BS 6708 Type 307 Mining Cable

Used for supplying excavating, crushing machines and equipment.

Rated voltage1,9/3,3 kV
ConductorElectrolytic, stranded, tinned copper wire IEC 60228 Class 5
InsulationEPR (Ground core is not insulated).
Outer sheathHeavy duty chloroprene outer sheath.
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  • Documentation on request
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Product Overview

Used for supplying excavating, crushing machines and equipment.

Technical Specifications

Rated voltage1,9/3,3 kV
ConductorElectrolytic, stranded, tinned copper wire IEC 60228 Class 5
InsulationEPR (Ground core is not insulated).
Outer sheathHeavy duty chloroprene outer sheath.
SeparatorColored Textile tape for core identification.
ScreenTinned copper / Nylon braided screen over phase cores. Pilot core is not screened.
LayupAll cores are laid up in contact with the bare copper earth conductor.
BeddingRubber based bedding compound.
Related standardsBS 6708
Test voltage7,5 kV
Cross Section3×25+25+163×35+25+163×50+35+253×70+50+353×95+50+503×120+70+703×150+70+95
Phase Conductor
Number and cross sectionmm23×253×353×503×703×953×1203×150
Insulation diameterNom. mm13.1014.7015.7017.7019.1021.4023.00
Screen diameterNom. mm15.5017.1017.7019.7021.1023.4025.00
Earth Conductor
Number and cross sectionmm21×251×251×351×501×501×701×95
Strandingmm196/0,40196/0,40276/0,40396/0,40396/0,40360/0,50475/0,50
Conductor diameterNom. mm7.007.008.5010.0010.0011.7013.50
Pilot Conductor
Number and cross sectionmm21×161×161×251×351×501×701×95
Strandingmm126/0,40126/0,40196/0,40276/0,40396/0,40360/0,50475/0,50
Conductor diameterNom. mm5.505.507.008.5010.0011.701.35
Insulation diameterNom. mm11.6011.6013.1014.7015.7017.7019.10
Cable details
Min. overall diametermm47.451.656.862.868.973.475.9
Max. overall diametermm49.954.659.865.872.777.279.7
Min. bending radiusmm400440480525580615640
Max. pulling tensionkgf6408301.21.68222
Appx. cable weightkg/km44.86.157.69.2511.213
Copper weightkg/km1.6541.9482.6663.4824.3465.456
Electrical details
Continuous current rating at 25°C AmbientA110135170205250295320
Intermittent current rating at 25°C AmbientA130155210255315360385
Max. DC resistance at 20°C
Phase ConductorΩ /km0.7950.5650.3930.2770.210.1640.132
Pilot ConductorΩ /km1.241.240.7950.5650.3930.2770.21
3 screens and earth in parallel connectionΩ /km0.50.50.350.350.280.280.14
Nom. reactance at 50HzΩ /km0.1250.1170.1130.1080.1050.1010.098
Nom. reactance at 60HzΩ /km0.150.1410.1360.1290.1260.1210.118
Min. insulation resistance at 20°CM Ω /km12501100950820720660600
3 phase voltage drop on full load currentmV/A/m1.691.210.850.610.480.390.32

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