California is broken into many sections, so you will need to use the 
three-letter code for your section.  The FD rules list all the section codes.



At 03:22 PM 6/2/2015, you wrote:
>Hello list,
>
>I've scanned the Field Day rules to determine what I should be 
>exchanging in a contact.
>
>I'll be working my home station but with battery power and QRP, and 
>I'm in California. So is the exchange
>"class e, CA"?
>
>Thank you.