Anybody out there a home electrician? I would like to do a quick call to get some advice on creating a new AFCI 20 amp breaker off the existing box. I'm thinking of running 12gauage wire from the new breaker to a junction box in the attic, then from there run under ground wire out the side of the house and through the yard (under ground) to create a power supply/box. I've done some research but would like to talk to someone with experience. Any help would be much appreciated! Thanks!