MOV style surge protectors wear out the fastest:
http://en.wikipedia.org/wiki/Surge_protector

On Mon, Mar 8, 2010 at 8:37 AM, Rick Glazier <[email protected]> wrote:
> Sorry for the delay.
> Constantly hitting a Surge Protector with surges WILL "use it up".
> Most are sacrificial devices. Each "hit" grinds down what it will do "next
> time".
> And the better ones come with lights to tell you when they "are gone"...
>
> If at all possible, this should be handled another way, maybe like a
> different
> circuit to isolate the surge farther "downstream" from the protector or
> computer.
>
> I'm assuming they were plugged into the same wall outlet or something?
>
> Rick Glazier
>
> From: "Hunter, Gary" February 18, 2010 10:30 PM
>>
>> Thanks for the advice Duncan.
>
>> Got my new surge protectors delivered today and guess what. When the
>> Laser printer kicks in the PC no longer turns off :) So I guess the
>> surge protection on the old UPS is not up to scratch :-)
>
>

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