Quick Answer
When selecting the right location for grounding in solar arrays, ensure the site is well-drained, away from standing water, and has minimal shading. A spot with good soil conductivity and minimal interference from nearby AC power sources is ideal. Consider the array's size and orientation when choosing the grounding location.
Grounding Site Selection Criteria
When selecting a site for grounding, the most critical factor is a reliable connection to the earth. This requires a location with good soil conductivity, which is typically found in areas with high clay content or a mix of clay and sand. Avoid areas with standing water, as this can cause electrolysis and damage the grounding system.
Site Requirements and Considerations
The grounding site should be located at least 10 feet away from the array and any AC power sources to prevent electrical interference. A location with minimal shading is also essential to ensure accurate current flow. When choosing the site, consider the array’s size and orientation to ensure the grounding system can handle the anticipated fault current. In general, a grounding site with a surface area of at least 4 square feet and a depth of 12 inches is recommended.
Grounding System Design and Installation
The grounding system should consist of a 10-gauge or larger grounding electrode, buried at a depth of 12 inches and spaced at least 12 inches apart. The grounding electrode should be connected to a grounding rod or plate, which in turn is connected to a grounding busbar. The grounding busbar should be connected to the array’s grounding system and the electrical panel. Ensure all connections are secure and use a grounding system designed for the array’s size and voltage to prevent electrical shock and equipment damage.
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