(a) Power sources shall be capable of delivering sufficient current to
energize all electric detonators to be fired with the type of circuits used.
Storage or dry cell batteries are not permitted as power sources.
(b) Blasting machines shall be tested, repaired, and maintained in accordance
with manufacturer's instructions.
(c) Only the blaster shall have the key or other control to an electrical
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