30 C.F.R. § 56.6402 Deenergized circuits near detonators.
Title 30 - Mineral Resources
Electrical distribution circuits within 50 feet of electric detonators at the blast site shall be deenergized. Such circuits need not be deenergized between 25 to 50 feet of the electric detonators if stray current tests, conducted as frequently as necessary, indicate a maximum stray current of less than 0.05 amperes through a 1-ohm resistor as measured at the blast site.
Title 30: Mineral Resources
PART 56—SAFETY AND HEALTH STANDARDS—SURFACE METAL AND NONMETAL MINES
Subpart E—Explosives
Electric Blasting
§ 56.6402 Deenergized circuits near detonators.
