|> I appreciate you letting me know the number for the joules to look for. There were a few that|
> said they have 800 joules.
So an 800 joules protector will absorb surges that are hundreds of thousands of joules? It is near zero protection. Just enough above zero so that advertising (and others who do not ask damning questions) will hype it as 100% protection.
Even 100 years ago, protectors were properly earthed so that even direct lightning strikes did not cause harm. The difference between power strip protector promoted by hearsay and well proven effective protectors (that also costs less money) is defined by the NIST (US government research agency):
> You cannot really suppress a surge altogether, nor "arrest" it. What these protective
> devices do is neither suppress nor arrest a surge, but simply divert it to ground,
> where it can do no harm.
A surge too small to harm protection already inside appliances may damage that grossly undersized protector. Then retail rumors claim that protector did the protection. Nonsense. Any protector that fails does no protection. Surges too small to damage anything but the ineffective protector get the naive to recommend it.
Meanwhile, a 'whole house' protector from so many responsible companies means no surge energy is even inside the building. Why does your telco not shut down phone service with each approaching storm? They waste no money on power strip protectors. They earth 'whole house' protectors. Connected to overhead wires all over town, your telco suffers about 100 surges with each storm. And no damage.
You do same with products from Intermatic, Leviton, Square D, General Electric, ABB, or Siemens. Or that one protector from Cutler-Hammer is purchased in Lowes or Home Depot for less than $50.
Protectors go bad. One 'whole house' protector may only degrade decades later. But protectors intentionally undersized will fail as fast as possible. After all, its 800 joules must somehow absorb hundreds of thousands of joules.
Read its manufacturer specs. Good luck. Nobody will quote numbers for protection ... because even the manufacturer does not claim that surge protection.
Take a $3 power strip. Include some ten cent protector parts. Sell it for $25 or $150. It is a profit center. Buy the same protector circuit in a grocery store for maybe $7. Or read numbers for a UPS. UPS protection numbers are often smaller. And just enough above zero so that advertising can claim 100% protection. Yes, worry about the word scam.
Direct lightning strikes are typically 20,000 amps. So a minimally sized 'whole house' protector is 50,000 amps. Because a protector must protect from all surges - and remain functional. Numbers that power strip protectors will avoid. Professionals even 100 years ago, instead, were earthing a 'whole house' protector so that no surges cause damage. You find that same protectors in every telco switching center everywhere in the world. That is also what every informed homeowner installs.