30 C.F.R. § 57.12081 Bonding metal pipelines to ground return circuits.
Title 30 - Mineral Resources
All metal pipelines, 1,000 feet or more in length running parallel to trolley tracks, that are used as a ground return circuit shall be bonded to the return circuit rail at the ends of the pipeline and at intervals not to exceed 500 feet.
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart K—Electricity
Underground Only
§ 57.12081 Bonding metal pipelines to ground return circuits.
