Hope you are well. 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?