Stack exchange FAQ sites list this:
A maximum of 30 votes can be cast per user per day, and you can earn a maximum of 200 reputation per day (although accepted answers and bounty awards are immune to this limit). Please note that votes for posts marked “community wiki” do not generate reputation.
This needs to be updated to the new 40 vote limit. A question was posted in money's meta because of the text of the Vox Populi badge and the reference to 40 votes. I hoped to point them to the FAQ, but the FAQ is wrong.