In order to maintain good electrical continuity when joining copper bonded earthing rods in series, there are a few best practices it's worth observing. First, always utilize top-end couplers that are manufactured to perform this function—these are typically brass or copper alloy to keep them from corroding and to retain a good, low-resistance contact. When connecting the rods, ensure... https://www.pioneerpowers.com/copper-bonded-earth-rod.php