pete_c
Guru
A Ufer ground, obtained by connecting the grounding conductor to the rebar in your foundation, should provide a good earth ground.
In Florida the elevated ranch sits at sea level and mostly on sand. Grounding does go to the rebar there.
In the Midwest it is to the water ingress and another stake in ground. Soil is totally different.
Measuring earth resistivity.
The effectiveness of grounding rods largely depends on whether the soil surrounding the rods can conduct large electrical currents. To design a buried grounding system correctly, you must measure earth resistivity with a ground resistance testing instrument. This instrument should also have switches to change the resistance range. You can use various test methods to measure earth resistivity, but the three most common are:
In Florida the elevated ranch sits at sea level and mostly on sand. Grounding does go to the rebar there.
In the Midwest it is to the water ingress and another stake in ground. Soil is totally different.
Measuring earth resistivity.
The effectiveness of grounding rods largely depends on whether the soil surrounding the rods can conduct large electrical currents. To design a buried grounding system correctly, you must measure earth resistivity with a ground resistance testing instrument. This instrument should also have switches to change the resistance range. You can use various test methods to measure earth resistivity, but the three most common are:
Four-point method, the most accurate.
Variation in-depth method (three-point method).
Two-point method.