A 15/20 amp is a normal outlet like you have in your house. You would have limited items that would work in your TC on this amperage. The next step up is a 30 amp. This is what is typically seen in a campground. This is the normal circuit for a smaller TT and a TC with one A/C and less electrical demand. Then there is the biggie 50 amp. This is usually used with the bigger 5ers and MHs. It actually provides 2 50 amps worth of service meaning that it well supply 100 amps to the unit. I don't know of any TC that uses this type of service. Now if only 50 amp service is available there are adapters that you can plug into and allows you to use 30 amps cord from your TC. There is an adapter that also allows you to use a 15/30 amp outlet but it is still only going to provide 20 amps max power.
Hope this helps.
