Hello there. First time post. I am a CET and have studied electronics for years. My teachers could not answer these questions:
What is the nature of the service entrance neutral line vs. residence supplied earth ground? Older homes tie neutral and ground together. Newer panels have isolated neutral bus bars. If neutral is merely the center tap of a 240v service pole transformer, why is there no voltage potential between it and earth ground? More questions later.........
Thanks,
Frank
