Re: UPS configuration!

From: Jim Behning SBS MVP (jimbehingmvp_at_mindspring.com)
Date: 03/04/05


Date: Fri, 04 Mar 2005 14:36:28 GMT

It may be possible that the electician is arguing that the earth
ground is missing when you unplug the ups from the wall. When you flip
the switch on a surge protector, all you are doing is breaking the
mains or hot leg, but not the earth ground. If you still have the
earth ground when you present your server with that high static charge
from you synthetic carpet, the earth ground might carry the energy
away without harm. With no earth ground that energy might jump in to
server components. I think the correct terms are gounded and grounding
in the US electric code but I can never remember which one white is
and which one green is. Neutral (white) is a misnomer.

"Matt Gibson" <mattg@blueedgetech.ca> wrote:

>While he's right, the server will see no difference between you pulling the
>plug, or you tripping the breaker.
>
>It's not important, nor will data corruption occur.
>
>The Output side is isolated from the input side.
>
>Matt Gibson - GSEC
>
>"Rick F" <rick.REMOVE@rdfts.REMOVE.com> wrote in message
>news:eLqJqkGIFHA.1392@TK2MSFTNGP10.phx.gbl...
>> Pulling the plug is done by probably most individuals. But I was talking
>> to a electrician once and he said that is not a good thing to do. You
>> should plug the UPS into a power strip and flip it off or trip the breaker
>> for that outlet. He said if you pull the plug then there is no reference
>> to ground. If you leave it plugged in but kill the AC, then it is still
>> grounded. I am no electrician but he made it seem that it was important
>> and could be possible to cause data corruption. Ever since that
>> converstation, I don't pull the plug. Figure it is better to be on the
>> safer approach then not.
>>
>> --
>> Rick Faria - MCSE / A+
>> RDF Technical Services - www.rdfts.com
>> Email: support at rdfts dot com
>>
>>
>> "Jeff Teel" <jdteel@sugardog.com> wrote in message
>> news:uByblRGIFHA.2752@TK2MSFTNGP12.phx.gbl...
>>>I have looked over the posts on how different ones have set their backup
>>>devices. After seeing the settings on my UPS I have a question about an
>>>area that I haven't seen anyone discuss. I have an APC Smart-UPS 1500 with
>>>one server attached to it. There is also a monitor but it will be off
>>>99.9% of the time so it should be a non factor.
>>>
>>> When looking at the Risk Assessment screen of the PowerChute software it
>>> has a yellow warning icon beside the Application Shutdown category with
>>> my server name under it. The remainder of the tests that were done all
>>> had green check marks beside them. The warning seems to be pointing to
>>> Shutdown Sequence under the Shutdown category. What should the shutdown
>>> delay and sequence be set at and how would you describe each of the two
>>> settings?
>>>
>>> I've read some posts that mention to do allot of testing before leaving
>>> the UPS on it's own. Would simply unplugging the UPS from the socket
>>> simulate a power failure or is there another way to test the settings
>>> that have been made?
>>>
>>> Thanks To All
>>> Jeff
>>>
>>
>>
>

Jim B. SBS MVP



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