RV Designer S971 AC 30 Amp Receptacle In Plate, 30A / 125V, White. 30 Amp, 125 Volt, NEMA TT-30R, 2-Pole, 3-Wire Fits all wall-plates with 2.15" diameter center hole Black outlet made of thermoplastic body and heat resistant material Flush-mount devices fit single or two-gang outlet boxes Easy to wire terminals accept up to no. 4 AWG conductors Terminals marked for easy identification and fast wiring