<!DOCTYPE html><html><head><meta charset=utf-8><meta content="width=device-width, initial-scale=1.0" name=viewport><title>Lightning Arrestor Installation - SCCo ARES/RACES</title><link href=/-68DF08D8-/styles.css rel=stylesheet></link><script src=/-6807DB09-/script.js></script><script>if ('serviceWorker' in navigator) navigator.serviceWorker.register('/offline.js', {scope: '/'})</script></head><body><div id=•menuHover></div><menu id=•menu style=display:none><li id=•menuCloseLi><a id=•menuClose class=•menuIcon aria-label="Close Menu" href=#><div class=•icon><svg><use href=/-68DEF225-/icons.svg#menu></use></svg></div></a><li id=•navUpLi><a id=•navUp class=•menuIcon aria-label="Parent Page: Fixed Station Lightning Arrestors" href=/operations/equipment/antenna/lightning><div class=•icon><svg><use href=/-68DEF225-/icons.svg#chevron-up></use></svg></div></a><li id=•navLeftLi><a id=•navLeft class=•menuIcon aria-label="Previous Page: DC-Grounded Antennas" href=/operations/equipment/antenna/lightning/dc-grounded><div class=•icon><svg><use href=/-68DEF225-/icons.svg#chevron-left></use></svg></div></a><li id=•navRightLi><a id=•navRight class=•menuIcon aria-label="Next Page: References" href=/operations/equipment/antenna/lightning/references><div class=•icon><svg><use href=/-68DEF225-/icons.svg#chevron-right></use></svg></div></a><li class=•tile><a href="/"><div class=•icon><svg><use href=/-68DEF225-/icons.svg#home></use></svg></div><div class=•tileText><div class=•tileTitle>Home Page</div></div></a><li class=•tile><a href=/activities/events.php><div class=•icon><svg><use href=/-68DEF225-/icons.svg#calendar></use></svg></div><div class=•tileText><div class=•tileTitle>Calendar &amp; Signups</div></div></a><li class=•tile><a href=/training><div class=•icon><svg><use href=/-68DEF225-/icons.svg#presenter></use></svg></div><div class=•tileText><div class=•tileTitle>Training &amp; Practice</div></div></a><li class=•tile><a href=/operations><div class=•icon><svg><use href=/-68DEF225-/icons.svg#radio></use></svg></div><div class=•tileText><div class=•tileTitle>Operations</div></div></a><li class=•tile><a href=/credentials><div class=•icon><svg><use href=/-68DEF225-/icons.svg#award></use></svg></div><div class=•tileText><div class=•tileTitle>Credentials</div></div></a><li class=•tile><a href=/about><div class=•icon><svg><use href=/-68DEF225-/icons.svg#info></use></svg></div><div class=•tileText><div class=•tileTitle>About SCCo ARES/RACES</div></div></a><li class=•tile><a href=/services><div class=•icon><svg><use href=/-68DEF225-/icons.svg#checklist></use></svg></div><div class=•tileText><div class=•tileTitle>Services We Provide</div></div></a><li class=•tile><a href=/reference><div class=•icon><svg><use href=/-68DEF225-/icons.svg#books></use></svg></div><div class=•tileText><div class=•tileTitle>Reference Information</div></div></a><li class=•tile><a href=/sitemap><div class=•icon><svg><use href=/-68DEF225-/icons.svg#sitemap></use></svg></div><div class=•tileText><div class=•tileTitle>Site Map</div></div></a></menu><div id=•offlineWarn>No connection to server.  Showing local offline copy of page.</div><header id=•banner><a id=•menuOpen aria-label="Open Menu" href=#><div class=•icon><svg><use href=/-68DEF225-/icons.svg#menu></use></svg></div></a><div class=•bannerStripe></div><div id=•bannerMiddle><img id=•bannerLogo alt="Santa Clara County Seal" src=/-67DB4F6F-/county-seal.svg><div id=•bannerTitle>Santa Clara County
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  Lightning arrestors won’t work unless they are connected to a properly installed ground system.
  Lightning arrestors should be placed in the coax as close to where the cable enters the building as possible.
  Typically, a ground bus bar exists inside the building, at the cable entry point.
  The coaxial cable coming into the building from the outside should be terminated at that point just inside the building and connected to a lightning arrestor which is grounded to the bus bar.
  The cable can then continue to the equipment rack.
<p class=•pad>
  Ground wires must be low impedance to provide the best possible path to ground.
  Use at least #6 AWG wire.
  #2 AWG is even better.
  Copper strap is best.
  Keep the length as short as possible.
  Minimize the number of bends.
  Where bends are necessary, keep bends to a minimum radius of 8 inches.
<p class=•pad>
  Ensure that the single point ground for your equipment is also bonded to the cable entrance bus bar and the building electrical ground.
  Establishing a proper ground system for your home or building is beyond the scope of this web page.
  See the
  <a href=references>references</a>
  for detail.
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