Came across this today while surveying. The original drawing shows this panel with a 100A branch mounted main. Well, someone needed that breaker for another panel and removed it and installed this instead.

Not in the photo: 4/0 feeder spliced inside an adjacent panel with #2. #2 goes through wireway to this 200A “gutter mounted” MCB which had been removed from the adjacent panel. Adjacent panel was re-fed from a different source. Sheesh!

Oh, and the 4/0 feeder (and the #2 splice, and the 200A gutter main and the 100A panel) are protected with 200A fuses. READ MORE