Trailing cable on ac mining equipment where service conditions are severe and maximum safety is mandatory; such as power shovels and drag lines in open-pit mines, quarries, gantry cranes and slag reclaiming.
Used for high voltage distribution in underground mines where frequent relocation is necessary or where extra flexibility and toughness is desired.
Standards:
ICEA S-75-381/NEMA WC-58 (Portable and Power Feeder Cables for Use in Mines and Similar Applications.) CFR Title 30 Federal Regulations (MSHA 7K-228054.) ASTM B172 (Rope-Lay-Stranded Copper Conductors Having Bunch-Stranded Members, for Electrical Conductors.) ASTM B174 (Bunch-Stranded Copper Conductors for Electrical Conductors.)
Conductor:
Soft or annealed tinned coated copper conductor, rope lay flexible stranding per ASTM B172, or bunched stranding per ASTM B174.
Type W EPR Insulated, CPE Jacketed, 2 kV
Type W 2C to 4C, EPR Insulated, CPE Jacketed, 2 kV
Type G-GC 3C, EPR Insulated, CPE Jacketed, 2 kV
Type MP-GC XLPE Insulated, PVC Jacketed, 5 kV – 25 kV, 100% & 133% I.L., Copper Tape Shielded
Type MP-GC EPR Insulated, CPE Jacketed, 5 kV – 25 kV, 100% & 133% I.L., Copper Tape Shielded