This isn't really the cable you want. The cable you have is meant for power company distribution with 3 "hots" and a neutral. That's why there aren't clearly marked neutral AND ground wires. Plus it's only rated USE-2, so it can't enter a structure. This cable must stay outside.
http://www.southwire.com/ProductCat...tmlpreview=true&token=40&desc=Quadruplex 600V
What you want is mobile home feeder with dual rated insulation (USE-2 and RHH, etc) and marked neutral and ground conductors. This can enter a structure.
http://www.southwire.com/ProductCatalog/XTEInterfaceServlet?contentKey=prodcatsheet15