I do not think that there is anyway to connect the neutral to earth in a way that can limit the difference of potential by very much for 120 volt faults.
Take a ground rod and bang it into the earth, now connect a conductor to it from a 15 amp 120 volt source.
Will it trip the breaker?
If you where barefoot would you touch this ground rod?
As I understand it we connect the neutral to earth for two reasons. Lightning and a power company fault that sends high voltage toward your home.
How about this, we have the plumbers always use plastic water and gas lines. For a grounding electrode we drive rods or use Ufers.
Bob
