Quote Originally Posted by MyMilan View Post

I understand what you're saying, but in this case (with the square D AFCI) it appears it was the breakers fault. While researching AFCI breakers I remember running across a recall for them. Also, some people having issues with the square D brand of AFCI breakers replaced them with other brands - and guess what, the nuisance tripping all went away. It appears that the square D AFCI breakers were just poorly designed. There have even been people on this forum complaining about them. I was also told that Home Depot received so many complaints about them that they don't even sell them anymore. I don't know if they've been redesigned or not. In any case I'm just glad that I don't have to use square D AFCI breakers in my square D panel
I agree - Sq D AFCIs are not good, at least the ones I had the pleasure to use...