Quote:
Originally Posted by elevatorman
I was told they would replace it free for ten years if you purchased it and it was shot.
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A minimally sized 'whole house' protector starts at 50,000 amps. because the typical lightning strike is 20,000 amps. Effective protectors are sized and installed so that even direct lightning strikes (and lesser surges) cause no damage. No damage even to the protector.
Protectors inside the house do not claim to provide that protection. Are often grossly undersized to fail on surges too tiny to harm appliances. If they fail, naive consumers will recommend them.
A properly sized 'whole house' protector should remain functional for decades.
Damage occurs when lightning connects a cloud destructively to earth. So that lightning does not conduct destructively through wooden structures, we connect that current to earth via a properly earthed lightning rod. So that lightning does not conduct destructively through household appliances, we connect that current to earth via a properly earthed 'whole house' protector.