30 CFR § 77.700 - Grounding metallic sheaths, armors, and conduits enclosing power conductors.

---
identifier: "/us/cfr/t30/s77.700"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 77.700 - Grounding metallic sheaths, armors, and conduits enclosing power conductors."
title_number: 30
title_name: "Mineral Resources"
section_number: "77.700"
section_name: "Grounding metallic sheaths, armors, and conduits enclosing power conductors."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "O"
subchapter_name: "COAL MINE SAFETY AND HEALTH"
part_number: "77"
part_name: "MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF 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."
regulatory_source: "36 FR 9364, May 22, 1971, unless otherwise noted."
cfr_part: "77"
---


# 77.700 Grounding metallic sheaths, armors, and conduits enclosing power conductors.

Metallic sheaths, armors, and conduits enclosing power conductors shall be electrically continuous throughout and shall be grounded by methods approved by an authorized representative of the Secretary.