I can't (won't) offer much advise because IANE (I am not an electrician) but soon I'll be doing same/similar. I'm planning parallel with a separate cooling fan circuit. I belive that any hardware store can supply the proper solid wire. color counts. Two-prong or three-prong is OK (I think) as long as either is properly grounded. I'm not planning a separate fuse/circuit breaker but do plan on uising it in an outlet that is not on an already heavily loaded breaker.
Here's a web site I think might help... or maybe it just confuses, but I find I need this kind of aid whenever trying to burn my house down using DIY electrical work: