Sorry if the question sounds dumb. I've hooked up many separately -derived systems, in hospitals, using 4-wire transfer switches and always did them correctly. I have a small 240/120 generator that I want to connect to my house, but just using a small panel with outlets underneath. Never touches utility wiring. Generator neutral and ground are connected at the generator. 4-wire cord plugs into outlet on generator, and goes to 4-wire inlet at house. 4-wire from there to sub-panel, which has un-grounded neutral bar and separate ground bar. Panel would have no utility power in it. Does the generator frame, which is grounded, need to be connected to the grounding electrode system of the house? It would be easy to do since there is a driven rod electrode, part of the EGS, close by. I was just concerned that the ground-fault breaker on the generator may not work correctly if I do. I've read 250. many times and keep getting confused.