2 days ago · THHN Cable: 0.93: 500-750 MCM (Bare Bright Inside) 1.25: Hollow Heliax Wire: 0.69: Romex Wire: 0.74: . you save 1,115 kg of iron ore, 625 kg of coal, and 53 kg of limestone from the current stockpiles. When you recycle a ton of aluminum, you save up to 5 tons of bauxite. . Thanks so much for pointing out that recycling scrap metals can .