30 CFR Part 57Public Domain

§ 57.6401 — Shunting

Subpart E — Explosives

Except during testing—

(a)Electric detonators shall be kept shunted until connected to the blasting line or wired into a blasting round;

(b)Wired rounds shall be kept shunted until connected to the blasting line; and

(c)Blasting lines shall be kept shunted until immediately before blasting.

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.