"kbOnes, I'm curious about your ground comment."
Matt,
The issue stems from the resistance and inductance the long network cables have, not to mention the the resistance and inductance of all the ground wires in your home. A ground is not a ground if there is any appreciable distance involved if you are dealing with a fast rising impulse. You can think of it as the wires are basically the secondary of a transformer. If there is a decent nearby lightning hit there is a large electro magnetic pulse and as the field collapses it induces a current into all the wiring.
As an example a while back we had a good thunderstorm passing overhead. There was a lot of cloud-to-cloud lightening in the area. I had a 7Mhz wire antenna run across the back of my home that consisted of 66 feet of 12 ga wire. There was a coaxial cable that came down into my room which I had disconnected because of the storm. I heard some strange "snaps" which turned out to be electricity arcing across the conductors in the coax connector!! I would guess that the break down voltage was around 20,000. This voltage was induced by the local storm, but keep in mind unlike other home wiring there was nothing in this antenna to shunt the voltage and it did build up over time.
The problem I'm concerned with comes when you have multiple connection points into a system, this opens the door for dis-similar voltage potentials to allow currents to run roughshod through the electronics. Ideally all all your wiring is on the upside of a good AC power impulse supressor/UPS which has a solid ground. If you have any other wires going to the computer (phone, network, cable or audio etc) they should be passed through an impulse supressor connected to the same local point. This means all the interconnects are protected to a common ground which may have its voltage potential jump up from that of other grounds in the home if there were an impulse. I posted a photo on the other recent thread discussing lightning protection. In that picture you can see the steel of the outlet strip was vaporized but all the gear in the rack plugged into it was fine!
Note I don't wish to make everyone think that a wired network will cause problems, its just that wireless isolates the systems in the home. I have an extreme situation here because I have some large aluminum rods sticking up in the sky (my amateur radio antennas). I have never had a direct hit, so I knock on wood. But I do my system engineering quite differently as a result. I have seen a number of friends take strikes, often to near by trees, and the damage has been daunting.
My apologies from straying from the ATSC television thread. I now return you to your regularly scheduled programming
