length of 30 amp line

myredracer wrote:
The NEC and NFPA specifies where a pedestal is to be located on a site in an RV park and the NEC also specs where the point of entrance of a power cord is to be on an RV. You shouldn't normally need more than 25' of cord.

From my perspective here in Ontario that's rather humourous as I wouldn't recommend anyone head to any Ontario provincial park without at least 75' of main service cable. Most trailers are supplied with a 25' cable so that therefore means carrying at least one 50' extension - minimum. In older provincial parks such as The Pinery the most common setup is one power post set between two adjacent sites BUT because of topography that post is rarely equidistant from where two adjacent trailers would be located. Occasionally one gets lucky and 25' will do it but for sure your neighbour will have a l-o-n-g way to go. The situation is even worse in newer parks, Inverhuron Provincial Park being a great example as it was rebuilt from the ground up a few years ago and all the main service trunk lines are buried alongside the campground roads, with the campsite power posts set just in from the road. That in turn means the runs can very often be at least 100' or more to get to those posts ... last summer when we were lucky enough to get a premium site in the newly opened 3rd campground at that park I used all of my 140' to reach the post. "Shouldn't need" is nice in theory but irrelevant in practice as the amount of main service cable required very much depends on where you're camping. ;)