I found this 200-amp panel in a bedroom closet. The 200 amp main breaker is not being used. The 100 Amp breakers on the lower left are feeding the panel. I have never seen this before. Is this OK? (There are many more issues with the panel but this I have never seen)
The back-fed breaker requires a retention clip or bolt to hold it in place otherwise it’s permitted. As stated there are other issues starting with the location in a clothes closet.