Can I connect one phase of a three phase output to one side of a 240 VAC panel and another phase to the other side if I open any and all 240 VAC breakers? This will be a temporary fix until I locate the schmematic to the 15 kW generator. There may be more current flowing through the neutral, but if the wiring can handle it and the generator is fuse I should not have a problem - I think! Plese let me know if what I want to do at our ranch will work.

Thanks,

AlexS

I'm going to say NO. If you had a 240 to 240 CT transformer, then you could pick up the neutral. The generator might not be happy being oddly loaded.

Did you mean "disconnect all 120 V breakers"?