30 C.F.R. § 77.703 Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems.
Title 30 - Mineral Resources
The frames of all stationary high-voltage equipment receiving power from ungrounded delta systems shall be grounded by methods approved by an authorized representative of the Secretary.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart H—Grounding
§ 77.703 Grounding frames of stationary high-voltage equipment receiving power from ungrounded delta systems.
