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Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Chapter
Connecting Power for AC Systems
Repeat Steps 1 and 2 for any other shelves in the rack that are powered from the same power assembly.
Step 3 The AC power source is connected to the IEC receptacles on the rear of the power module. The power
assembly is available in two versions: one with a single AC power input and one with dual (redundant)
AC power inputs. The AC power cords should be plugged into a 200/240 VAC nominal, single phase,
dedicated wall outlet capable of supplying 15A. The facility circuit should be protected with a 20A
circuit breaker with long trip delay.
Step 4 Ground (green) wire of the AC power cord is connected to the MGX 8220 system for safety ground.
Make sure that the building AC receptacle is properly grounded.
Step 5 If the left power connector on an MGX 8220 shelf is not used, a cover must be installed in the empty
position to ensure proper cooling of the rear cards.
Warning
The power to the shelf is OFF at this point. DO NOT apply power until later.
Figure 7-14 AC Cabling for One-Shelf and Two-Shelf Racks
Main cooling
module
Plenum or spacer
AXIS shelf
Primary AC
source
Optional
secondary
AC source
Main cooling
module
Plenum or spacer
AXIS shelf
Primary AC
source
Optional
secondary
AC source
AXIS shelf
Power
& monitor
Power
& monitor
Power
Power
4A 3A 2A 1A
4A 3A 2A 1A
3B 2B 1B
3B 2B 1B
P3
P1
1B
1A
P1
1B
1A
P3
2B
2A
P2
P2
H8286
MGX 8220 shelf MGX 8220 shelf
MGX 8220 shelf