Search U.S. government technical reports digitized or harvested by TRAIL.
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