What is the target ohms for electrical grounding in the United States?

The target for electrical grounding resistance in the United States is set at less than 25 ohms. This standard is established to ensure adequate grounding, which is essential for safety and operational efficiency. Proper grounding helps to prevent electric shock hazards by providing a low-resistance path for electric current to flow in the event of a fault or surge.

Achieving a grounding resistance of less than 25 ohms minimizes the risk of voltage buildup and improves the effectiveness of circuit protection devices. In some scenarios, lower resistance values, like less than 10 ohms, may be required for specific installations, especially in areas with high soil resistivity or critical operational needs. However, the general requirement for most facilities and applications is to maintain grounding resistance below the 25-ohm threshold to ensure safety and compliance with electrical standards.