I am planning on installing a 30 amp RV receptacle on the outside of my garage next to where I park my RV. Found and ordered a box online that contains the 30 amp and a 20 amp circuit, both GFI protected. It is just what I have been looking for. The 20 amp allows me to power my battery tenders when I don't want complete shore power. The price if anyone is interested is $115.00. The same unit from my local electrical supply is $300.00 +. GE1LU032SS is the the part number for the box.