1 Scope

1.1 These requirements cover Class K and Class R fuses having an additional D-C rating and that are intended for use in protecting trailing cables in D-C circuits in mines in accordance with the requirements of the United States Department of Labor, Mine Safety and Health Administration.

1.2 These fuses have a maximum current rating of 600 A, a voltage rating of 300 or 600 V dc, and an interrupting rating of 20,000 A dc.

Summary of Topics

This new edition of ANSI/UL 198M, Standard for Safety for Mine-Duty Fuses, is being issued to reaffirm approval as an American National Standard. No changes in requirements are involved.