MSHA - Code of Federal Regulations - 30 CFR 56.12006
Skip to content
MSHA - Title 30 CFR
30 CFR § 56.12006
Distribution boxes.

Distribution boxes shall be provided with a disconnecting device for each branch circuit. Such disconnecting devices shall be equipped or designed in such a manner that it can be determined by visual observation when such a device is open and that the circuit is deenergized, the distribution box shall be labeled to show which circuit each device controls.

For more information: See MSHA'S Program Policy Manual