We put a new roof on the garage and put the dish back and had a service call for realigning. Tech just left after realigning my dish and installing new wire from dish to receiver, since he said the old wire needed to be changed. I noticed the dish isn't grounded now tho. He said the grounding block was on the roof and the ground wire that runs to the house ground rod was never attached to it. He installed the new grounding box near where it comes in the house but it's too far to run a grounding wire to my main grounding rod now. Should the dish be grounded? Can I leave it ungrounded?