When my home was built in 1991, I built a grounding array within 4-feet of the service entrance meter and panel. It consists of three,
5/8-inch, copper-clad, 8-foot ground rods. They are placed in a "goal post" configuration with the two verticals about 7-feet apart and one crossing the top of them, perhaps 6-inches below the tops of the rods. There is probably a 18-inches of earth cover. All components are bonded together with two, #6 solid copper wires and two make the final run to the meter box.Given midwest weather, I am confident that we have had plenty of transient spikes in the intervening years but I have experienced no (apparent) damage.
During this time, my computer system has been ostensibly protected by a strip-type surge suppressor:
I recently installed an Intermatic (whole-house) surge suppressor.
I have been following the Intermatic thread with some interest. Admittedly, it got a bit "deep" when the engineers began debating. Still, I gathered much good information, not the least of which was that MOV (metal oxide varistor) surge suppressors "wear out" over time - that their efficacy diminishes with each surge.
Is it time to replace my strip-type suppressor? The LEDs indicate nominal operation and protection, for whatever that's worth. TIA.