Total posts : 45366
Aha! You’ve fallen into the grounding legalities loop! If you truly believe that the FCC Part 15 regulations specifically spell out what they mean by grounding strap and you feel that you can’t use an elevated antenna because of that interpretation, then you can’t use your metal roof and sleep at night without worry. Imagine the havoc you would cause if your metal roof happened to be grounded!
In my opinion the FCC part 15 ground strap reference is vague. It does not specify to what the strap can be connected. I have an FCC registered part 15 transmitter that came with an alligator clip ground wire. The instructions say to clip it to a cold water pipe, electrical ground, or large metal object. Okay, that doesn’t necessarily prove anything.
However the FCC revised the part 15 regulations late last year. They had the opportunity to address this issue, yet they made no changes in regard to part 15 am grounding. If this were truly an important issue I’m sure the FCC would waste no time in clarifying the regulation. I know that someone got a reply from the FCC on this board that the elevated ground system was not in compliance with their interpretation of the rules. So that amounts to another opinion on a vague regulation. I have never found a reference anywhere to any FCC action based on an improper part 15 grounding system.
So it all comes back to you. If you truly believe that the ground strap cannot connect to an elevated ground, you would be wrong to use your roof. In my case I believe the regulations are too vague to be enforceable and I’m prepared to defend my installation if needed.