I'm currently working overseas, and this particular area is what they call Force Provider systems. There are transformers(They are called SDC's) that provide 4160 on the primary side, and 120/208 on the secondary. On the outside of these transformers are connectors for the force provider cables to hook up to. They are about 8 60 amp 3 phase connections and 2 100 amp. The unit allows for a back up generator to be set in place and be hooked up to the 200 amp imput and a switching means to re-energize. There are two ground rods that exist for the transformer. Can the new back up generator grounding electrode be hooked up to these existing rods, or do they need a separate ground rod?