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BS 6708 TYPE 321

Mining Certficated Cables

Certificates :

APPLICATION

Used for supplying excavating, crushing machines
and equipment. Can also be used as trailing cable in
quarries.

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 : 1900/3300 V
TEST VOLTAGE : 7.5 kV

Cross Section4×354×504×704×954×120
Conductors
Number and cross sectionmm24×354×504×704×954×120
Strandingmm276/0,40396/0,40360/0,50475/0,50608/0,50
Conductor diameterNom. mm8.4010.1011.9013.9015.50
Insulation thicknessmm4.04.04.04.04.0
Cable details
Radial thickness of inner sheathmm2.53.83.85.05.0
Min. inner sheath diametermm40.847.752.860.363.9
Max. inner sheath diametermm43.350.255.863.366.9
Size of armourmm7/0,907/0,907/0,907/1,257/1,25
Outer sheath thicknessmm5.05.45.96.46.8
Min. overall diametermm56.263.970.080.685.0
Max. overall diametermm60.067.774.084.989.3
Min. bending radiusmm7208138881.0191.072
Appx. cable weightkg/km6.658.810.3815.3518.2
Copper weightkg/km1.3441.922.6883.6484.608
Electrical details
“Continuous current
rating at 25°C Ambient”
A135170205250295
Max. DC resistance at 20°C
Phase conductorsΩ /km0.5650.3930.2770.2100.164
ArmourΩ /km1.00.80.530.400.32
Inter Airport Fuar
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