1 Calories Burned For Walking: 3.15 mph (19 minutes per mile). 2  Calories Burned For Walking: 2.85 mph (21 minutes per mile). 3  Calories Burned For Treadmill: 5 mph (12 minutes per mile).4  Calories Burned For Treadmill: 5.45 mph (11 minutes per mile). Calories Burned For Walking: 3.15 mph (19 minutes per mile). 2  Calories Burned For Walking: 2.85 mph (21 minutes per mile). 3  Calories Burned For Treadmill: 5 mph (12 minutes per mile). 4  Calories Burned For Treadmill: 5.45 mph (11 minutes per mile).
Direct Burial of Cables or Conductors. Underground feeder cables, labeled UF, can be buried without additional protection from conduits because they have a tough jacket designed for burial. Bury UF cables 24 inches below the soil surface, and 18 inches deep when protected by 2 inches of concrete. For all other applications, the burial depth is the same as specified for conduits, except that conduits are required for UF cables in 2 inches of solid rock.
In horizontal geothermal ground loops, several hundred feet of five to six feet deep trenches are dug with a backhoe or chain trencher. Copper coil is then laid in the trench and back filled(with conductive grout solution).A typical horizontal ground loop will be 150 feet long for each ton of heating and cooling.n horizontal geothermal ground loops, several hundred feet of five to six feet deep trenches are dug with a backhoe or chain trencher. Copper coil is then laid in the trench and back filled(with conductive grout solution).