Cisco UCS C220 M4 Maintaining The Server page 66

Installing or Replacing Server Components
Figure 3-33
1
2
Installation Grounding
AC power supplies have internal grounding and so no additional grounding is required when the
supported AC power cords are used.
When using a DC power supply, additional grounding of the server chassis to the earth ground of the
rack is available. A screw hole for use with your grounding lug and grounding wire are supplied on the
chassis rear panel.
The grounding point on the chassis is sized for a single #10-32 screw. A lock-washer is required to secure
Note
the lug to the chassis. You must provide your own screw with lock-washer, grounding lug, and grounding
wire. The grounding lug must be a single-hole lug that fits a #10-32 screw and 14 AWG wire. The
grounding cable that you provide must be 14 AWG (2 mm), minimum 60° C wire, or as permitted by the
local code.
See
Cisco UCS C220 M4 Server Installation and Service Guide
3-66
1050 W, –48 VDC Power Supply and Cable
Keyed cable connector
(CAB-48DC-40A-8AWG)
Keyed DC input socket
Figure 3-32 for the location of the grounding lug screw-hole on the chassis rear panel.
1
3 PSU status LED
See Rear Panel LEDs and Buttons, page 3-5
Chapter 3 Maintaining the Server
2 3
1050W DC
+ DC
- DC
for details.
OL-32473-01