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RE: Fm antenna ground question

The short answer is Yes, and is mandatory by the National Electrical Code (NEC), Article 810. The highest piece of metal sticking upwards on top of a structure is essentially an Air Terminal of a lightning protection system. Trees and where you live don't enter into the requirements at all, and the NEC is adopted by all 50 states.

The antenna mast is required to be grounded.
The (assumed) coaxial cable antenna lead-in is also required to have a listed antenna discharge unit (aka: lightning arrestor) or - more commonly - a coaxial cable shield grounding block.

How this is all accomplished and sizes and types of wire used is beyond this note. Essentially everything including telephone service and cable TV coaxial cable is required to be interconnected and grounded at a single point; typically at or near the incoming electrical service.

The referenced linky below is an OK general outline. You can ignore the parts dealing with ham radio transmitting antennas. Note that it is based on the 2011 NEC, which is the basis of the 2013 CA Electrical Code, which is the current governing document for (assuming) Mendocino County. AFAIK.

The user instructions for any receiver or tuner I've seen always have antenna grounding instructions included.


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  • RE: Fm antenna ground question - cdb 06:41:09 03/24/17 (0)

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