A rod or pipe electrode is generally required to be driven to a depth of not less than what measurement?

The requirement for a rod or pipe electrode to be driven to a depth of not less than 8 feet is based on engineering and safety standards established in the National Electrical Code (NEC). This depth ensures that the electrode is adequately grounded to provide a low-resistance path to earth, which is crucial for safety in electrical systems. By penetrating to this depth, the electrode is more likely to reach moist soil that can facilitate a better electrical connection, thereby reducing the risk of electrical shock and improving the performance of the grounding system. The 8-foot depth is a standard that balances practicality with effective grounding performance.