2-PK Leviton WHITE 6-FT Safety Extension POWER CORD 10A 125V 1250W NEW 2541-6 | eBay
LEVITON 515PV & 520CV PLUG YELLOW 15 AMP 125 VOLT to make extension cord | eBay
Leviton 15A 125V 2-Wire 2-Pole Easy Wire Cord Plug, White - Parker's Building Supply
I'm confused. Leviton plug instructions specify (a) black wire to brass screw, (b) green wire to green screw, (c) white wire to silver screw. Romex 12/3 has four wires: (a) red, (b)