Nebs Gr-1089 Installation Caution And Rules - Cisco UCS C240 M3 Service Note

NEBS GR-1089 Installation Caution and Rules

NEBS GR-1089 Installation Caution and Rules
The following information is derived from the NEBS GR-1089 specification, Electromagnetic
Compatibility and Electrical Safety—Generic Criteria for Network Telecommunications.
This content also appears in the
Servers.
Caution The intrabuilding ports (Ethernet and serial) of the equipment or subassembly is suitable for connection
to intrabuilding or unexposed wiring or cabling only. The intrabuilding ports of the equipment or
subassembly must not be metallically connected to interfaces that connect to the outside plant (OSP) or
its wiring. These interfaces are designed for use as intrabuilding interfaces only (Type 2 or Type 4 ports
as described in GR-1089-CORE) and require isolation from the exposed OSP cabling. The addition of
primary protectors is not sufficient protection in order to connect these interfaces metallically to OSP
wiring.
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Cisco UCS C240 M3 NEBS Server Service Note
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The Cisco Unified Computing System (UCS) has AC power ports that are intended for deployments
where an external Surge Protective Device (SPD) is utilized at the AC power service equipment (see
the definition in National Electric Code).
The Cisco UCS is designed for a Common Bonding Network (CBN) installation.
The Cisco UCS can be installed in network telecommunication facilities or locations where the
National Electric Code applies.
An electrical conducting path shall exist between the product chassis and the metal surface of the
enclosure or rack in which it is mounted or to a grounding conductor. Electrical continuity shall be
provided by using thread-forming type mounting screws that remove any paint or nonconductive
coatings and establish a metal-to-metal contact. Any paint or other nonconductive coatings shall be
removed on the surfaces between the mounting hardware and the enclosure or rack. The surfaces
shall be cleaned and an antioxidant applied before installation.
The DC return connection to this system should remain isolated from the system frame and chassis
(DC-I).
The nominal DC operating voltage is –48 VDC.
The intrabuilding RJ-45 Ethernet ports of the equipment or subassembly must use shielded
intrabuilding cabling or wiring that is grounded at both ends.
Regulatory Compliance and Safety Information For Cisco UCS C-Series
OL-28629-01