
Appendix C
Site Preparation
Distribution Hardware
105
Distribution Hardware
This section describes wire selection and the types of raceways (electrical conduits) used in the distribution
system.
Wire Selection
Use copper conductors instead of aluminum, as aluminum’s coefficient of expansion differs significantly from
that of other metals used in power hardware. Because of this difference, aluminum conductors can cause
connector hardware to work loose, overheat, and fail.
Raceway Systems (electrical conduits)
Raceways (electrical conduits) form part of the protective ground path for personnel and equipment.
Raceways protect the wiring from accidental damage and also provide a heatsink for the wires.
Any of the following types may be used:
•
Electrical metallic tubing (EMT) thin-wall tubing
•
Rigid (metal) conduit
•
Liquidtight with RFI strain relief (most commonly used with raised floors)
Building Distribution
All building feeders and branch circuitry should be in rigid metallic conduit with proper connectors (to
provide ground continuity) Conduit that is exposed and subject to damage should be constructed of rigid
galvanized steel.
Power Routing
Power drops and interface cables from the equipment are routed down from the power panel, through a
grommet protected opening (beneath the floor level), and under the floor panels.
Summary of Contents for rp7405
Page 6: ...Contents vi ...
Page 8: ...Tables viii ...
Page 11: ...Preface ...
Page 15: ...xi Figure 1 Declaration of Conformity ...
Page 22: ...xviii ...
Page 39: ...Chapter 2 17 2 Installation ...
Page 70: ...Chapter 2 Installation Booting HP UX using Boot Console Handler BCH 48 ...
Page 71: ...Chapter 3 49 3 Troubleshooting ...
Page 78: ...Chapter 3 Troubleshooting Common Installation Problems 56 ...
Page 79: ...Chapter 4 57 4 Removal and Replacement ...
Page 111: ...Appendix A 89 A Replaceable Parts ...
Page 122: ...Appendix B System Specifications Environmental Specifications 100 ...
Page 123: ...Appendix C 101 C Site Preparation ...