Making a Case for Type MC-HL Cables: Applications and Advantages of the Continuously Welded Corrugated Cable

Continuously Welded Corrugated (CWC) Armored Cables, classified by Underwriters Laboratories (UL) as a metal-clad (MC) hazardous location (HL) type, are being specified and used in all types of industrial, commercial, and utility installations. They supply plant electrical power and distribute power to motors, pumps, fans, and other equipment. A large percentage of these cables are extensively used in the petrochemical industry. Their use has become so widespread that the National Electrical Code (NEC) has permitted their use in a variety of code articles. In this article, we will review the various advantages and uses, the code articles, and the proper installation methods for CWC armored cables.