Juniper EX9214 Hardware Manual page 225

3. If you are using the power supply in one-feed mode, move the AC input switch located on the chassis
above the power supply to the Off (O) position. If you are using the power supply in two-feed mode,
set the power switch on the power supply faceplate also to the Off (O) position.
4. If you are using the power supply in one-feed mode, remove the coupler end of the power cord from
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,
remove the coupler end of the other power cord from the AC appliance inlet on the power supply
faceplate also.
214