Amazon.com: RVGUARD 30 Amp 15 Foot RV Extension Cord, Heavy Duty 10/3 Gauge STW Cord with LED Power Indicator and Cord Organizer, TT-30P/R Standard Plug, Green, ETL Listed : Automotive
Extension Cords - Load Rating vs. Wire Gauge and Length
The amp ratings of extension cords vary wildly by whose chart you look at. Is there a standard or final authority like UL or NFPA? - Quora