Just for the record, I have a 1975 NEC book and the # 8 bonding wire was required back then under sec. 680-22. When I started doing electrical work way back then, the pipe from the wet niche to the deck box was a solid piece of brass conduit. That would almost act as the bonding connection but that was a long time ago and I don't remember if a second # 8 was required inside of the pipe. ( I don't believe so) However I started doing electrical work when I was 5 years old and that is why I don't remember that far back! LOL
