Table of Contents
Advertisement
Grounding a Switch Chassis
a) Ensure that the power supply is turned off by making sure that the power switch is set to 0.
b) Connect the power cable that shipped with the power supply to the AC power source.
c) Connect the other end of the power cable to the power supply outlet.
What to Do Next
After the chassis is secured to the rack, you can ground the switch (see
32).
Grounding a Switch Chassis
The switch is fully grounded as soon as you connect the chassis and the power supplies to the earth ground
in the following ways:
• You connect the chassis to either a fully-bonded, grounded rack or to the data center ground.
• You connect the AC and HVAC/HVDC power supplies to the earth ground automatically when you
Before You Begin
Before you can ground the chassis, you must have a connection to the earth ground for the data center building.
If you installed the switch chassis into a bonded rack (see the rack manufacturer's instructions for more
information) that now has a connection to the data center earth ground, you can ground the chassis by connecting
its grounding pad to the rack. Otherwise, you must connect the chassis grounding pad directly to the data
center ground.
To connect the switch chassis to the data center ground, you need the following tools and materials:
• Grounding lug—A two-holed standard barrel lug that supports up to 6 AWG wire. This lug is supplied
• Grounding screws—Two M4 x 8 mm (metric) pan-head screws. These screws are shipped with the
• Grounding wire—Not supplied with the accessory kit. This wire should be sized to meet local and
• Number 1 manual Phillips-head torque screwdriver.
• Crimping tool to crimp the grounding wire to the grounding lug.
Cisco Nexus 7718 Switch Site Preparation and Hardware Installation Guide
32
Note
The system ground, also referred to as the network equipment building system (NEBS)
ground, provides additional grounding for EMI shielding requirements and for the
low-voltage supplies (DC-DC converters) on the modules. This grounding system is
active even when the AC and HVAC/HVDC power cables are not connected to the
system.
connect an AC or HVAC/HVDC power supply to an AC or HVAC/HVDC power source.
with the accessory kit.
accessory kit.
national installation requirements. Depending on the power supply and system, a 12 AWG to 6 AWG
copper conductor is required for U.S. installations. We recommend that you use commercially available
6 AWG wire. The length of the grounding wire depends on the proximity of the switch to proper grounding
facilities.
Installing the Chassis
Grounding a Switch Chassis, on page
OL-30453-01
Advertisement
Table of Contents
