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Provisional Recognition for Electrical Insulation Systems

This testing program provides you with an early indication of your product’s performance to help determine if it’s suitable for UL Listing or Recognition.

Colorful insulated wires


Provisional Recognition provides you with an early indication of product performance. It is permitted for specific products, components, materials or systems to determine suitability for UL Listing or Recognition. Products, components, materials or systems eligible for Provisional Recognition – including items covered under UL Solutions' electrical insulation systems (EIS) test program – may require one or more long-term tests.

Provisional Recognition may be granted after approximately 2,000 hours of thermal aging if the data generated at two or more temperature points confirms your desired rating points. Provisional Recognition is essentially identical to final Component Recognition, with the understanding that it is granted based on preliminary thermal aging data. Provisional Recognition is temporarily assigned based on projected final ratings from data that is being developed. We may raise or lower the rating once thermal aging has been completed.

Provisional Recognition template

To request Provisional Recognition, manufacturers must complete and sign the UL Provisional Recognition template on company letterhead to indicate their understanding of the implications and risks involved with Provisional Recognition.

Provisional Recognition will not be provided without a completed document.


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