Hi All, Fairly new to the forum but always reading the new posts to help educate me. I have a question on the attached images. This was a 4 point inspection I did for an insurance agency and I found the exterior panel double tapped at the main lugs to feed a sub panel (also exterior). The double tap was also copper and aluminum mix. I also found the interior sub panel had mixed grounds and neutrals on the same bus and red colored wire? I was assuming the red wire was another ground as it rose up to attic and I believe ran to the exterior on the opposite wall where the meter is but cant be sure.
The agency said there was nothing wrong with the sub panel arrangement? Am I wrong to call it out, I thought the only place the neutrals and ground could be on the same bar is in the service panel? I also thought any wire that was a ground should be green or copper or marked? Excuse the pictures I had difficulty getting them from my tablet software.