In my application though there really is no split phase, at least not inside that inverter there isnt.
Both of those 3 breakers there are separate 240vac circuits. Now, that 3rd one is the feeder for my critical loads panel, and that panel IS setup to split phase off of that 3rd breaker though to feed all my 120v critical load breakers.
Sorry for being dense, but Im still not understanding your post at 7:00:03AM (CST), are you saying that in my case when I clamp on the ferrite over the wires going into that 1st breaker and it starts hissing, that it should stop if I also get the ground wire in the ferrite as well?