30 CFR § 75.519 - Main power circuits; disconnecting switches.

---
identifier: "/us/cfr/t30/s75.519"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 75.519 - Main power circuits; disconnecting switches."
title_number: 30
title_name: "Mineral Resources"
section_number: "75.519"
section_name: "Main power circuits; disconnecting switches."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "O"
subchapter_name: "COAL MINE SAFETY AND HEALTH"
part_number: "75"
part_name: "MANDATORY SAFETY STANDARDS—UNDERGROUND COAL 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, 813(h), 957."
regulatory_source: "35 FR 17890, Nov. 20, 1970, unless otherwise noted."
cfr_part: "75"
---


# 75.519 Main power circuits; disconnecting switches.

****[Statutory Provision]

In all main power circuits, disconnecting switches shall be installed underground within 500 feet of the bottoms of shafts and boreholes through which main power circuits enter the underground area of the mine and within 500 feet of all other places where main power circuits enter the underground area of the mine.