Underwriters Laboratories (UL) is a nonprofit organization that sets standards for product safety and performance. When a product meets UL standards, it means the product has been tested and certified to meet certain safety and performance criteria.
When you do get into the document, here is what you should focus on to understand the standard: ul 183 gratis
Unlike standard appliance wiring material (AWM) or building wire (such as THHN), UL 183 rated cables are designed with redundant safety features to ensure circuit integrity even under extreme conditions. The standard, often referred to as "Manufactured Wiring
The standard, often referred to as "Manufactured Wiring Systems," ensures that even though the components are assembled off-site, they maintain the same, or better, safety performance as traditionally wired systems. The Importance of UL 183 in Modern Construction they maintain the same