HARTING Technology Group

New to UL508? Start here...

What is UL?

UL (Underwriters Laboratory) is a safety consultation and certification company that develops safety standards for electrical devices and components.  This is done through testing, validation, and inspecting. They also provide auditing, advising, and training services.

Essentially, a UL certification is a guarantee of the safety of a product and is evidence of third party certification 

What is UL 508?

UL 508 (508A and 508C) is a standard for electrical control cabinets and switchgear. It ensures machine builders and their customers (as well as regulators and insurers) that the cabinet can be operated reliably

 and, most importantly, safely. Globally, it is not the only standard covering control cabinet safety, but is the one most often used in North America.

When is UL 508A needed?

The need for UL 508 compliance is often dictated by the needs of the end customer.  A UL certification is a safety and reliability guarantee to the end customer so some will only use UL 508 certified cabinets in their facilities.

For a control panel to carry the UL mark only UL-recognized and listed components can be used in the cabinet.  Manufacturers that carry a UL 508A Listing Mark are subject to unannounced inspections by UL. This auditing process ensures that the manufacturer continues to meet certification requirements. 
The UL 508 label certifies that the panel meets the UL 508 safety standard and was produced by a UL Listed Panel Shop. 

Where does HARTING fit into the UL 508A Standard? 

HARTING has created two possibilities for using its industrial connectors to make electrical connections in UL 508 control panels, switchgear and other control systems. The first is the creation of an extensive range of “UL-Listed”, pre-assembled, connector-based cable assemblies that meet the requirements of UL 2237 (“PVVA” section), a complementary standard to UL 508 that governs multi-point connections of power cables in industrial machinery. 

The second is made possible through the newly launched “PVVA2” section of UL 2237, which was established by UL at the request of HARTING. It allows for field assembly using individual “UL-Recognized” components. The PVVA2 classification facilitates the use of connectors in a UL 508-certified cabinet, which in turn will deliver benefits throughout all stages of product design, fabrication, testing and commissioning, with enormous time and cost savings over hard-wired connections. HARTING connectors are the only rectangle connectors that have undergone rigorous testing by UL to gain “ULRecognized” (PVVA2) status, which also makes them suitable for incorporation in PVVA cable assemblies. A wide range of HARTING connectors now have “UL-Recognized” status, and many more HARTING products will be added to both the PVVA and PVVA2 lists in the months and years to come.