If you read back in this thread (using the NANOG mailing list archive), you’ll find this has been explained in great detail. In a nutshell, phase grounding won’t help if a generator is energized from the customer end, and this technique was discontinued in the 1970s due to the many deaths that resulted.



On Mon, Aug 30, 2021 at 7:35 AM Lady Benjamin Cannon of Glencoe, ASCE <lb@6by7.net> wrote:

Yes, this is a real and dangerous problem.  Today.  Even with grounding I’m afraid.  Source: I’ve been working in an engineering capacity for 27 years and I have the license you’d need to build a nuclear power plant. 

Would you care to educate me on this?

If you ground the phases on both sides of the work-site, how are you going to end up being a better path to ground?

-A