HP BladeSystem c7000 Carrier-Grade Enclosure Maintenance and Service Guide

A Alternate-Sized site cables
This appendix provides information for customers who plan to use alternate-sized site power input
cables and lugs to connect site power. The alternate-sized cables and lugs must be provided by
the customer or the installation provider for the customer. HP does not provide these items to the
customer.
IMPORTANT: The power cables should be assembled by a certified electrician only.
Required documentation
The information in this appendix assumes the customer or the customer’s installation provider is
already familiar with and has access to the National Fire Protection Associations (NFPAs) published
National Electrical Code Handbook 2005 (NFPA 70). Specifically either of these tables from the
handbook, depending on the environment at the site:
• “Allowable Ampacities of Insulated Conductors Rated 0 Through 2000 Volts, 60° C Through
90° C, Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth,
Based on Ambient Temperature of 30° C” (Table 310.16)
• “Allowable Ampacities of Insulated Conductors Rated 0 Through 2000 Volts, 150° C Through
250° C (302° F Through 482° F). Not More Than Three Current-Carrying Conductors in
Raceway, Cable, or Earth, Based on Ambient Temperature of 40° C (104° F)” (Table 310.18)
Recommended site power cables
To connect site power, based on a typical NEBS environment, HP recommends using 4 AWG-sized
cable with these or better characteristics:
• 75°C rated cable
• Copper-clad aluminum construction
• 40°C correction factor
HP supplies 4 AWG lugs to use with the recommended cable.
Recommended grounding cables
To ground the rack, based on a typical NEBS environment, HP recommends using 4/0 AWG-sized
cable with these or better characteristics:
• 75°C rated cable
• Copper-clad aluminum construction
• 40°C correction factor
HP supplies 4/0 AWG lugs to use with the recommended cable.
Requirements for using alternate-sized site power or ground cables
If you plan to use alternate-sized site power input cables to connect site power, you must ensure
the cables meet the ampacity requirements for a NEBS 40°C environment.
CAUTION: You must use Table 310.16 or Table 310.18 (see “Required documentation”
(page 30)) to verify the alternate sized site power input cables meet the ampacity requirements for
a NEBS 40°C environment.
30 Alternate-Sized site cables