Principles, Testing Methods and Applications of Earth Ground Resistance (.pdf) »
Why ground? Why test grounding systems? What is a ground and what does it do? What is a good ground resistance value?
The components of a ground electrode, and locations of resistances. What affects the ground resistance?
Soil resistivity measurement, fall-of-potential measurement, selective measurement, and stakeless measurement.
How earth ground measurements at central offices are taken »
Learn about four particular application sites and recommended tests »