In an earlier post I indicated I always leave a loop of romex on each can. I do this as a precaution in case any of the connections need to be redone and also if the can might need to be moved a couple of inches. This is mainly with new construction cans. With remodel cans, how much extra wire there is, within reason, just gets pushed up in the ceiling with the can.

Thanks texasredhead. Just to clarify, however, my question is: does code require that I leave 6" of wire protruding from the box on recessed can lights? This is new construction.

Thanks.

Not to my knowledge.