I have a problem where my AFCI breaker (Siemans Type OAF 15amp) trips in my bedroom. It has done this sporadically over the past 3 years since the house was built. Sometimes it will clear itself up and sometimes it will not. I most recently replaced the AFCI breaker and it is still tripping.
I have nothing plugged into any of the outlets and the ceiling fan/ light switches are off. I reset the breaker and turn on the light switch, the breaker trips. I pull the cord to turn the light off, reset the breaker and turn on the switch, the breaker does not trip. With the light switch off, I then start testing outlets. I plug a power cord (such as an extension cord or one that goes to a computer) into an outlet (knowing there is absolutely zero load on the cord) and the breaker trips.
Where should I now turn to find my suspect. From what i've been able to see of the wiring in the attic above my room, it looks fine...there are no anchor nails piercing the shielding of any of the wires. There have never been any nails placed in the walls since the house was built. Should I check for loose connections on every outlet? Is the suspect in any of the unseen wiring somewhere in the walls? Can I just dump the AFCI and go to a regular breaker?
Thanks all for your help in clearing up this pesky matter.