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.

Gives new meaning to "field installed" Just curious, what happened next i.e. pointing this out to the owner and their response?

I work in facilities at a university so I guess you could say I am the Owner. I got with our on staff electricians and they took out that "main", landed the feeder on the buss and changed the fuses out back at the distribution board to 100A. Everyone claims ignorance as to when, who and how that got installed. I'm still not wild about the feeder passing through another panel cabinet but at least it is electrically safe now. We'll re-do the feeder when we can schedule a shutdown for that panel.

Let us not ignore the use of white wire for phase conductors either.....


What type of breaker was that?