I annealed some # 8 copper wire in a barbeque on charcoal briquettes from instructions found here. I've been looking around but I can't find anything thicker. Correct me if I'm wrong but it must be solid # 6, 4 or 2 not stranded to make # 6 etc. It also must be sold by the foot as I don't need 100', which means probably scrap. Home depot doesn't have solid, they have a Bare Copper # 3 (ground I think) but it is stranded # 3/7. The guys there don't even know what it would be used for. Can anyone say where heavy gauges like this are used, commercial building wiring, heavy equipment or could anyone name a cable produced for special commercial or industrial applications that consists of of these gauges.