<div dir="ltr">This. Very little will protect you from a direct strike.<div><br></div><div>Working for a WISP for a long time as a past life, I've seen radios physically split in half. Chunks of concrete taken out of walls near the equipment. Black ethernet ports that have functionally soldered themselves into the jack. Six figures worth of lost gear over the years (Does sound like much, But at ~$80 a pop for cheap wisp gear. That's a lot of equipment.)<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><br></div><div>Outside of a direct strike, You can still melt gear left and right. The fix is no one solution, But multiple.</div><div>1. Shielded Ethernet with proper shielded and bonded ends.</div><div>2. Proper Grounding</div><div>3. Ethernet Surge Suppressors.</div><div>4. Proper Grounding.</div><div>5. Proper Grounding.</div><div><br></div><div>The key is to make your sensitive electronic equipment a higher resistance path instead of your grounding system. You're going to get inductance build up on cables you just have to get it to ground through something that isn't your site switch/router. And it's going to get there one way or another. Sometimes this can be harder then one might think. Even considering sinking your own ground rod, And replacing it every few years. As a ground rod becomes less and less effective with every strike (Depending on what it's sunk in). Ethernet Surge Suppressors CAN help. But only in assisting in getting whatever was already on the cable to ground.</div><div><br></div><div>And don't forget ground potential differences between different grounding systems.</div><div><br></div><div>Doing the above will get you through most near by strikes. But all bets are off on direct strikes. The above can also help you with a ton of other interference. Like a giant FM transmitter running at 100KW a stones throw away from your equipment but that's another story for another thread.</div></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 14, 2019 at 1:34 PM Chris Knipe <<a href="mailto:savage@savage.za.org">savage@savage.za.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Think surge protectors will protect against strikes that is far away, and the residual surge it creates.<div><br>A direct strike? Don't think there's anything that will really protect against that. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 14, 2019 at 7:29 PM <<a href="mailto:bzs@theworld.com" target="_blank">bzs@theworld.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
Are "surge protectors" really of much use against lightning? I suspect<br>
not, other than minor inductions tho perhaps some are specially<br>
designed for lightning. I wouldn't assume, I'd want to see the word<br>
"lightning" in the specs.<br>
<br>
I once had a lightning strike (at Harvard Chemistry), probably just an<br>
induction on a wire some idiot had strung between building roofs (I<br>
didn't even know it existed) and the board it was attached to's solder<br>
was melted and burned, impressive! More impressive was the board<br>
mostly worked, it was just doing some weird things which led me to<br>
inspect it...oops.<br>
<br>
My understanding was that the only real protection is an "air gap",<br>
which a piece of fiber will provide in essence, and even that better<br>
be designed for lightning as it can leap small gaps.<br>
<br>
Check your insurance, including the deductibles, keep spares on hand.<br>
<br>
P.S. My grandmother would tell a story about how what sounded like the<br>
ever-controversial "ball lightning" came into her home when she was<br>
young. Good luck with that!<br>
<br>
<a href="https://en.wikipedia.org/wiki/Ball_lightning" rel="noreferrer" target="_blank">https://en.wikipedia.org/wiki/Ball_lightning</a><br>
<br>
-- <br>
-Barry Shein<br>
<br>
Software Tool & Die | bzs@TheWorld.com | <a href="http://www.TheWorld.com" rel="noreferrer" target="_blank">http://www.TheWorld.com</a><br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_-7635992739103254441gmail_signature"><br>Regards,<br>Chris Knipe<br></div>
</blockquote></div>