I'm bidding on a house to update the electrical service,the owner has all 2 wire receptables in the house ,they want to change them out to new TR grounded ones ,I can't get access to all of them because they have a finished basement.I will use the methods according to nec 406.3. We are under 2011 rules .Do i need to have these circuits on an AFCI breaker?These are wired on a multi-circuit without a ground.I will run new wiring to the outlets that are accessible and will use an AFCI breaker for the TR outlets.