Facility Power Requirements And Characteristics - Oracle SPARC Enterprise M4000 Installation Manual

2.2.1.1

Facility Power Requirements and Characteristics

For proper redundancy your facility should have two independent power sources:
Either circuit breakers connected to separate power company utility feeds or UPS
(uninterruptible power system). For power redundancy the power cords should not
be connected to the same facility power source.
If the computer equipment is subjected to repeated power interruptions and
fluctuations, it is susceptible to a higher component failure rate than it would be with
a stable power source. There are two basic configurations:
Power Cords With Redundant PSU Connection (
■
Power Cords With Dual-power Feed Connection (
■
Note – If more than one power cord of this server is connected directly to the same
facility power source distribution panel, connect the power cords to outlets
independently using one cable per power feed.
Caution – Ensure that the circuit breaker is off when installing or removing AC
power cords in order to avoid damage to the PSU or system.
SPARC Enterprise M4000 Server With Redundant PSU Connection
FIGURE 2-1
2-4 SPARC Enterprise M4000/M5000 Servers Installation Guide • February 2012
#1 #0
and
FIGURE 2-1
and
FIGURE 2-3
PSU#0 PSU#1
Circuit
breaker
)
FIGURE 2-2
)
FIGURE 2-4