I think, aside from lightning strikes, these surge protectors pay for themselves during windstorm or icing events, where trees fall on the powerlines and cause "false trips", where the utility's circuit breakers trip and automatically reset several times before finally staying out. In the last two years I have had two of these protectors installed on panels at jobs that I have done, and the one in particular, has almost eliminated false burglar/fire alarm signals. I've wondered, considering how effective they are, why they are not a mandatory code requirement.
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