I need to add afci breakers to make the house up to code. The problem I have is they ran 14-3 wire to share a circuit to two different rooms. So the square d afci breakers won't work. Do I have to change out the box to a company that makes afci breakers that work with 14-3 wire. Any help would be much appreciated. Ps I'm not a electrician and don't plan on doing it so my terms may be not all right.