30 C.F.R. § 77.904 Identification of circuit breakers.
Title 30 - Mineral Resources
Circuit breakers shall be labeled to show which circuits 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 J—Low- and Medium-Voltage Alternating Current Circuits
§ 77.904 Identification of circuit breakers.
