I'd recomend a 50 Amp minimum breaker, and number 6 stranded copper wire, or even better, a 60 Amp breaker and number 4 wire for the feeder from the panel to the outlet, and an extension made up of number six wire up to fifty feet. Over fifty feet, go up one size to number 4 wire. Use plugs and outlets rated at 50 or 60 Amps. you will probably have to order this stuff from an electrical supply. Also, seek out the assistance and/or advice of a qualified Journeyman or Master Electrician.