I work for a Utility and we hooked up a 1200 amp service today. From the 1200 amp disconnect they ran a #6 equipment ground to the main sub panel. The inspector allowed this because the #6 wasn't needed as it was run in EMT. Another install involved a feeder tap from a 400 amp bus to a 200 amp disconnect. The equipment ground was a #6 that was too small for this install. The inspector said it ok because it run in EMT conduit. Is there anywhere in the code that states if a redundant ground is run, it must be appropriate size? Thanks in advance.