RV Park calculations

[storeytime]

I have been asked to design and install the electrical system at an RV park. I have never done it before. I have read all the posts I could find here. I'm just not sure as to the best way to design it for this layout. It has 15 spaces. RV electrical box with 50A, 30A, and one 20 amp GFI. Each receptacle has its own breaker in the box. The service is situated between space 3 and 4 about 60 feet perpendicular to the line of spaces.
I had planned on feeding one line (1 - 3) with one conduit run and then one conduit for spaces 4 - 15. The distance between the 3rd space and 15th is about 420 feet. They are all laid out in a straight line. I'm just not sure (due to no experience on these systems) if the best way economically is to feed each spot in line with large enough wire to account for voltage drop or place a sub panel or two along the way. Also, the owner had picked out a box with pedestal that costs much more than just the box mounted on a wooden pole support. Is there any advantage, electrically, to using the pedestal such as lug size, etc.? I appreciate any help.
PS - This is in Texas, very hot temperatures, so I don't know about the demand factor.

 

[-marty]

Years ago i helped an engineer with an rv park. I went to the Mid-West rep. They sell lots of equipment for rv parks. He had lots of information. Start there. Sorry I can't be more help.

 

[jtester]

I've designed a number of RV parks. First, if you provide a 50 amp receptacle at each location, you will have very large services. Provide as many as the Owner wishes, but 551.71 only requires 20% to be 50 amp. I have had Owners want 50 amp pedestals at each location, it depends on how classy the resort is.

We often run a 200 amp or so feeder along the line of 50 amp pedestals, and make taps into each RV pedestal. That seems cost effective given voltage drop considerations. I have resorted to aluminum conductors in large developments, with pin connectors on each termination.

If you trust the demand factors of 551.73, and here in New Mexico I don't, you can put 10 pedestals on a 200 amp feeder.

Jim T

 

[storeytime]

Thanks for the help. Sorry I haven't replied sooner. Been gone for a few days. This is going to be a pretty nice development. It has a lot of trees, going to eventually have a driving range, putt putt golf, and fishing pond. So, I think he's going to want the 50 at every sight. I did ask the RV box company for help. He was very helpful. Sent me a real good layout. Thanks again.