WindyNation 1-ft 6-AWG Stranded Copper Wire (By-the-foot) in the Specialty Wire & Cables department at Lowes.com
Nassau 8/2 SOOW Portable Power Cable 600V Black (50FT): Amazon.com: Tools & Home Improvement
Portable Power Cord, 12 AWG, 4-Conductor, 250' Coil, Black Carolprene Rubber Jacket, Type SOOW, 600 Volts, -40 to 90 Degrees C, UL Listed, CSA, MSHA, RoHS, Made in The USA: Amazon.com: Tools