Languages :

BS Types

Home » Mining Cables » BS 6708 TYPE 70, TYPE 71

BS 6708 TYPE 70, TYPE 71

APPLICATION

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

Certificates
Technical Information

CONDUCTOR : Electrolytic, stranded, tinned copper wire IEC 60228 Class 5
INSULATION : EPR
LAYUP : All cores are laid up in contact with each other.
BEDDING : Rubber based bedding compound.
ARMOUR : Galvanized steel pliable armour.
OUTER SHEATH : Heavy duty chloroprene outer sheath.

RELATED STANDARDS : BS 6708
RATED VOLTAGE : 320/550 V
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

 

We use cookies on our website to provide you a better experience. For detailed information please visit Our Cookie Policy and Clarification Text.