Lightning Storm Got Me

[westom]

Posted was protection understood by layman. You can do that yourself. Or just do the inspection and then have an electrician do it. For example, does the dish have a ground wire? Either go to any big box hardware store to buy that earth ground rod and wire. Or have an electrician install what the dish installer was supposed to install.

Anyone can answer this. "So what was the incoming and outgoing path via the LNB? One could be a direct strike to the dish. Through the LNB, through its coax cable, and then destructively via the receiver inside. ... Then the path from cloud to earth need not pass through the LNB."

Also quite simple. You assumed a protector and protection are same. "Protection is never provided by a protector. Effective protectors either connect that current ... to single point earth ground. Or a protector does not do protection."

Protection means your satellite dish enters at the service entrance. If not, the dish was installed defectively. "A hardwire from the coax to earth ground does best protection possible." Is the satellite dish coax wired to the same earth ground used by AC electric and telephone? Anyone (even a teenager) can make that critically important inspection.

Or report what you see (what exists) to learn more. Because your damage is directly traceable to a defectively installed dish system. Why did that current destructively use your LNB to connect to earth? An improper installation that might also violate human safety codes.

[Kraven]

Cute. The man had his gear blown.. but cute post nonetheless.

Cheers (not), K

[bigredneck]

In my post I said that i had trouble with the ku dish and removed the coax from the switch and hooked coax directly to BUD. Thus bypassing the ground which was grounding the Ku dish and the BUD. I stated that i failed to properly ground the coax after this "experiment" to see if the Ku dish was giving me a problem. So I am relatively sure that was my problem.
Before I unhooked the coax I did not have the ground tied into the electrical of the house where the receiver was located, I had it tied to a ground rod driven into the earth. Are you saying that it must be grounded to the electrical system that the receiver is plugged in to ?

I really do appreciate the help given to me on this site, I just think it can be done without a condescending attitude.

Have a Nice Day

[A to D]

Lightning also generates an extremely high broadband RF pulse. If a moderately close lightning bolt passes by or through through the aperture of the dish sufficient rf energy can be focused into the LNB, taking out its front end.

[westom]

Originally Posted by bigredneck

Are you saying that it must be grounded to the electrical system that the receiver is plugged in to ?

Wall receptacle safety ground ("where the receiver was located") is not earth ground. Earthing was defined such as "protector connects that current low impedance (ie 'less than 10 feet') to earth." That connection also must meet other important requirements such as "connect that current low impedance (ie wire not inside metallic conduit, no splices, no sharp bends, etc) to single point earth ground." Safety ground violates all requirements.

If grounded via safety ground, then a wall receptacle ground may simply make damage easier. Earth ground a surge; not the appliance. Safety ground is not earth ground.

Every wire inside every incoming cable must connect 'low impedance' to a single point earth ground at the service entrance. If any incoming wire is not earthed, then protection is compromised. All wires earthed by the same electrode - the single point earth ground.

Some "AC electric wires cannot be hardwired to earth. So we make that connection via a protector" A best and destructive path to earth may be via the receiver and its coax cable if an AC 'whole house' protector is not earthed

If lightning strikes the top of a dish. And connects to earth via a wire at the bottom. Then that current does not pass through and damage an LNB. Protection is about a path to earth that is low impedance (as short as possible. no sharp wire bends, no splices, etc), is separated from other wires, and connects to earth ground.