(a) On and after the effective date of this part, fuses shall be
considered to be approved for use with direct current in providing
short-circuit protection for trailing cables in coal mines only where such
fuses are: (1) The same in all respects as those fuses which have been
approved after meeting the minimum requirements for performance and
short-circuit protection prescribed in this Part 28; and (2) maintained in
an approved condition.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401