How does increased earth resistivity affect grounding systems during summer?

Increased earth resistivity during the summer months typically results in reduced moisture levels in the soil, which can lead to a higher overall resistance in the grounding system. This increased resistivity makes it more difficult for grounding systems to effectively disperse fault currents into the earth. As a result, the effectiveness of connections to the grounding system diminishes, potentially compromising safety and system reliability.

Grounding systems require low-resistance paths to ensure that fault currents can be safely directed away from electrical equipment and personnel. When the ground resistivity is high, the ability of the grounding system to function properly is negatively impacted, leading to elevated risks of equipment failure and safety hazards. Therefore, the statement that it decreases connection effectiveness accurately reflects the challenges posed by increased earth resistivity in summer conditions.