There is a serious problem with the Electrical description of 240 Volt plug, as of Dryer and Stove. House wiring is said to be 240 only if the 2 off 110volts are connected. On the stove and dryer plugs its a 4 Wire connection and the 2 lines are truly 120 volts with one neutral common that takes the opposing load of the 2 120 volts line. It has to be wired that way so as not to overload the common line. If the 120 volts lines are not opposing, the common line on our RV will be overloaded. Welding machine, heater, and 240 Volts 3 wire plugs should be avoided. I have a Stove connection on my home and they carry 120Volts on each line with a common neutral line. We do have to understand what 120V lines AC are about before doing electrical connections for our RV. If you use a 30amp and a 15 amp combined connection the common neutral line will not get overloaded as only 45 Amp will be in the line, thats why you can buy an adapter that will wire 30amps and 15amps to 50 amp connection. It only gives you 1/2 the power of 50Amp as required by the 50Amp RV connection, so I don't bother with it anyway.