This is the current code if you are really interested in thi

https://eepower.com/technical-articles/national-electrical-code-2023-basics-grounding-and-bonding-part-12/#

The requirement of a second ground rod is a recent thing. Previously it was ok just to tie the ground to a water pipe. 

所有跟帖： 

• 谢谢波大。这个还真的看不懂。太专业了。 -老九不能走- ♂ (0 bytes) () 02/13/2025 postreply 14:23:55