No AC unless 30 amps
Posting for a friend ... She has a new Jayco Melbourne. It’s on a Sprinter chassis. Her AC works fine if she’s plugged into a 30 amp circuit (her RV doesn’t have a 50 amp plug). But plugged into ...
Forum Discussion
Just to clarify here for those that are following along, that combiner cord is designed to let a 50 amp 4 wire (2 hots, 1 neutral and 1 ground) RV plug to plug into a pair of 30 amp 3 wire (1 hot, 1 neutral and 1 ground) outlets, in this case with a pair of 30 to 15 amp adapters. The 2 hots would feed to each side of the 50 amp RV, they would not be combined, half the breakers in the breaker box would get power from one side and half from the other.
Now where the problem comes in is the next dogbone adapter in line is to let a 3 wire 30 amp RV plug into a 4wire 50 amp outlet. This works by connecting the single hot line in the 30 amp plug to only 1 of the 2 hots in the 50 amp outlet. If it were to connect to both we would have a direct short and and instant breaker trip since there is 240volts across line to line in a 50 amp RV outlet.
Now where the problem comes in is the next dogbone adapter in line is to let a 3 wire 30 amp RV plug into a 4wire 50 amp outlet. This works by connecting the single hot line in the 30 amp plug to only 1 of the 2 hots in the 50 amp outlet. If it were to connect to both we would have a direct short and and instant breaker trip since there is 240volts across line to line in a 50 amp RV outlet.
