Came out today to add a doorbell and chime kit from scratch. I came off of the foyer circuit. Cut in my box for the transformer and the chime in the study, on the other side of the wall from the foyer. I ran my low voltage wire to the old intercom box. I replaced the breaker with a dual function breaker. I had to separate neutrals in a 3 gang switch box for the dual function breaker to operate properly. The homeowners are having a security company install cameras and a camera doorbell. They needed a doorbell to make this happen. So the doorbell that is in right now is temporary until the security company comes on Monday. While running my low voltage wire I accidentally drilled through the drywall. I patched it up and the homeowner said not to worry about it. He will sand it and paint it. I gave him an additional discount for his troubles. Doorbell and chime work great and the homeowners are happy with the work