Clarifying Cable Ratings
Understanding the terms and meanings
Before diving into semantics of ratings and listings, let’s first differentiate between codes and standards. The basic difference is that codes are enforceable by law and standards are voluntary. Codes use terms such as “must,” whereas standards use “shall.” Codes basically tell you what you need to do and standards tell you how to do it. Codes, which are primarily written, adopted and enforced by the National Electric Code (NEC), ensure correct and safe installed products. These are also product standards, which include performance and construction criteria that go hand-in-hand with system standards, which are established to define installation requirements to fit the application from both a practical and economic standpoint in regards to design and maintenance.