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How many HEPD80 protection devices are needed for (qty 2) 200A load centers in my home?
Home Surge Protective Device, Surgelogic
Surgelogic products, United States
Specifications needed for protection of 2 load centers in home
If the panels have individual feeds then you will need two separate units. If they are mounted side by side and one panel has a breaker feeding the other panel - sub fed or thru feed - you can put the SPD in the first panel and it should provide protection to the second panel.