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Old 06-03-2014, 05:54 PM   #16
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Grounding roof top antenna to CEE


Why are you guys even talking about LPS when that is NOT what the OP asked?

To the OP, i posted everything you need to know is post #12.

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Old 06-03-2014, 06:37 PM   #17
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Grounding roof top antenna to CEE


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So according to that section, a minimum gauge of 10 is required for the ground wire.

Does this wire size requirement also apply to CATV and phone drops?
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Old 06-03-2014, 11:52 PM   #18
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Grounding roof top antenna to CEE


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So according to that section, a minimum gauge of 10 is required for the ground wire.

Does this wire size requirement also apply to CATV and phone drops?
Yes it does.
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Old 06-03-2014, 11:53 PM   #19
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Grounding roof top antenna to CEE


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Originally Posted by Know A Little View Post
The question was can he run the down wire associated with a possible lighting hit to his antenna, The down conductors for an LPS are commonly run through a house how is this any different. Very common with existing LPS systems for new antennas or dishes to be connected to the LPS system.

Believe me a lightning strike could care less if this is an antenna, a Franklin Rod or the corner of his house when the item takes a direct strike.
That is why you install an ADU.
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Old 06-04-2014, 06:12 PM   #20
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Grounding roof top antenna to CEE


Thanks everyone! The discussion and references have helped a lot. There doesn't seem to be any issue with running the antenna ground through the house (now I finally see 810.21G, don't know how I missed it) though I need to figure out the best route to make it as straight a run as possible and that may well be outside.

It looks like there are no ADUs available for TV antenna coax so I'll need to use a grounding block instead (810.20 A Exception). Is there any reason I can't just run the mast ground wire as a continous wire passing through the block on the way to the CEE so that it grounds both the mast and the coax?
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Old 06-04-2014, 06:53 PM   #21
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Grounding roof top antenna to CEE


You can get the ADU's at L-Com.com I just went with a Gas Discharge that I got from Parts Express. It is at the Static block's for my Coax for Internet, and the Satellite. Both are grounded to the Ground rod for the Electric drop.

The Mast would be grounded through the Static block that the coax is attached to if you place one up where the antenna attaches. Just do not ground the static block on the side of the house if you go with one up on the mast, where the antenna is.

Some areas allow that if the mast is deep enough in the ground. Attached to the grounding system for the home, it would pass. It is something that is going away. Due to too many people cannot do it correct anymore.

Just remember that if you do not do the grounding correctly. You will end up with a Ground loop and cause other issues. If you need to dig deeper into this. You can get a copy of the IEEE Emerald Book online, or from your local library. It covers more into detail about electronic grounding systems.

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