Is high earth to neutral voltage in single phase power supply system indication of high earth resistance?
first check the earthing system in use..  if you have  TN-S , TN-C or TN-C-S then you have a bad earth  connection.  On the other hand if you have an IT mains which happens when you have 2 phases in stead of phase and neutral... in the last case its normaal to measure high Earth - Neutral( or maybe other phase ..  hope this helps