Amazon.com: General Electric 84620 5-Feet 4 Wire 30-Amp Cord : Appliances
Color code for residential wire/ how to match wire size and circuit breaker
Houseables Generator Extension Cord, Electric Wire, 3 Prong, 30 Amp, 250 Volt, Single, Black, 25 Ft, All Rubber, 10 Gauge, Heavy Duty, L6-30, Commercial, Electrical Power Cable, with Locking Switch - Amazon.com