I'm not an electrician (thus the question), but I'd like to know what is possible from a specification standpoint.
Let's say we have a standard 3 phase power supply for a commercial building. We want to supply a sub-panel with 3 phase power and the sub-panel is supplied from a 3 phase 100A breaker.
We want to supply 3 dedicated single phase 208V loads, so we'll be building effectively a "load triangle."
What is the maximum ampacity for each load?
It's confusing to me, because each leg is supplying two loads "half way." So does that mean it's "ok" to use 3 100A two-phase breakers in the sub-panel (assuming the loads are correctly distributed)?
Don't worry too much about the nature of the loads. In fact, they will be EVSEs (electric car chargers). This means they'll have a fairly reasonable impedance match, but be continuous draw (which means they'll actually be derated from 100A by 20%).