If done correctly it should be an 8ft pole with 3ft in the ground. However depending on terrain sometimes it's only possibly to get 18-24" in the ground. Then an anti spin device on the base of pole (I used to put 3 lag bolts in it). Then fill hole with concrete. Some installers may have expanding foam. But for the foam you are supposed to use am auger and the hole only 3-4" wide. Cable needs to be atleast 2" under. If you take your shovel and push into ground then pull down on handle just enough to lift the ground up, but not break through on the other side and repeat with some overlap, you can create a little trench you can slide the cable in. When your done you just stomp the ground back down and can barely tell you buried anything.