Site Preparation Guide, Eighth Edition - Superdome HP 9000 Systems

Appendix E
Superdome Configurations
105
b. An input power source supplied from a 3-pole plus protective earth (PE), 4-wire system will always
be wired as 240 volts phase-to-phase, no neutral or common, plus a PE ground. Three phase input
voltage (240VAC) to the equipment is connected phase-to-phase. Examples of 4 wire: 200-volt
phase-to-phase, 208-volt phase-to-phase, 240-volt phase-to-phase
c. An input power source supplied from a 4-pole +PE, 5 wire system may be wired as either:
208VAC phase-to-phase voltage with a common, plus a PE ground. Three phase input voltage
(208VAC) to the equipment is connected phase-to-phase. The common is not connected to the
PDCA neutral terminal.
415VAC phase-to-phase voltage with a neutral return, plus a PE ground. Three phase input voltage
(230-240VAC) to the equipment is connected phase-to-neutral. The neutral is connected to the
PDCA neutral terminal. Examples of 5 wire: 208-volt phase-to-phase, 380-volt phase-to-phase,
415-volt phase-to-phase