6500 4000W Power Supply adaptors?

[adboland]

I have a customer who has purchased 4000W power supplies for the 6500.  Power budget is not an issue, but it only comes with the L6-30 plug.  They only have L6-20 plugs in their closets.  Is there a way to get an adaptor for this or do they need to go to a 6000W power supply with dual L6-20 connections?  Any help will be greatly appreciated.

Thanks.

[Collin Clark]

You could use a pigtail-

http://www.stayonline.com/nema-locking-20-amp-adapters.aspx

You need to be careful about going from 30A to 20A, use at your own risk.