CLASS B: Power Cables.
CLASS C: Power cables where more flexible stranding than Class B is desired.
CLASS D: Power cables where extra flexible stranding is desired.
CLASS G: All cables for portable use.
CLASS H: Cables where extreme flexibility is required. (i.e. take-up reels)
CLASS I: Apparatus cable and motor leads.
CLASS K: Cords and cables composed of No. 30 AWG copper wires. Stationary service.
CLASS M: Cords and cables composed of No. 34 AWG copper wires. Constant service.