Yes, the ball is 2-5/16"
Also, on my 2010 I have never blown a fuse using the slide or awning without being plugged in to shore power.
I have bought spare fuses and keep them in the trailer, but in 5 years I've never blown one.
I will be adding an electric jack in the next couple of weeks.
2010 Jayco JayFeather 213 EXP
2016 Ford F-150, 4x4, 3.5L ECOBOOST, MaxTow, Supercrew, 6.5FT, 3.55 axle