Installing a 50/30 subpanel

Price of the part on the link above was $120, same as Amazon Prime. I think one of the BigBox stores has it also. I'd guess HD, only because it's closer and I'm there more... Don't know if that would be more convenient or less expensive for you.

Welcome to the Forums!

Clicky

In copper, I believe the standard is 6/3 with ground, if the run is under 50? feet. (ON EDIT: I just read where you're 100 ft. from the panel, so you might want to go to 4 gauge. That said, it's rare for a 50A rig to ever draw anywhere near the full 50A per side, so you could probably get away with 6 gauge. That's what I used and I have sufficient voltage at the rig even when both AC's are cranking. My run is near 100'. However, if you have low voltage at your main panel to begin with, you might want to minimize any additional voltage drop by using the 4 gauge.)

I've installed 4 of those (or similar) power outlet boxes.

The breaker in the main panel should be 50A double pole.

The shore power cord on a 50A rig is 6/3 with ground.

This link might help.

Good Luck,

~Rick