Specifications

Electrical Circuit and Wiring Information B-1
Appendix B
B-Electrical Circuit and
Wiring Information
You should provide electrical circuit and wiring information to the contractor and/or
facilities personnel responsible for wiring the power at the system installation site. The
information you need to provide includes:
 ‘‘Fault Protection Requirements’’ on page B-1
 ‘‘Grounding Considerations’’ on page B-1
 ‘‘Circuit Wiring Diagrams’’ on page B-2
 ‘‘Electrical Power Connectors’’ on page B-9
Fault Protection Requirements
Each enclosure in the ftServer V 100, V 200, or V 400 system contains fault/overload
current protection. However, the system relies on the power distribution system at your
site for protection against potential faults in the power cords and the wiring in the
system base.
 Use 30A or less circuit breakers in each power distribution branch feeding the
PDUs.
 To connect a single system to power, use 20A or less circuit breakers in each
power distribution branch feeding the systems.
Grounding Considerations
The system obtains an earth reference ground through the power cords attached to the
system. Similarly, each peripheral device connected to the system obtains ground
through its power cord. For each peripheral device, you must ensure that a
high-integrity safety-ground conductor is installed as part of the wiring system (in
accordance with U.S. national electric code NFPA 70 or the equivalent). The
international safety standard (EN60950) for electronic data processing (EDP)
equipment also requires a ground conductor, but calls it a protective earth (PE) ground.
Depending on local conditions, ground potentials may differ between the system base
and any peripheral devices connected to the system base. All grounds in the system