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State mining laws on the use of electricity in and about coal mines

Operation and maintenance of electrical equipment approved for permissibility by the Bureau of Mines

Hazards from low or under voltage

State regulations governing the use of trolley wires in mines

Performance tests for trailing cables

How leakage of current from an electric shot-firing circuit causes misfires

The grounding of electric systems in and around mines

Specially recommended trailing cable

Suggestions for wiring permissible equipment

Specially recommended trailing cables

Requirements for bolts and similar fastenings for permissible electrical equipment

Data in reference to installation of cables in shafts and boreholes

250 versus 500 volts or more for circuits in gassy coal mines


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