30 CFR Part 56Public Domain
§ 56.6603 — Air gap
Subpart E — Explosives
At least a 15-foot air gap shall be provided between the blasting circuit and the electric power source.
Public Domain: 30 CFR Part 56 (MSHA Safety and Health Standards — Surface 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.