When you install enclosures into a Network Equipment-Building
System (NEBS) compliant installation, each enclosure must have a reliable
electrical earth connection that is separate to any earth connections
provided by power supply cables.
On
system enclosures, this connection is made by using
the front enclosure mounting screws that are part of the standard
installation described in
Installing the support rails and
Installing the enclosures. To provide a reliable electrical
earth connection, the upright mounting rails of the racks into which
enclosures are installed must meet the following requirements before
installing the support rails and enclosures:
- Upright mounting rails must not be painted, oxidized or otherwise
insulated from the enclosure flanges and mounting rails. If paint,
oxidization or other insulation is present, it must be removed and
the metal must be brought to a bright, non-corroding finish.
- Upright mounting rails must have their own NEBS-compliant connection
to earth, independent of the earth connections provided by any power
supply cables.
Notes:
- If the system is required to be NEBS-compliant, some system configuration
settings must be made. For details, see Configuring a system to be NEBS-compliant.
- For more information about system
configuration guidelines and restrictions, see the following Web site: https://support.lenovo.com/us/en/solutions/ht505190
- If a Lenovo Storage V series system is clustered with a Lenovo Storage V series system,
NEBS compliance cannot be enabled. NEBS compliance is not supported
on Lenovo Storage V series systems.