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Easy Access to UL 508A Supplement SA1.1 on

July 11, 2018

Quickly Find and Select UL Listed and Recognized Components for Industrial Control Panels on

Q: What changed with UL 508A Supplement SA?

A: The content in Table SA1.1 is being relocated to, which is accessible to the public. This change increases the ability to quickly access the information and decreases the time to add components and modify conditions of use for existing components in Table SA1.1.

Q: Why did UL 508A Supplement SA move to

A: On July 28, 2017, and March 19, 2018, a proposal to remove Supplement SA from UL 508A and relocate the information therein to achieved and maintained consensus.

Q: Where is Supplement SA located?

A: In accordance with this decision by STP 508A, the information in Supplement SA may now be found by visiting

Q: What does this mean for industry?

A: With an industry that is constantly changing and improving, this will provide greater flexibility for panel manufacturers in the selection and use of Listed and Recognized components.

Q: Who determines component acceptance criteria?

A: Supplement SA component acceptance criteria is determined by the testing organization. Section 4 of UL 508A provides requirements on component use.

Q: What does UL 508A Standard cover?

A: UL 508A Standard covers industrial control panels intended for general industrial use, operating from a voltage of 1000 volts or less. This equipment is intended for installation in ordinary locations, in accordance with the National Electrical Code, ANSI/NFPA 70, where the ambient temperature does not exceed 40°C (104°F) maximum.

Q: Where can I purchase UL 508A?

A: UL 508A can be purchased on

Q: Who do I contact with questions?

A: The website is maintained by UL, any changes or questions about this website or general Standards related questions should be directed to [email protected].

Technical questions and changes related to the supplement should be sent to [email protected].