I am a low voltage technician in WA state. I have o co-worker who is trying to pass the Journymans Exam, but is really struggling. He asks me all the time about D- Cable and M- Cable...I passed my test 4 years ago, but I have no idea what he is talking about. I have looked and searched and read trying to find the answer for him........hope on of you kno what these designations are.
Thanks
Thanks