A good ground resistance value depends on the use. Here are some general guidelines:
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* For homes and commercial buildings a resistance value of 5 ohms or less is often recommended for grounding systems.
* For systems, such as substations, communication towers and sensitive electronics the goal is usually 1 ohm or less. This is to ensure a grounding system for these critical systems.
Lower resistance values provide protection, against electrical faults and surges. This makes the system safer and more stable. The required value can vary depending on soil composition, moisture levels and safety standards in an area or industry. A good ground resistance value is key. Grounding systems need to be designed with this in mind. A lower ground resistance value is usually better.
