This is what today's temperature log looks like in the garden in Baja:
Nevertheless, the boys just went to buy 25 kg of road salt at the construction supply store. No, this is not due to heatstroke - the purchase is justified by an earthing probe installed in sandy soil on a project site.
According to the MSZ447:2019 standard, the grounding resistance of the grounding used for the PEN conductor must not exceed 10 Ω. In the current project, we need to establish a grounding point in a dry, sandy area without groundwater. To achieve resistance below 10 Ω, driving a 3-meter grounding rod will certainly not be enough.
To reduce the grounding resistance in such soil, we employ two methods. One is cat litter, which is typically made of volcanic ash bentonite. This clay powder contains aluminum, potassium, calcium, and sodium, and can absorb 15-20 times its volume in water.
Mixing road salt into the soil can also reduce the resistance of sandy soil by up to one-third or half. It is also undeniable that it accelerates the erosion of the probe, which will need to be monitored.