30 CFR § 75.518 - Electric equipment and circuits; overload and short circuit protection.

---
identifier: "/us/cfr/t30/s75.518"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 75.518 - Electric equipment and circuits; overload and short circuit protection."
title_number: 30
title_name: "Mineral Resources"
section_number: "75.518"
section_name: "Electric equipment and circuits; overload and short circuit protection."
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"
---


# 75.518 Electric equipment and circuits; overload and short circuit protection.

****[Statutory Provision]

Automatic circuit-breaking devices or fuses of the correct type and capacity shall be installed so as to protect all electric equipment and circuits against short circuit and overloads. Three-phase motors on all electric equipment shall be provided with overload protection that will deenergize all three phases in the event that any phase is overloaded.