1 Scope

This Part applies to Class L fuses rated 100 – 6000 A and 600 V ac. DC ratings are optional.

Summary of Topics

This reaffirmation of ANSI/UL 248-10 dated December August 19, 2025 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, CSA Group, and ANCE are committed to updating this harmonized standard jointly. However, the revision pages dated August 19, 2025 will not be jointly issued by ULSE, CSA Group, and ANCE as these revision pages only address UL ANSI approval dates.