Southwire 125-ft 8 / 3 Romex SIMpull Stranded Indoor Non-Metallic Wire (By-the-roll) in the Non-Metallic Wire department at Lowes.com
8/3 SOOW 8 Gauge Portable Power Cable Cord 600 Volt, Non-UL
Amazon.com: Cartman 8 AWG Battery Cables, 8 Gauge 24 Inch Power Inverter Cables, 3/8" in Lugs for Car Marine Solar ATV Lawn Mower Motorcycle (Positive and Negative) : Automotive
Southwire 125 ft. 8/3 Gray Stranded CU UF-B W/G Wire, Black - Amazon.com