Main lugs AND main breaker?
Suppose I wanted to add a second panel, just for more spaces, to comply with my "circuit assignment OCD", directly next to an existing panel, wanted to stay with only one service disconnect, and didn't want to install the second as a subpanel...
The first panel has a 100A main breaker. It is a model which shipped in two versions: one with breaker, one with lugs. The main breaker assembly bolts onto the bars.
Is there an approved method where I could add lugs at the point where the main breaker meets the bus, and attach the second panel to those lugs?
It's a hypothetical question at this point - I already abandoned the idea and managed to consolidate everything into one panel (I had to give up a couple bits of OCD and use some tandems, but it's all in there), but I'd still like to know the answer to this.