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Manufacturing of electric and changing message signs

General Coverage Electric Sign Program

UL's Electric Sign General Coverage Program allows manufacturers who custom build or mass produce electric signs to apply the UL Listing Mark at their factories. This program makes it convenient to receive a UL Listing and allows you to maintain flexibility in the design of your signs. The UL standard used to test electric signs is UL 48, The Standard for Safety for Electric Signs. To learn more about the requirements of this standard, please read the scope of UL 48.

Changing Message Sign Program

The changing message sign program has been adjusted significantly to be more sign manufacturer friendly. Where the description report was relatively precise, the description has been reduced to provide for variable size, pixel density and multiple power supply use. The standard UL 48 is used for the overall requirements and the Sign Component Standard, UL 879 is used for the electronic components portion. As Changing Message Signs can be relatively large, most of the time, the evaluation is conducted at the convenience of the manufacturer in their own facilities.

Why should you produce UL Listed signs?

  • Increase your competitive advantage.
    As a UL Listed sign producer, you can offer signs that meet UL 48 or UL 1433 requirements. You can also bid on jobs that specify UL Listed signs only.
  • Cover all requirements.
    Using UL Listed or Recognized components in a sign does not guarantee or imply that the entire assembly meets all applicable safety requirements. UL's General Coverage Sign Program and Changing Message Sign Program cover proper component usage, enclosure environmental ratings, conformance to the National Electric Code (NEC), wiring protection and safety markings.
  • Avoid red-tagged signs at the installation site.
    When you avoid this, you will also avoid the resulting delays and extra cost associated with red tags.
  • Obtain the UL Mark.
    The UL Mark has long stood as the benchmark for safety in industry. Regulatory authorities in every jurisdiction in the United States and Canada recognize and accept the UL Mark.

Search for UL Listed sign manufacturers

Specific information regarding companies that have UL Listings through our General Coverage Sign Program and Changing Message Sign Program can be found using UL's Certifications database. To search for signs covered under these two programs, first go to the Search by Category Control Number (CCN)/ File Number page.

  • For General Coverage Sign Program Listings, enter the letters "UXYT" in the space that asks for the Category Control Number (CCN).
  • For Changing Message Sign Program Listings, enter the letters "UYFS" in the CCN space.

Listed companies that comply with the requirements for these categories will appear.

Contact UL's sign testing staff

If you need immediate assistance, please select our Contact UL link in the menu bar above for phone numbers and e-mail addresses of staff who can assist you.

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