Kontron TIGW1U Carrier Grade Server - Manual (Page 90)

TIGW1U server—Safety Information
Kontron Carrier Grade Server TIGW1U
Product Guide, rev. 1.3 December 2009
90
provide proper grounding for the rack itself. If the server power cord is plugged into a
wall AC outlet, the safety ground conductor in the power cord provides proper
grounding only for the server. You must provide additional, proper grounding for the
rack and other devices installed in it. This system is intended for connection to a
Common Bonding Network (CBN) as defined by NEBS GR-1089.
Overcurrent protection: The server is designed for an AC line voltage source with up to
20 amperes of overcurrent protection per cord feed. If the power system for the
equipment rack is installed on a branch circuit with more than 20 amperes of
protection, you must provide supplemental protection for the server. The overall
current rating of a configured server is less than 6 amperes.
Warning: Do not attempt to modify or use an AC power cordset that is not the exact type
required. You must use a power cordset that meets the following criteria:
• Rating: In the U.S. and Canada, cords must be UL (Underwriters Laboratories, Inc.)
Listed/CSA (Canadian Standards Organization) Certified type SJT, 18-3 AWG
(American Wire Gauge). Outside of the U.S. and Canada, cords must be flexible
harmonized (<HAR>) or VDE (Verband Deutscher Electrotechniker, German
Institute of Electrical Engineers) certified cord with 3 x 0.75 mm conductors rated
250 VAC.
• 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.
• Connector, server end: The connectors that plug into the AC receptacle on the
server must be an approved IEC (International Electrotechnical Commission) 320,
sheet C13, type female connector.
• Cord length and flexibility: Cords must be less than 4.5 meters (14.8 feet) long.
A.2.2 If DC Power Supplies Are Installed
Connection with a DC (Direct Current) 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 110-26 and 110-27 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 300 watts of continuous power per feed pair.
Mains DC power disconnect: You are responsible for installing a properly rated DC
power disconnect for the server system. This mains disconnect must be readily
accessible, and it must be labeled as controlling power to the server. The UL Listed
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: This server is intended for installation with an isolated DC return
(DC-I) and is to be installed in a Common Bondng Network (CBN) per NEBS GR-1089.
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 having 5/8-inch pitch. The nuts on the chassis earth ground studs
should be installed with a 10 in-lb 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 UL Listed 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