We are doing a project (single family home) where the existing main electrical panel is going to become a sub panel do to an addition to the house. Panel won't be moving but it will be converted into a sub panel. Electrical inspector says that he considers all the existing branch circuits to be modified. He is requiring us to provide AFCI protection for any circuits that are required to be AFCI protected. He is citing 210.12(B) of the 2014 NEC. I say no as we did not modify the individual branch circuits only the feeder going to the sub panel. I called the electrical inspectors supervisor and they are discussing what to do.:roll::roll: