Re: Lightning protection for outdoor ethernet Grounding rod questions etc..

If you drop a ground rod at the outbuilding it will need to be bonded to the
rod at the mains. Check the codes for the gauge of the wire needed.

Leonard

"Michael Kennedy" <Mikek400@xxxxxxxxxxxxxxxxxxx> wrote in message
news:a-WdnZQibrVYN5LZRVn-vg@xxxxxxxxxxxxxx
I have a ethernet cable that runs from my house to an out building at my
house. I live in Florida and we have a real problem with lightning around
here. I plan on using a a TII telephone lightning arrestor on each end..
I'm talking about the kind that the telephone company puts on the side of
your houese with the gas arrestors inside.

I think this will work but I have one problem.. I don't know if a ground
rod at the out building will be enough to ground a lightning strike. The
building doesn't have a ground rod right now but I was planning on putting
one in for this..

How do you get a good ground with a ground rod. I have tried driving one
down but when I ohm it there is always a lot of resistance vs the power
company's neutral / ground. I was told that a good ground rod will have
about 15 ohms of resistance between the rod and the system ground.

I would just hook this arrestor up to the out building's ground wire, but
the ground and the neutral are tied togeather and I don't think there is a
very good ground out there because the ground on the CATV wire will shock
you if you touch it and a ground in the building out there. On the
voltmeter it reads about 3v between the catv wire ground and the bldg
ground.. So I think my ground is overloaded or has a bad connection at the
breaker pannel.. It has 2 legs of 120v and one neutral. There is no
seperate ground wire.

Thanks for any advice / help..

- Mike



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