Then yes, at a minimum, you'll have to swap out your 10 awg power entrance cord to at least a 8 awg. If you are making an extra long cord, or going to put and extension on it ever, I'd go with 6 awg to combat voltage drop. As far as the breaker swap, I'm new to TT's so I'm not sure if they are swappable or not. If the breaker has a brand name on it, I can probably point you where to get one. Lowes carries Square D, Murray, Cutler BR and CH, and GE if they are using standard breakers in them. If not, find the brand and model number and google.