I just bought a new Belkin Surge Suppressor rated at 3180 joules. I know this rating is pretty high. I also know that surge suppressors can wear out over time or will go completely if they take a "hit". My question is: Will the rating of 3180 get smaller over time if it takes little hits? In other words, if it absorbs 1000 joules will I still have protection of 2180 joules. Forgive my naivety in this matter. I'm not an electrical engineer.
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