Willie B
Senior Member
Here, we have designers work for the power company. They help with the design of the system. If using conduit you are allowed only 360 degrees of bend. As you may need 180 degrees of bend to change from horizontal to vertical each end, you are limited. No reason not to run up the center of the driveway.I was thinking about the snow issue, since there is so much of it! Having those junction boxes sitting on the downslope side on a fiberglass base doesn’t seem smart if trying to plow snow down the slope of the mountain. I’m thinking I should trench on the uphill side of the road or elevate the boxes. Where is the trench usually, for ease of digging do people run it down the center of the driveway and put the boxes off to the sides? Upslope is where the water drainage ditch is and downslope is way below road level and forested.
Remember PVC shrinks 4" per 100 feet with 100 degree temperature change. When no snow on the driveway, cold sinks lower. It is a concern it'll shrink enough to break. I like to be 36" to the top of the conduit, 6" of sand beneath, 6" of sand above. I dig 46" deep, 6" sand. Conduit is usually 3.5", more sand 9-1/2" deep. Then backfill half way. Warning ribbon, then fill.
Certainly makes sense to run on the uphill side unless other reasons prevail.