Lenovo System x3550 M4 - Page 269

•Powersupply1isthedefault/primarypowersupply.Ifpowersupply1fails,youmustreplacethepower
supplywiththesamewattageimmediately.
•Youcanorderanoptionalpowersupplyforredundancy.
•Thesepowersuppliesaredesignedforparalleloperation.Intheeventofapower-supplyfailure,the
redundantpowersupplycontinuestopowerthesystem.Theserversupportsamaximumoftwo
powersupplies.
Regulations
•Itisthecustomer'sresponsibilitytosupplythenecessarypowercable.Toreducetheriskofelectric
shockorenergyhazards:
–Useacircuitbreakerthatisratedat25amps.
–Use2.5mm
2
(12AWG)at90°Ccopperwire.
–Torquethewiring-terminalscrewsto0.50~0.60newton-meters(4.43~5.31inch-pounds).
Formoreinformation,see“Statement34”onpage257.
•Ifthepowersourcerequiresringterminals,youmustuseacrimpingtooltoinstalltheringterminalsto
thepowercordwires.TheringterminalsmustbeULapprovedandmustaccommodatethewirethatis
describedintheabove-mentionednote.
Statement29
CAUTION:
Thisequipmentisdesignedtopermittheconnectionoftheearthedconductorofthedcsupply
circuittotheearthingconductorattheequipment.
Thisequipmentisdesignedtopermittheconnectionoftheearthedconductorofthedcsupplycircuittothe
earthingconductorattheequipment.Ifthisconnectionismade,allofthefollowingconditionsmustbemet:
•Thisequipmentshallbeconnecteddirectlytothedcsupplysystemearthingelectrodeconductorortoa
bondingjumperfromanearthingterminalbarorbustowhichthedcsupplysystemearthingelectrode
conductorisconnected.
•Thisequipmentshallbelocatedinthesameimmediatearea(suchas,adjacentcabinets)asanyother
equipmentthathasaconnectionbetweentheearthedconductorofthesamedcsupplycircuitandthe
earthingconductor,andalsothepointofearthingofthedcsystem.Thedcsystemshallnotbeearthed
elsewhere.
•Thedcsupplysourceshallbelocatedwithinthesamepremisesasthisequipment.
•Switchingordisconnectingdevicesshallnotbeintheearthedcircuitconductorbetweenthedcsource
andthepointofconnectionoftheearthingelectrodeconductor.
Statement31
Chapter6.Removingandreplacingcomponents255