ok...smart folks... You have a 200Watt (as rated by the manufacture) powersupply for your computer. UPS's come in various sizes, say a 3KVa, so thats 3000 VA of power. But its rated for pure resistive circuits. Backed off for a power factor correction of .7 roughly, you get 2000 watts of power avaiable to your devices. Now, do you account for the power factor for the power supply against the 2000 watts? ie...200 watts is PF corrected to around 280 watts. So does that mean that you can hook up only 7 computers? Or do you use the non PF of 200 watts and lets you hook up 10 computers. Or do you use the PF of 280 against the non corrected UPS value of 3000 watts? None of them seem to add up the same. I believe that you use the PF of the UPS and the non PF of the power supply? Need to figure this out rather soon. thanks a bunch _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu