30 CFR § 57.12084 - Branch circuit disconnecting devices.

---
identifier: "/us/cfr/t30/s57.12084"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 57.12084 - Branch circuit disconnecting devices."
title_number: 30
title_name: "Mineral Resources"
section_number: "57.12084"
section_name: "Branch circuit disconnecting devices."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "K"
subchapter_name: "METAL AND NONMETAL MINE SAFETY AND HEALTH"
part_number: "57"
part_name: "SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811."
regulatory_source: "50 FR 4082, Jan. 29, 1985, unless otherwise noted."
cfr_part: "57"
---


# 57.12084 Branch circuit disconnecting devices.

Disconnecting switches that can be opened safely under load shall be provided underground at all branch circuits extending from primary power circuits near shafts, adits, levels and boreholes.