Summary of Topics s498C_1_sum.htmlSummary of Topics
This reaffirmation of ANSI/UL 498C dated May 13, 2026 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS). No technical changes have been made.
As noted in the Commitment for Amendments statement located on the back side of the title page, ULSE and CSA are committed to updating this harmonized standard jointly. However, the revisions dated May 13, 2026 will not be jointly issued by ULSE and CSA as these revisions address UL ANSI approval dates only.