If I fly from airport A-B that is 500 miles away, that is CC. Now if I leave airport B and go to C that is only 15 miles away is that also CC because I am away from my home airport? Or is it not CC becuase it is less than 50 NM from my departure point?

Since I only stopped at C for fuel I logged A-B-C in my log book and logged it as CC. What if I would have stopped at B for say a day or so and then headed over to B (15 miles away)?

I am at work and don't have my FAR/AIM with me so thanks for any replies.