Sun Microsystems 15K/9960, Site Planning Manual

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13
C H A P T E R
4
Facility Power and Grounding
Requirements
This chapter contains the requirements for the facility power and the grounding
requirements for the Cluster Platform 15K/9960 system.
Facility Power Requirements
To prevent catastrophic failures, the design of your power system must ensure
that adequate power is provided to your Cluster Platform 15K/9960 system. Sun
suggests that all power circuits supplying power to the Cluster Platform 15K/9960
system be derived from dedicated electrical distribution panels. Electrical work and
installations must comply with applicable local, state, or national electrical codes.
Caution – System earth fault protection relies on the building circuit.
Sun makes every effort to minimize the effects of power failures and interruptions to
the hardware. The Cluster Platform 15K/9960 system has dual, redundant, current-
sharing power supply inputs and is designed to make use of two independent
power sources. However, 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. You must provide a stable power
source, such as an uninterruptible power system (UPS), to reduce the possibility of
component failures.
TABLE 4-1
lists the electrical specifications for the Cluster Platform 15K/9960 system.
For the power connections for the expansion cabinet, refer to the Sun StorEdge
Expansion Cabinet Installation and Service Manual. For the power connections for the