One way to obtain a reliable EIS is to adopt a system that has already undergone 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 chose between a traditional and an electronic adoption. Both options can be completed in approximately two to four weeks, but electronic adoptions reduce paperwork and enable UL to provide up-to-date revisions of the adopted EIS at no cost.


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.


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.

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, UL 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 UL. Should changes be desired prior to the adoption of a system, we recommend consulting with a UL engineer to determine what, if any, testing will be required to implement these changes.