When the UPS switches to battery power, it _can_ cause a dip or a spike which the surge protector may react to. I believe each time they do this it degrades the unit until it fails completely.
I'm guilty of this too, but I've never had an issue with it. :) Thanks, Jeff Cain - [email protected]<mailto:[email protected]> Technical Support Analyst Sunbelt Software, part of the GFI Software family www.sunbeltsoftware.com<http://www.sunbeltsoftware.com/> Tel: 1-877-757-4094 Fax: +1 727-562-3402 From: Maglinger, Paul [mailto:[email protected]] Sent: Tuesday, August 03, 2010 1:31 PM To: NT System Admin Issues Subject: RE: Guilty, will change after reading this. Interesting, but isn't A/C power typically a sine wave? Or is it implying that the UPS generates a "special" sine wave that is different than what the utility company generates? 60Hz is the norm, is it not? Surge strips are typically no more than some metal oxide varistors placed across hot, neutral and ground. Some put torodial coils for noise reduction, but I don't know of anything in any of them that would damage the UPS or the surge strip. IMHO, I think the more accepted reason not to do it is because of the temptation to plug in more devices than the UPS is designed to handle, and thereby overload it. -Paul From: David Lum [mailto:[email protected]] Sent: Tuesday, August 03, 2010 12:01 PM To: NT System Admin Issues Subject: Guilty, will change after reading this. - do not plug surge protectors into a UPS. If they UPS runs on batteries it will usually generate a step sine wave which may destroy surge protectors (in particular tricky to find power strips without surge protector) http://isc.sans.edu/diary.html?storyid=9319 David Lum // SYSTEMS ENGINEER NORTHWEST EVALUATION ASSOCIATION (Desk) 971.222.1025 // (Cell) 503.267.9764 ... ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
