UPS and/or surge suppressors plugged in series

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yankj said:
Is there any advantage in plugging UPS or surge suppressors into each other? Will it increase surge protection or run time?
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What kind of advantage are you looking for?

Some UPS are always online. There is considerable isolation from line to load 100% of the time.

Other UPS only come online when the power fails so brief transients have no trouble getting through.

Many UPS have built in surge suppression, so it would be redundant to plug the surge suppressor into the UPS.

Plugging the UPS into a surge suppressor might provide some protection to the UPS, but UPS are generally quite robust to begin with, so you may not gain all that much.
 
Having been hit HARD twice by lightning, I am a firm beliver in layers of protection. I have had the first layer go more than once but the rest was OK. Yes, UPS are good protection, but have lost at least one before I went to layered protection. Had coax, telephone, and CAT5 fail in the wall, etc., TV's, VCR's, computers, security system, printers (via ethernet), telephones, you name it!!! All the strikes that took out equipment were to trees.

Protect EVERYTHING!!! Coax, telephone, power, CAT5, etc. I have had failures on each at one time or another. I now have all of them with multiple layers of protection. So far with the additional layers I have not had any issues . . . but if lightining can make it down to earth, it can go through anything it wants! I just try to give it as many paths around my equipment as possible.

RC
 
Thanks guys. A reply I received from APC says they do NOT recommend daisy chaining UPS or surge suppressors. You get no additional runtime or protection. The first unit will handle it all. That is according to APC.
 
yankj said:
Thanks guys. A reply I received from APC says they do NOT recommend daisy chaining UPS or surge suppressors. You get no additional runtime or protection. The first unit will handle it all. That is according to APC.
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I am inclined to agree. A transient with enough energy to damage a typical UPS is not going to be deterred by your average plug in surge suppressor.
 
Keep in mind that most small APC UPS's are line-interactive, not double conversion -- so the load is not completely segregated from the line. Maybe they're saying that the surge protection they have on the front end can handle it, but it's not complete isolation from transients.
 
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