Why whole house surge protectors are not enough


TL;DR:

One measure of a surge protector is the clamping voltage. That is, at what voltage does the surge protector actually start to work. Whole house surge protectors are limited to no less than ~ 600 Volts (instantaneous) between a leg and neutral or ground. That’s up to 1,200V if symmetrical.

The best surge protecting strips and conditioners clamp below 200 Volts.

Please keep this in mind when deciding whether or not to use surge protectors at your PC, stereo, TV, etc. in addition to a whole house unit.

I wrote more about this here:

 

https://inatinear.blogspot.com/2021/09/time-for-new-surge-suppression.html

No manufacturer of whole house surge protection claims that their devices alone are enough for sensitive electronics when you check the fine print.

erik_squires

Showing 1 response by emergingsoul

I need a new refrigerator and a lightning strike would be a great way to get rid of it and an excuse to buy a new one. I like the idea about a surge suppressor at the electric panel, don’t know at what point it triggers but it seems somewhat helpful.

quality Power switches with surge protection are a real smart thing to do for miscellaneous electrical av Devices. A better power conditioner to manage noise may have some value too

If you have a large electrical storm rolling through, probably a good idea to unplug your amplifiers and components.

I guess having them turned off while being plugged in still doesn’t protect them. Happily the refrigerator will remain on waiting for lightning to destroy it and then I get a new one. Yeah.