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Welcome to the UL 508 Practical Application Guidelines On-Line Service (PAGOS)UL 508 PAG

Wondering how the requirements in the UL 508 Safety Standard affect the design of your products?

Need to change your design, but not sure how the changes will be affected by the UL 508 Requirements?

If you're looking for a resource to help you answer these kind of questions, the Practical Application Guidelines On-Line Service (PAGOS) can help.

The PAGOS for UL 508, the Standard for Industrial Control Equipment, Seventeenth Edition, provides a source of reference for understanding and applying the requirements of UL 508. Updated whenever a new application is approved and published, PAGOS brings together an unmatched combination of standards interpretation and powerful interactive capabilities.

Service Features for UL 508 PAGOS

You can search the UL 508 PAG database and access the specific PAGs you are interested in by topic, keyword, PAG number and/or release date. You can also print specific PAGs or all of the PAGs.

The UL 508 Practical Application Guidelines On-Line Service is an Internet service made available by Underwriters Laboratories Inc. for its clients, jurisdictional authorities and other interested parties. These guidelines are not intended to take the place of the requirements in those UL Standards for Safety, nor to establish additional requirements.

Questions about the PAGOS system?

If you have questions about the UL 508 PAGOS, please feel free to e-mail the PAGOS Administrator at: 508pag@ul.com. We can also be reached by fax at: +1-847-509-6258, or by mail at:

Underwriters Laboratories Inc.
Attention: PAGOS Administrator, 3018ANBK
333 Pfingsten Road
Northbrook, IL 60062

One other PAGOS is currently available: UL 1950, the Standard for Safety of Information Technology Equipment, Including Electrical Business Equipment, Third Edition.

Contact Customer Service

UL Customer Service Professionals are available from 7:00 AM - 6:00 PM across all North American time zones to provide you with a quote or project status, or to offer you assistance in resolving non-technical questions. Contact a customer service professional, learn how to submit a product for testing or begin the product submission process.

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