Ac Power Cord Specifications For An Ex9214 Switch - Juniper EX9214 Hardware Manual

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a customer site circuit breaker rated for 15.0 A @ 250 VAC circuit breaker minimum for each AC power
supply, or one that complies with the local code. Doing so enables you to operate the switch in any
configuration without upgrading the power infrastructure.
You can provide one or two feeds to the power supply. If you are using the power supply in one-feed
mode, you must connect the power cord into the AC appliance inlet located on the chassis above the
power supply. This is the recommended inlet when using the power supply in one-feed mode. If you are
using the power supply in two-feed mode, you must connect another power cord to the AC appliance
inlet on the power supply faceplate also.
AC Power Supply Configurations
EX9214 switches support two or four AC power supplies, installed vertically at the rear of the chassis in
slots PEM0 through PEM3 (left to right), in two zones: power supplies in slots PEM0 and PEM2 provide
power to the lower fan tray, line card slots 6 through 11, and SF slots 1 and 2; power supplies in slots
PEM1 and PEM3 provide power to the upper fan tray, line card slots 0 through 5, and SF slot 0. There
must be at least one power supply in each zone.
Four power supplies provide full redundancy. If a power supply in a redundant configuration is removed
or fails, its redundant power supply takes over without interruption. The power supply in PEM2 serves
as redundant power supply to the power supply in slot PEM0 and the power supply in PEM3 serves as
redundant power supply to the power supply in slot PEM1. If only two power supplies are installed, they
must be installed in slots PEM0 and PEM1 or in slots PEM2 and PEM3.
SEE ALSO
Connecting AC Power to an EX9214 Switch | 174

AC Power Cord Specifications for an EX9214 Switch

Each AC power supply has a single AC appliance inlet located on the power supply that requires a
dedicated AC power feed. Most sites distribute power through a main conduit that leads to frame-
mounted power distribution panels, one of which can be located at the top of the rack that houses the
switch. An AC power cord connects each power supply to the power distribution panel.
You can order detachable AC power cords, each approximately 8 ft (2.5 m) long that supply AC power to
the switch. The C19 appliance coupler end of the cord inserts into the AC appliance inlet coupler, type
C20 (right angle) as described by International Electrotechnical Commission (IEC) standard 60320. The
plug end of the power cord fits into the power source receptacle that is standard for your geographical
location.