IBM RS/60000 Series Site And Hardware Planning Information page 111

from the same piece of building switch gear. Most facilities should be able to achieve this level of
redundancy.
Switch Gear
Single Distribution Panel - Dual Circuit Breakers: This configuration requires that the system receives
power from two separate circuit breakers in a single power panel. This configuration does not make full
use of the redundancy provided by the processor. It is, however, acceptable if a second power distribution
panel is not available.
Switch Gear
Additional Installation Considerations
In the United States, installation must be made in accordance with Article 645 of the National Electric
Code (NEC). In Canada, installation on a raised floor must be in accordance with Article 12-020 of the
Canadian Electrical Code (CEC).
Signal Integrity: System reliability can be adversely affected by the presence of transient electrical noise
that may be conducted on power, signal, and control cables. To conduct high-frequency-electrical noise
away from the system, the ground path must be as short as possible. All systems are provided with a
short ground strap that is intended for use with stringer/stanchion-type raised floors (or other grounded
types). This ground strap is required if your servers are connected to a 9076 SP Switch2 clustered
environment, and it is recommended for all other configurations.
Distribution
Panel
Distribution
Panel
Distribution
Panel
System
System
Chapter 2. Physical Characteristics of Systems
93