Hi everyone. I'm a longtime Directv subscriber and I've always done my own installations. I recently moved into a new house and decided to mount my dish on a 5/8" fence post that I cemented into the ground about 20' from the house. With this type of installation is it necessary to run an 8 guage grounding wire from the 5/8" fence post to my grounding block? Or does the coax cable to the grounding block take care of this? The grounding block is grounded to the electrical panel ground with 8 guage wire. Thanks!