I had run a 12/3 w.g 220v circuit to my attic, and then branched into two 12/2 w.g to run 110v to each of two separate GFCI-protected wall outlets. Originally I had a ganged double pole 20a 220v breaker supplying this paired circuit, and all was well. And the electrical inspector was content.
But then a different electrical inspector told me that instead i needed to have AFCI breakers in the breaker box, since these outlets are in bedrooms. So, I bought two 20a AFCIs (I could find no double pole 220v AFCIs and the guy at HomeDepot said with this situation they should have been on two separate breakers anyway.)
Well, now the AFCIs trip (both of them simultaneously) whenever there is any load on either circuit. My guess is that because there is a shared neutral, the AFCIs are getting confused. But I am also wondering if the problem might be because there are GFCIs at each outlet. Can GFCIs and AFCIs cooexist okay? If so, then is there a way to use AFCIs in this situation?
Thanks for your help.
emichaelb