Closed that post to soon.From what I can see it appears that these wires were overtouqued twice.Maybe a panel guts change out.That was the way it was found on a home we did. :roll:
Wayne, when I first saw this picture that?s what it looked like to me but since no one else questioned the silver color I thought my eyes were deceiving me.
This is usually the result of a square tip driver in a battery drill or a square tip screwdriver in the hands of an inexperienced ground rod installer!
Usually a phone call to the forman takes care of the problem.