Switching 4510 from 110 to 208 volts

Question

We have a 4510 (WS-C4510R+E, with WSX45SUP7-E) with redundant supervisors and dual 6000W power supplies (PWR-C45-6000ACV) currently running at 110 volts. We are installing four Nema L6-20 receptacles to be able to have full PoE and redundancy across our power supplies.
Will it be possible to cut over from 110 to 208volts while the switch is running, by unplugging the old cords and plugging in the new cords, one by one?
Or, will we have to shut down the switch entirely, plug all new power cables in, and then power the switch back up?
-John

Answer 1

Hi,
The 6000 W AC-input power supply should not be used in mixed-voltage configurations. All the inputs in a chassis must be at the same voltage (110 VAC or 220 VAC). That said you will need to have both power supplies at the voltage at the same time, beacuse the two power supplies must have identical inputs and all inputs must be at the same voltage. If the input voltages are mismatched one of the power supplies will go into error-disable state.
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/54sg/configuration/guide/pwr_envr.html#wp1084405
Hope this helps.