Cable and Wire Types Explained
The following article is written by Rich Breman (Underwriters Laboratories). This article is intended to provide you the tools needed to understand cable and wire markings and to determine if these wires and cables are being used correctly.
Wire and cable types are divided into three tables in the Wire & Cable Marking Guide: Building wires and cables (including some industrial cables); Low voltage cables, flexible cords, and fixture wires; Special purpose wire and cable. Each type of wire or cable is identified by type designation, followed by associated NEC Article (if applicable), and followed by the respective UL product category (not marked on the wire).