PVC Pipe & Using PVC Conduit In Conjunction With U/F Cable

Hi - I am installing outdoor lighting on top of 5 columns I've constructed within a retaining wall.The total run from power source to last light is 130 feet with a few curves and 90 degree turns in between the columns.From the power source to the first column, (30 feet) the land is low and prone to flooding in the winter & spring. Also, there is a tremendous slab of concrete buried less than a foot under grade in this low spot (original, incorrectly placed foundation for house)."CAN" I run UF #12 INSIDE sched. 40 conduit or will this cause it to overheat in the summer?? Also, From the first column forward, can I run the UF wire attached to the back of the retaining wall 18 inches down (wall is 12 inches thick)? Or should I use conduit all along the course? The wire will be sitting in drainage gravel behind the wall. Lastly, I want three lights on one dimmer switch, and two on a separate dimmer. Should I use three wire or run two separate courses of two wire? Thank you so much for your time!

It is perfectly fine to install U/F CABLE inside PVC conduit. Officially, both PVC or U/F cable should be buried at least 18" to comply with NEC regulations whenever possible. If you want to control your lights seperately it will necessary to install a three wire sytem with a ground or two 14/2 U/F CABLES. I would use at least 3/4" or 1" PVC to make the installation easier. You can use liquid dish soap as a pulling lubricant. If you need any lights, you might check out our full selection of LANDSCAPE LIGHTING PRODUCTS.

Labels: Cable Lighting Systems, Landscape Lighting, Outdoor Lighting Accessories

posted by xinger @ 1:13 PM