30 CFR Part 57Public Domain
§ 57.6405 — Firing devices
Subpart E — Explosives
(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 firing device.
Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.