Interesting. Im learning a lot. So in this scenario to avoid having 3 ground wires all under the same screw on the service ground (my electrical panel) could i not simply run my coax and ground wire from the antenna and mount to the grounding block and screw the ground wire from the mount to the same screw as the ground wire leading to the service panel. In this case, on the grounding block there would be the mount ground wire and the ground wire leading to the service ground under one screw and on the actual service ground there would be the the existing Bell Canada ground wire and i would add the grounding block ground wire under that same screw. This way i wouldnt have 3 ground wires on the service panel and i wouldnt need to add an IBTB.
Your post makes reference to not removing the house system from its own ground for even a moment but is loosening the screw that Bell Canada is using on the service ground to add a second ground wire considered removing the house from its ground?
Thanks for your contribution
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