30 C.F.R. § 77.809 Identification of circuit breakers and disconnecting switches.
Title 30 - Mineral Resources
Circuit breakers and disconnecting switches shall be labeled to show which units they control, unless identification can be made readily by location.
Title 30: Mineral Resources
PART 77—MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES
Subpart I—Surface High-Voltage Distribution
§ 77.809 Identification of circuit breakers and disconnecting switches.
