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Adopting Electrical Insulation Systems

To ensure that your electrical insulation is reliable, we can help you adopt a system that has already undergone full thermal aging and sealed-tube chemical compatibility testing.

A close-up image of a gloved hand connecting wires in a laboratory setting.


One way to obtain a reliable electrical insulation system (EIS) is to adopt a system that has already undergone full thermal aging, also known as long-term thermal aging, and sealed-tube testing. These EIS are UL Recognized Components under the category of System Components, Electrical Insulation (OBJS2) and have been evaluated for component suppliers. If the products in this category cover all the materials needed for constructing your insulation system, no testing is required.

If a system adoption will work for your needs, you can choose between a traditional or an electronic adoption. Both options can be completed in approximately two to four weeks, but electronic adoptions reduce paperwork and enable us to provide up-to-date revisions of the adopted EIS at no cost.

Request a traditional EIS adoption by accessing the UL iQ™ for Electrical Insulation Systems database. A hard copy of the EIS construction details will be created and placed in your product’s follow-up procedure.

Request an electronic EIS adoption by accessing the UL iQ™ for Electrical Insulation Systems database. A single page detailing the EIS ratings will be added to your file along with instructions for using the online database to find materials suitable for use in the insulation system.

Information needed for all adoptions includes:

  • The OBJS2 listee’s name and the insulation system designation for the desired system
  • Your desired designation for the insulation system being adopted
  • Your intended use for the insulation system, such as that used in complete products, e.g. motors, transformers; product pairs, e.g. stators, armatures; or as a combination of products.
  • Your preferred adoption method, electronic or traditional. If requesting an electronic adoption, please confirm that all of your manufacturing facilities have reliable internet access.

Prior to adopting an EIS, we strongly recommends visiting the UL iQ™ for Electrical Insulation Systems database to review the details surrounding your desired system and to ensure that you fully understand what you will be obtaining from us. Should changes be desired prior to the adoption of a system, we recommend consulting with one of our engineers to determine what, if any, testing will be required to implement these changes.


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