RV Repair: 50 amp outlet, confussion, prong

Question
Hi Ron.If you could help me understand the difference between the 50 amp and 30 amp outlets I would appreicate your advice. Is the 50 amp a 220 line ? with a 20 and 30 amp or is it a 50 amp at 120 ?  To add to the confussion is the 4 prong plug 50 amp ? Thank you for your help ! Larry

Answer
One supplies up to 30 amps of voltage, one supplies up to 50 amps of voltage.  30/50 amp outlets are usually always 220 volt.  The 220 volt plugs are configured as to not to be confused or interchanged with the standard three prong 110 volt plugs .  A 220 plug has two hots, a neutral and a ground whereby a 110 volt plug has just one hot, one neutral and one ground.