Cisco UCS C220 M4

3-66
Cisco UCS C220 M4 Server Installation and Service Guide
OL-32473-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Figure 3-33 1050 W, –48 VDC Power Supply and Cable
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.
Note The grounding point on the chassis is sized for a single #10-32 screw. A lock-washer is required to secure
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 Figure 3-32 for the location of the grounding lug screw-hole on the chassis rear panel.
1 Keyed cable connector
(CAB-48DC-40A-8AWG)
3 PSU status LED
See Rear Panel LEDs and Buttons, page 3-5 for details.
2 Keyed DC input socket
305145
1 2 3
1050W DC
+
DC
-
DC