Code rage,
I'm am currently setting up a system similar to what you used with a separate 110v and 240v. I'm using a HD spa panel with GFCI. The breaker has a neutral pig tail which I understand I do not need in order to be gfi protected. The question is what to do with the pig tail and the ground from my rig. Do I just secure the pig tail to the neutral bus which goes no where. Then secure the incoming neutral (used as ground) and the ground from my kettle to the ground bar in the spa panel? I think this is correct. Anyone chime in please.
I assume you are only using the spa panel for 240 volts with no neutral output. In that case, see post #7 above for how I wired mine. AFAIK, the pigtail has to be tied to neutral/ground in order for the GFCI breaker to function.