I am an electrical contractor so the box you got is fine set that along side the meter that should be a 200 amp uninterruptable or lever bypass type. You will need 2″ PVC to go between the meter and the panel as well as into the ground for the utility company to install their wires into. The trench is by code supposed to be 2′ deep and the conduit should be the same depth or just slightly shorter. Be sure to use proper connectors and bushings on the conduit both ends and the connectors and also strap or support your conduits as per code. You will run 3 4/0 aluminum wires from the meter to the panel and ground everything at the panel including 2 8′ ground rods driven all the way into the ground at east 6’apart and meeting the code resistance of less than 25 ohms to ground, and attached to the service or panel with #6 solid ground wire ran up the post or in another conduit not the same conduit as any of the other wires. Be sure to install the green bonding screw into the neutral bar of the panel as well. Then run #6 3 conductor wire to the RV post with an additional #6 wire for a ground that is required by codes and at the RV post you will have to separate the neutral and ground connections, do not bond the neutral bar to the steel can with the green bonding screw then hook up as normal.
Lots of info here as and other said we do this for a living so we know the ins and outs of the job. It seems easy but there are getting to be so many rules and especially at the residential end of the trade it is hard to keep up with and trying to read the code book is confusing even for us that have been in the trade for over 40 years.
Yes I know electricians are expensive but we have state licensing, insurance and continuing education to keep us up to date and properly equipped to serve the public. the cost of doing business anymore is a whole different topic that is way to complicated for a public forum but there are others here in the same position as me and they understand.
even giving information like this out make us liable so most do not like to give any information because if we do and someone does not follow our information to a t and something bad happens it could be considered to be our fault.
Good luck to you and everyone be careful taking guidance from the guys at the big box stores as you may find some that know the trade and others not so well. Always hire a professional. I do a lot of work with homeowners to help them save money we show up get them set up with the proper materials and methods let them install the easy things do the trenching, pound the ground rods etc… then we return to do the connections and assure it is proper, many electrical contractors will not do this. I just cannot say no to good people.
