What’s the difference between UL Listed and UL Recognized wires and cables? Our customers often ask this question so here’s the lowdown.

Underwriters Laboratories, or UL, is a global safety certification company that conducts quality and safety tests to ensure safety, performance efficiency, quality, and environmental impact on a variety of wires and cables. They make sure that products are constructed correctly and that wires and cable sizes can handle the proper voltage and right amount of current.

Industries that might receive testing include energy, healthcare, industrial systems, security, chemicals, consumer electronics, and automotive.

There are two main distinctions of UL certification and they are very different. Often, customers inquire about UL Listed vs. UL Recognized wires and cables. Each type has their own unique aspects, and we will help outline those differences.


UL Listed Wires and Cables

UL Listed is for standalone products or consumer products that then go into the market. This is the mark that is most familiar and found on consumer goods. When you see this on a product, it means that it has been tested for safety before entering the market. UL Listed marks are on the products themselves.

UL Recognized Wires and Cables

UL Recognized is different than UL Listed because it does not apply to the end products themselves. Having UL Recognition certifies that a component within a machine or larger mechanism meets UL Standards. This allows manufacturers to pick and choose which components are certified within a larger system. UL-Recognized stamps are generally easier and more economical to attain since the whole system is not being tested and therefore not Listed.

Requirements for UL Certification

For cables and wires to achieve UL certification, UL has established a series of requirements that must be met. The characteristics of the wires and cables that are examined include:

  • Temperature dry and temperature wet
  • Voltage rating
  • Outdoor use
  • Sunlight resistance
  • Cable tray use
  • Oil resistance
  • Gasoline resistance
  • Direct burial
  • Submersible pump use

Be sure to check out the UL cable and wire guide for detailed specifications on UL certification!

Our Wire and Cable Assemblies

With most of our purchased cable and wire being UL certified, the assemblies we build are reliable and of high quality. In addition, our manufacturing capabilities allow us to process a variety of material types, including ETFE, PTFE, FEP, EPDM, PUR, CPE, Silicone, XLPE, PVC, and Fiberglass. Because of all the different cable jackets that are available, we have several pieces of equipment which can handle high and low volume orders for each of these materials.

The MJM Industries process includes:

  • Cutting
  • Stripping
    • Thermal
    • Laser
    • Mechanical
  • Termination
    • Crimp
    • Weld
    • Solder
  • Encapsulation
    • Insert molding
    • Hot melt
    • Potting
  • Coiling
  • Printing

Our state-of-the-art facility features a 5S philosophy, ISO 9001standards, and IPC A-620 workmanship standards.

Industries We Serve

MJM Industries is a leading contract manufacturer of overmolded wire and cable harnesses, cable assemblies, flat flex assemblies, and box builds. Our reliable products help serve a wide array of industries! These include:

  • Defense and military
  • Consumer products
  • Industrial automation
  • Communication
  • Medical equipment
  • Mass transit
  • Water equipment
  • Commercial off-road
  • Utilities
  • Heavy equipment
  • Appliance
  • Test and measurement
  • Transportation

About MJM Industries

At MJM Industries, we are a world-class, custom contract manufacturing company that specializes in a variety of custom wire assemblies and engineering services. Our team is committed to quality assurance and offering the best value to our customers.

If you are searching for a reliable company with UL certification products, MJM Industries is here to meet your needs. Contact us today to learn more about our manufacturing services! We’d love to hear from you and are ready to make your job easier.