode provides a stable reference point, allowing for accurate determination of corrosion potential and effectiveness of cathodic protection systems.

In cathodic protection applications, obtaining precise measurements is critical to assess the protection level of the pipeline. The reference electrode helps to ensure that readings are not influenced by soil variables or other factors that could distort the data. While ground rods, current sources, and insulation barriers are important components in cathodic protection systems, they do not serve the same function when it comes to taking an accurate pipe to soil potential reading.