This Training Reels mini-course covers how the NEC defines cable types according to class and function (Class 1,2,3, communications, FO, etc.), and the required “listing” (designation of the cables fire/smoke characteristics) that must by on any cable that is installed in a dwelling (commercial or residential). This video segment is from our “Residential Installation Basics” DVD training course, available at www.trainingdept.com. Length: 2:57 Less