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Grounding Question (alien.top)

submitted 11 months ago by [email protected] to c/[email protected]

31 comments fedilink hide all child comments

I recently had a lighting strike and lost about $1000 worth of equipment. I'd like to reduce the chance of that happening again so I'm looking for advice.

I have a UDM in my house, with a 125 foot run underground in conduit to my barn. In the barn, I have a POE switch that feeds 10 cameras and an Ubiquiti AP. I'd like to add a ground somewhere. I just purchased a surge protector with ethernet for the barn, since the switch is currently plugged in directly to an outlet and should be protected anyway. I also bought this from APC for my equipment in the house. I was going to install that between my UDM and POE switch in the house, then ground it to an outlet.

I'm reading so much information about how to go about this. My barn is powered with 220v from my house, so 4 wires go to the barn H/H/N/G. the ground on the barn is the same ground as the house. If I use both devices can that create a ground loop in the event of a surge? I'm also reading that I can use the APC at any point on my network to provide protection. Is this correct?

Please don't suggest fiber runs, as the cable is already run and I don't plan on redoing it. Thank you all in advance.

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[–] [email protected] 2 points 11 months ago (4 children)

Please don't suggest fiber runs, as the cable is already run and I don't plan on redoing it.

You said you have conduit, right? Running fiber would literally be as easy as: unplug Cat6 -> tape fiber to end of Cat6 -> pull on other end of Cat6 -> done. If that takes you 5 minutes you're pulling too slow. Then, just throw on a couple of SFP adapters and you're solid. No more worries about ground loops, greatly reduced chance of a lightning strike frying equipment on both ends. I think that's worth a few minutes spent pulling fiber.

[–] [email protected] 2 points 11 months ago

The conduit is the easy part. Once the cable enter my house its behind a finished wall, into my attic, and down another finished wall where it enters my basement. I'd have to remove a bunch of sheetrock in the house since its stapled along the way. On the barn side I have the same issue being behind finished walls.

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