30AMP Dryer male plug to 50AMP welder Female receptacle. Connect your welder directly to the wall plate socket of 30amp dryer socket (Nema 14-30R Socket). 1.5-Foot Nema 14-30P to 6-50R Welder Adapter Cable, 14-30 30A 4-prong Dryer to 6-50R, STW 10 AWG Heavy Duty Cable.