Usually you can buy it by the foot.. I suggest you also pull in a pull string made out of plastic for future adding of wires.. Good idea to oversize the conduit for future and ease of pulling too.. This is my professional advicewell phooey I thought I might need to buy a 500ft roll. O well I dont want to do it twice so I suppose I guess I am going to buy the right stuff. Home Depot has THHN and THWN so I better go look.
Thanks Ray
Pete
Ray