It is possible to connect your RV to a house wired for 110 or 120.

The dryer will not be an indication of a power change in your RV. If you have a dryer in your rig, then that would be an exception to the standard electrical rule that is used across the industry. Almost all electrical outlets and appliances in an RV run on the 240/120 circuit and use 120 volts when turned on. If the outlet has spots for 4 prongs, usually 3 flat and one U-shaped, then that is the type of plug you will need. To make things simpler, you have to match the plug to the outlet in your RV. Either you fry your RV’s electrical system or you start a fire. If you have a 4 wire plug, you cannot plug it into a 3 wire outlet. If you have a 3 wire, then you cannot connect it to a 4 wire outlet. What matters is how many wires are coming to the plug or the outlet. The standard system is a 240/120 or a 120/240/ It doesn’t matter which order those numbers come in. Yet, when you do that, you may be even more confused.

Sometimes, you have to go to the horse’s mouth, a qualified electrician, and get them to explain it to you. The numbers they may understand but they do not understand that even when the numbers are the same, the plugs will not work in the same system. The problem is that for most people who are not electricians, the electrical world can be quite confusing. You can find 3 pronged 50 amp power cords, especially on a welder, that will not work in a 4 plug 240 outlet. A three-pronged plug means that there is no neutral wire and it is a true 220 or 240 plug. Everything is now 240 and an RV electrical system is 240/120.

There is no 220 in America anymore, at least according to one electrician. Most RVs run off the 120-volt system which means that if you plug your 4 wire 50 amp power cord into a 3 wire system, you may end up frying all your electronics inside your RV.

50 amp breaker