Does anyone have a solution for retrofitting arc fault breakers on two seperate 120v circuits with a shared neutral (14/3 Romex), where one circuit is a bedroom circuit and the other may be lighting ( I only want the arc fault for the bedroom circuit). Do they make a 120v arc fault breaker that you can connect the shared neutral. Specifically Sq D Homeline and Cutler Hammer BR series breakers.
If your panel is a Cutller Hammer CH style, not BR style you may be in luck. They have 2 pole afci breakers for that panel. I don't know if they are combination style however which is required for all new installations since the begining of 2008, per the 2005 nec. Also since it is a 2 pole breaker, both of the circuits would have to naturaly be afci protected. That is the only way I know of multiwire branch circuit wiring to work with ark fault technology. Good luck in your new adventure fishing in new cables.
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