To apply for my PCC Credential, can I use the Mentor Coaching I used in my ACC Credential or for a renewal of my ACC Credential?

If the mentoring you used previously for was completed with a PCC or a MCC credentialed coach, you can use those same hours towards your PCC. If it was done by an ACC, then you will need to get mentoring with a PCC or MCC. 

Please keep in mind that if your previous mentoring was focused on preparing you for the ACC level only, consider obtaining additional mentor coaching.  Additional hours with a mentor can help you evaluate if your coaching skills are consistently at the PCC level and assist in locating recorded coaching sessions to submit in your application that display your current coaching skills to their strongest.