I am upgrading my 6509 chassis that currently run SupII with 1300W a/c power supplies with Sup720 and 2500W a/c power supplies. I did not notice the power plug for the 2500W supply required a 220v connection. Can I run these on 110V cords?
Are you using 2500W or 3000W power supplies? Either way you should be fine.
Note: If you are going to use 110V to the power remember that they are running in combined mode. If one of the two power supplies fail or gets unplugged it will not be able to fully support the chassis and shut down some line cards.