Last I checked, PDUs are not sold by watts, but by volts/amps. Joe
On Wed, May 5, 2021 at 5:52 AM Wayne Bickerdike <[email protected]> wrote: > Amps are not power. Watts are. > > On Wed, May 5, 2021, 20:08 Joe Monk <[email protected]> wrote: > > > Yes. Take the value in watts of each power supply. Divide watts by volts > > to get amps. Then just add up the amps. > > > > Example: I have a rack of 12 servers. Each server has 2 770w power > > supplies. My voltage is 208vac. > > > > 770w / 208 vac = 3.7 amps. So each power supply can draw a MAX of 3.7 > amps. > > > > 3.7 A * 24 = 88 amps MAX if each power supply were drawing full current. > > > > BUT - two power supplies presumes load sharing. So each power supply is > > only drawing half-current. Thus, the MAX consumption can be 44 (12 * > 3.7) > > amps at 208 vac for the full rack. > > > > Joe > > > > > > > > > > On Wed, May 5, 2021, 01:26 Peter <[email protected]> wrote: > > > > > Hello > > > > > > Apology for posting a non mainframe questions here . > > > > > > Is there a way to determine the total power consumption of rack with > 12u > > as > > > form factor ? > > > > > > I am sure some of them would have used a benchmark to design a solution > > for > > > any new server coming inside the data center floor. > > > > > > So any clue or your experience would help me to analyse further. > > > > > > Peter > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
