Hello all, I am having trouble understand the code reference to installing a ground lug in an enclosure. In this case it's a disconnect. I understand you have to scrape the surface clear of any paint or other similar coatings to ensure a good ground connection. When a disconnect is sometimes supplied with a nuetral bar kit, it has an option to be grounded with a ground screw that is supplied with the disconnect. The neutral bar kit is mounted with a plastic isolation bracket. This means that if I install the ground screw to bond the nuetral bar kit.....it's only grounded through the threads in the enclosure bad by the thread-forming ground screw. I'd like to install a double barrel lug to ground everything. What I don't understand is why I have to scrape the paint off the enclosure and yet if I just use the nuetral bar kit as a ground bar (no nuetrals involved...just ground) a threaded tap will be just fine. Aren't I basically doing the same thing by tapping the enclosure? Is just a different lug, isn't it? I've heard before it has to do with UL listing but it still doesn't make any sense to me.