I have an old house, built 1925 that still has part of the wiring in the original separated 2-conductor on post style of wiring to 2 rooms, all off of one 15 A breaker. I was originally hoping to put in grounded plugs without necessarily rewiring, but that doesn't look legal. I'm wondering if an AFCI breaker might be available for the brand of subpanel box that I have? The current breakers are the two switch per breaker design and I have been unable to find an AFCI breaker that that can handle two circuits in that space. I'm thinking that if I could put in a more modern breaker that I could then put in 3 prong receptacles with labels indicating they do not have equipment grounding.