Ground resistance should be designed such that_____________?
Correct answer: A. grounding resistance should be as low as possible
- A. grounding resistance should be as low as possible
- B. grounding resistance should be as high as possible
- C. grounding resistance should be always zero
- D. none of the above
Explanation
Low grounding resistance keeps fault current high enough to operate protective devices and limits the voltage rise of exposed metalwork. A resistance of exactly zero is impractical, so it should be made as low as reasonably possible.
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