04/09/2021 - I am an electrical contractor. I have a situation where I have upgraded the electrical meter service and the main electrical panel. Now, In Cobb County, GA or Marietta, GA. It is my understanding. I am required to install interconnecting smoke detectors in each bedroom. Bedroom being defined as a room that has a closet and a window. So, I have been told by a Marietta electrical inspector that long life battery powered Wireless interconnecting smoke and carbon type detectors are now allowed as of 2020. Is that Correct? What is the code for that?Do you recommend any particular product that meets the code?