I need to run a 50 amp circuit (120/240V) from a shed to a travel trailer that is permanently in place.
The previous trailer had 30 amp 120V service running underground to a mounted/covered outlet under the trailer and then the standard trailer cable/plug into that.
The run is ~50 ft. Running the 30 amp 120V service was fairly straightforward (big box hardware stores have the right wired for burying). But when I start looking at 50 amp things get less straightforward (to me).
I'm assuming from a brief googling of big box stores have not resulted in any results for #6 non-conduit buriable wire. So this leads me to believe that I need to run it in conduit, but then I get concerned about heat (this may be an incorrect understanding).
We only occupy the travel trailer 2 - 3 days a week for May/Jun/Jul/Aug/Sept. Most of the days are spent outside and the AC & oven will rarely be used. (I understand that you should plan for the largest load not smallest).
Can I run 50 amp (120/240V) underground? Do I need to ground the chassis of the trailer to a 8ft grounding rod? Should I use #4 instead of #6 to reduce the heat concern?