With all the numbers being used, I'll just say that my rule-of-thumb is 4 systems (max) per 20A circuit, including the monitors. I have been using this for years and never had a problem. I normally try to have only 3 systems if possible though. I have absolutely no idea why Dell would quote 1 system. This is going to wreak havoc on older schools which have 1 20A per room in many cases. Perhaps a solution is to purchase some inexpensive UPS's and use them buffers between the PC and the circuit to handle spikes (power on for example). Sincerely, Dave Hopkins <div> On 3/14/07, <a href="mailto:Accessys@smart.net">Accessys@smart.net</a> <<a href="mailto:accessys@smart.net">accessys@smart.net</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> why not just pick up a $20 watt watcher meter that is plugged into the outlet and the load is plugged into it, then see exactly what you are using. some of the better ones can log usage. that way you can "Show" anyone just how little power you are using. you can use the excuse that "Dell was giving you information for full computers, we have most of the inards disconected and are using them as dumb terminals rather than full computers. see this is how much electric they are actually using" Bob ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ VISTA SOFTWARE, DESIGNED TO RESTRICT WHAT YOU CAN DO. <a href="http://www.badvista.org"> www.badvista.org</a> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ "They that can give up essential liberty to obtain a little temporary safety deserve Neither liberty nor safety", Benjamin Franklin - - - - - - - - - - - - - - - - - - - ASCII Ribbon Campaign. . . . . . . . . . . . accessBob .NO HTML/PDF/RTF/MIME in e-mail. . . . . . . <a href="mailto:accessys@smartnospam.net"> accessys@smartnospam.net</a> .NO MSWord docs in e-mail . . . .. . . . . . Access Systems, engineers .NO attachments in e-mail, .*LINUX powered*. access is a civil right *#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*# THIS message and any attachments are CONFIDENTIAL and may be privileged. They are intended ONLY for the individual or entity named _______________________________________________ K12OSN mailing list <a href="mailto:K12OSN@redhat.com"> K12OSN@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/k12osn">https://www.redhat.com/mailman/listinfo/k12osn</a> For more info see <<a href="http://www.k12os.org">http://www.k12os.org</a>> </blockquote></div>