Search U.S. government technical reports digitized or harvested by TRAIL.
Safety rules for installing and using electrical equipment in coal mines
Some suggestions on the safe handling of electric shovel trailing cables in open-pit mines
Analysis of the use of electricity at coal mines :progress report 2
Two devices to prevent electric arcs with airdox operations in coal mines
A study of stray electric currents in airdox systems in coal mines
Recommended standards for alternating current in coal mines
Evaluation of sensitive ground fault interrupters for coal mines