What additional action can be taken if resistance is too high when using a grounding rod?

When dealing with grounding rods, one key principle is that the resistance of the grounding system needs to be kept as low as possible for it to function effectively. If resistance is too high, extending the length of the grounding rod is a viable solution because it increases the contact area with the surrounding soil. This additional length allows for better conductivity as it penetrates deeper into the earth where soil conductivity may be more favorable.

Longer rods can also reach various soil types that may have lower resistivity and can provide a better path for electrical faults to dissipate into the ground. In general, a longer grounding rod enhances the effectiveness of the grounding system, helping to ensure safety and compliance with electrical standards.

Other actions, such as leaving the rod as is, shortening it, or using a wider rod, do not necessarily address the issue of high resistance effectively. Simply leaving the rod does not solve the problem. Shortening the rod would likely increase resistance, and while a wider rod may improve surface area contact, it is the depth and reach into more conductive soil that primarily reduces resistance. Therefore, extending the length of the rod is the most effective strategy in this scenario.