With the statement by Don, that none of us know or understand everything about grounding. I agree with him. I am researching the origin of grounding with hope of clearing up a lot of misconceptions.
I am starting with my engineering book published in 1894. Grounded circuits were circuits using the earth as a conductive path.
Dynamos were ungrounded. Single phase and three phase.
The star points of delta/wye distribution systems were electrically connected together. The purpose was to contain a winding to winding fault in transformers.
The star points were bonded but not grounded.
Now I have a starting place. I will work forward from 1894 and try to find the changes in the technical procedure and reason for grounding.
I am starting with my engineering book published in 1894. Grounded circuits were circuits using the earth as a conductive path.
Dynamos were ungrounded. Single phase and three phase.
The star points of delta/wye distribution systems were electrically connected together. The purpose was to contain a winding to winding fault in transformers.
The star points were bonded but not grounded.
Now I have a starting place. I will work forward from 1894 and try to find the changes in the technical procedure and reason for grounding.