IBM System x3500 Installation And User Manual page 17

CAUTION:
Hazardous energy present. Voltages with hazardous energy might cause
heating when shorted with metal, which might result in splattered metall,
burns, or both.
Attention: This server is suitable for use on an IT power distribution system
whose maximum phase-to-phase voltage is 240 V under any distribution fault
condition.
xv
Safety