Electrical installations for open-cast mines and quarries. General recommendations for protection against direct contact and electric shock|Earth terminals, Electric reactors, Electric conductors, Industrial electrical installations, Mining equipment, Overhead power lines, Outdoor electric equipment, Electric power systems, Resistors, Protective barriers, Quarries, Electrical equipment, Enclosures, Electric shocks, Mathematical calculations, Circuit-breakers, Safety measures, Occupational safety, Area, Short-circuit currents, Protected electrical equipment, Electrical safety, Earth electrodes, Overhead line conductors, Electrical protection equipment, Earthing, Overcurrent protection, Automatic, Earth conductors, Electrical components, Classification systems, Safety devices, Electrical faults, Mines, Fault currents, Electrical installations