tdhorne, I run 4 wire USE all the time, we call it trailer cable up here. Mostly for feeders to trailers from the pole. But I have to pose a question, what is the difference in terms of conditions, between the underground conduit and the side of the house the SE would be subject to? Lots of rain, snowload, and ice up my way, can't see how that would hurt the cable any less than being in the ground with the frost.
