BS 6708 Type 70, Type 71 Mining Cable

Used for supplying excavating, crushing machines and equipment, as well as coalface lighting.

Rated voltage320/550 V

ConductorElectrolytic, stranded, tinned copper wire IEC 60228 Class 5

InsulationEPR

Outer sheathHeavy duty chloroprene outer sheath.

Product Overview

Used for supplying excavating, crushing machines and equipment, as well as coalface lighting.

Rated voltage	320/550 V
Conductor	Electrolytic, stranded, tinned copper wire IEC 60228 Class 5
Insulation	EPR
Outer sheath	Heavy duty chloroprene outer sheath.
Layup	All cores are laid up in contact with each other.
Bedding	Rubber based bedding compound.
Armour	Galvanized steel pliable armour.
Related standards	BS 6708
Test voltage	1.5 kV

Cross Section		4×4	5×4
Conductors
Number and cross section	mm2	4×4	5×4
Insulation thickness	mm	1.0	1.0
Cable details
Radial thickness of inner sheath	mm	2.0	2.0
Min. inner sheath diameter	mm	15.8	17.2
Max. inner sheath diameter	mm	17.8	19.2
Size of armour	mm	7/0,45	7/0,45
Outer sheath thickness	mm	2.5	2.5
Min. overall diameter	mm	23.5	24.9
Max. overall diameter	mm	26.0	27.4
Min. bending radius	mm	234	247
Max. pulling tension	kgf	96	100
Appx. cable weight	kg/km	1.1	1.23
Copper weight	kg/km	154	192
Electrical details
“Continuous current rating at 25°C Ambient”	A	28	28
Max. DC resistance at 20°C
Phase Conductor	Ω /km	5.09	5.09
Armour	Ω /km	5.07	4.63

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