I had been connecting the TT with a 12/3 extension cord for way too long. No problems as the only thing running was the A/C set at 80 and the small fridge in the outside kitchen which keeps bottled water cooled. I kept saying "I'll put in a hardwired outlet when it gets cooler". It doesn't get cooler in SW GA. So I bit the bullet, got up at 6 A.M. hoping the attic of the shop was cooler but it was still 78 degrees outside at 6 A.M. It seemed like it was 100 or better in the attic. I really wanted a box with 30 amp for the TT and 20 amp outside outlet with breakers in the box but no one around here has one like that. Every place wants to order it and it would take two weeks to get it here. After running the wiring I was ready to finish this job so I installed a 30 amp RV outlet with a dedicated breaker in the panel in the shop.
That's actually the back plate for mounting a coach type light to a wall. It goes on before the siding so I had to cut a rectangle out of my siding then push it into place, I didn't nail it. The electrical box is held on by screws that go into OSB under the siding.
2015 FR Freedom Express 310BHDS pushing a 2014 GMC Sierra CC