Let me start by saying that I have read through the massive 60+ page threads of people arguing about surge protection located in various subforums. I am aware that there is very little some people can agree on in this area.
Hopefully this is an appropriate forum for my question.
I have run a dedicated 20amp line from the breaker for my new home theater room. I have also installed a whole house surge protector at the service panel. My research and intuition leads me to believe I should "layer" the surge protection, so in addition to the whole house unit I am going to add protection to my 20 amp circuit.
I am looking to install a Surgex SX20ne http://www.surgex.com/products/sx20ne.html
on my 20amp line. The installation instructions do not provide a clear answer, so my question is this: should I locate the protector close to the service panel, or close to the equipment?
If placed at the service panel, the protector would be roughly 70 feet of 12/2 romex away from the equipment racks.
This NEMA article http://www.nemasurge.com/ins/i-installer.html
seems to generally indicate that protection should be added close to the service panel.
However, other sources all agree that the second layer of protection should be located as close to the equipment as possible. Since I already have protection at the panel, should I install my second layer of protection close to the equipment? This seems intuitively correct to me, because less wire length = less chance of interference with other lines, ect.
Any insight would be greatly appreciated.