Conntek 1-Feet Generator Adapter Plug (Male): NEMA 5-15P (Standard 3-Prong Household) Connector (Female): NEMA L5-20R (Locking 20 Amps 125 Volts) Cable: STW 12/3 (Industrial Grade), Approval: UL, C-UL Listed Max Rating: 1,875 Watts Use in Construction and Industrial settings