With most things electrical it is like the Senior answer to the question "Boxers or Briefs"
The youngsters said "Briefs"
The middle aged said "Boxers"
The seniors "Depends".
Now the 50 amp cord is designed to carry 50 amps for, based on the wire size, about 100 feet if I'm not mistaken.
But not many motor homes pull the full 50 amps on either leg. Usually around 30 is peak load
50 amps round trip on one leg 100' takes 4ga wire
but 30 amps takes 6
This calculator may be a bit confusing espically at 50 amps because you use every amp in the less loaded leg twice. (IE if one leg is 30 amp and one is 20 the effect is to reduce voltage drop.
