Re: Two Breakers in a Single Switch Plate
Yup. Pretty common. The only rule I know of is that you can't have two circuits on the same "yoke". meaning switch, receptacle, etc. That's why you need a voltage tester to make sure it's safe to work on. i found out the hard way that I have the same setup. Remodeling my kitchen and I had 4 switches in two 4X4 switch boxes. I replaced them with one 2X4 each with those double switches that fit behind a duplex receptacle type cover. Well....when I got the SNOT knocked out of me disconnecting the old wiring, I discovered that there were two circuits in one box. My fault...I never would have done it without checking voltage if I was at work, but at home, I think the brain takes the weekend off too.
Just because you can, it doesn't mean you should!