NEBS-compliant earth connection

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 Lenovo Storage V series enclosures, this connection is made by using the front enclosure mounting screws that are part of the standard installation described in Installing support rails for Lenovo Storage V series systems and Installing enclosures for Lenovo Storage V series systems. 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 Lenovo Storage V series system is required to be NEBS-compliant, some system configuration settings must be made. For details, see Configuring a Lenovo Storage V series system to be NEBS-compliant.
For more information about Lenovo Storage V series configuration guidelines and restrictions, see the following website: 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.