HP Carrier-grade cc2300 Product Manual page 14

If DC power supplies are installed:
WARNING
Connection with a DC source should only be performed by trained service
personnel. The server with DC input is to be installed in a Restricted Access
Location in accordance with articles 110-16, 110-17, and 110-18 of the National
Electric Code, ANSI/NFPA 70. The DC source must be electrically isolated by double
or reinforced insulation from any hazardous AC source. The DC source must be
capable of providing up to 650 Watts of continuous power per feed pair.
Main DC power disconnect: You are responsible for installing a properly rated
DC power disconnect for the server system. This main disconnect must be readily
accessible, and it must be labeled as controlling power to the server. The circuit
breaker of a centralized DC power system may be used as a disconnect device when
easily accessible and should be rated no more than 10 amps.
Grounding the server: To avoid the potential for an electrical shock hazard, you
must reliably connect an earth grounding conductor to the server. The earth
grounding conductor must be a minimum 14AWG connected to the earth ground
stud(s) on the rear of the server. The safety ground conductor should be connected
to the chassis stud with a Listed closed two-hole crimp terminal with a maximum
width of 0.25 inch. The nuts on the chassis earth ground studs should be installed
with a 10 in/lbs torque. The safety ground conductor provides proper grounding
only for the server. You must provide additional, proper grounding for the rack and
other devices installed in it.
Overcurrent protection: Overcurrent protection circuit breakers must be provided
as part of each host equipment rack and must be incorporated in the field wiring
between the DC source and the server. The branch circuit protection shall be rated
minimum 75 VDC, 10A maximum per feed pair. If the DC power system for the
equipment rack is installed with more than 10 amperes of protection, you must
provide supplemental protection for the server. The overall current rating of a
server configured with two power supplies is 8 amperes.
WARNING Do not attempt to modify or use an AC power cord set that is not the exact type
required. You must use a power cord set that meets the following criteria:
1. Rating: For U.S./Canada cords must be UL Listed/CSA Certified type SJT, 18-3
AWG. For outside U.S./Canada cords must be flexible harmonized (<HAR>) or VDE
certified cord with 3 x 0.75 mm conductors rated 250 AC.
2. Connector, wall outlet end: Cords must be terminated in grounding-type male
plug designed for use in your region. The connector must have certification marks
showing certification by an agency acceptable in your region and for U.S. must be
Listed and rated 125% of overall current rating of the server.
3. Connector, server end: The connectors that plug into the AC receptacle on the
server must be an approved IEC 320, sheet C19, type female connector.
4. Cord length and flexibility: Cords must be less than 4.5 meters (14.76 feet) long.
14 Chapter 1